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  • Oracle on Oracle: Is that all?

    - by Darin Pendergraft
    On October 17th, I posted a short blog and a podcast interview with Chirag Andani, talking about how Oracle IT uses its own IDM products. Blog link here. In response, I received a comment from reader Jaime Cardoso ([email protected]) who posted: “- You could have talked about how by deploying Oracle's Open standards base technology you were able to integrate any new system in your infrastructure in days. - You could have talked about how by deploying federation you were enabling the business side to keep all their options open in terms of companies to buy and sell while maintaining perfect employee and customer's single view. - You could have talked about how you are now able to cut response times to your audit and security teams into 1/10th of your former times Instead you spent 6 minutes talking about single sign on and self provisioning? If I didn't knew your IDM offer so well I would now be wondering what its differences from Microsoft's offer was. Sorry for not giving a positive comment here but, please your IDM suite is very good and, you simply aren't promoting it well enough” So I decided to send Jaime a note asking him about his experience, and to get his perspective on what makes the Oracle products great. What I found out is that Jaime is a very experienced IDM Architect with several major projects under his belt. Darin Pendergraft: Can you tell me a bit about your experience? How long have you worked in IT, and what is your IDM experience? Jaime Cardoso: I started working in "serious" IT in 1998 when I became Netscape's technical specialist in Portugal. Netscape Portugal didn't exist so, I was working for their VAR here. Most of my work at the time was with Netscape's mail server and LDAP server. Since that time I've been bouncing between the system's side like Sun resellers, Solaris stuff and even worked with Sun's Engineering in the making of an Hierarchical Storage Product (Sun CIS if you know it) and the application's side, mostly in LDAP and IDM. Over the years I've been doing support, service delivery and pre-sales / architecture design of IDM solutions in most big customers in Portugal, to name a few projects: - The first European deployment of Sun Access Manager (SAPO – Portugal Telecom) - The identity repository of 5/5 of the Biggest Portuguese banks - The Portuguese government federation of services project DP: OK, in your blog response, you mentioned 3 topics: 1. Using Oracle's standards based architecture; (you) were able to integrate any new system in days: can you give an example? What systems, how long did it take, number of apps/users/accounts/roles etc. JC: It's relatively easy to design a user management strategy for a static environment, or if you simply assume that you're an <insert vendor here> shop and all your systems will bow to that vendor's will. We've all seen that path, the use of proprietary technologies in interoperability solutions but, then reality kicks in. As an ISP I recall that I made the technical decision to use Active Directory as a central authentication system for the entire IT infrastructure. Clients, systems, apps, everything was there. As a good part of the systems and apps were running on UNIX, then a connector became needed in order to have UNIX boxes to authenticate against AD. And, that strategy worked but, each new machine required the component to be installed, monitoring had to be made for that component and each new app had to be independently certified. A self care user portal was an ongoing project, AD access assumes the client is inside the domain, something the ISP's customers (and UNIX boxes) weren't nor had any intention of ever being. When the Windows 2008 rollout was done, Microsoft changed the Active Directory interface. The Windows administrators didn't have enough know-how about directories and the way systems outside the MS world behaved so, on the go live, things weren't properly tested and a general outage followed. Several hours and 1 roll back later, everything was back working. But, the ISP still had to change all of its applications to work with the new access methods and reset the effort spent on the self service user portal. To keep with the same strategy, they would also have to trust Microsoft not to change interfaces again. Simply by putting up an Oracle LDAP server in the middle and replicating the user info from the AD into LDAP, most of the problems went away. Even systems for which no AD connector existed had PAM in them so, integration was made at the OS level, fully supported by the OS supplier. Sun Identity Manager already had a self care portal, combined with a user workflow so, all the clearances had to be given before the account was created or updated. Adding a new system as a client for these authentication services was simply a new checkbox in the OS installer and, even True64 systems were, for the first time integrated also with a 5 minute work of a junior system admin. True, all the windows clients and MS apps still went to the AD for their authentication needs so, from the start everybody knew that they weren't 100% free of migration pains but, now they had a single point of problems to look at. If you're looking for numbers: - 500K directory entries (users) - 2-300 systems After the initial setup, I personally integrated about 20 systems / apps against LDAP in 1 day while being watched by the different IT teams. The internal IT staff did the rest. DP: 2. Using Federation allows the business to keep options open for buying and selling companies, and yet maintain a single view for both employee and customer. What do you mean by this? Can you give an example? JC: The market is dynamic. The company that's being bought today tomorrow will be sold again. Companies that spread on different markets may see the regulator forcing a sale of part of a company due to monopoly reasons and companies that are in multiple countries have to comply with different legislations. Our job, as IT architects, while addressing the customers and employees authentication services, is quite hard and, quite contrary. On one hand, we need to give access to all of our employees to the relevant systems, apps and resources and, we already have marketing talking with us trying to find out who's a customer of the bough company but not from ours to address. On the other hand, we have to do that and keep in mind we may have to break up all that effort and that different countries legislation may became a problem with a full integration plan. That's a job for user Federation. you don't want to be the one who's telling your President that he will sell that business unit without it's customer's database (making the deal worth a lot less) or that the buyer will take with him a copy of your entire customer's database. Federation enables you to start controlling permissions to users outside of your traditional authentication realm. So what if the people of that company you just bought are keeping their old logins? Do you want, because of that, to have a dedicated system for their expenses reports? And do you want to keep their sales (and pre-sales) people out of the loop in terms of your group's path? Control the information flow, establish a Federation trust circle and give access to your apps to users that haven't (yet?) been brought into your internal login systems. You can still see your users in a unified view, you obviously control if a user has access to any particular application, either that user is in your local database or stored in a directory on the other side of the world. DP: 3. Cut response times of audit and security teams to 1/10. Is this a real number? Can you give an example? JC: No, I don't have any backing for this number. One of the companies I did system Administration for has a SOX compliance policy in place (I remind you that I live in Portugal so, this definition of SOX may be somewhat different from what you're used to) and, every time the audit team says they'll do another audit, we have to negotiate with them the size of the sample and we spend about 15 man/days gathering all the required info they ask. I did some work with Sun's Identity auditor and, from what I've been seeing, Oracle's product is even better and, I've seen that most of the information they ask would have been provided in a few hours with the help of this tool. I do stand by what I said here but, to be honest, someone from Identity Auditor team would do a much better job than me explaining this time savings. Jaime is right: the Oracle IDM products have a lot of business value, and Oracle IT is using them for a lot more than I was able to cover in the short podcast that I posted. I want to thank Jaime for his comments and perspective. We want these blog posts to be informative and honest – so if you have feedback for the Oracle IDM team on any topic discussed here, please post your comments below.

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  • C# need help debugging socks5-connection attemp

    - by Chuck
    Hi, I've written the following code to (successfully) connect to a socks5 proxy. I send a user/pw auth and get an OK reply (0x00), but as soon as I tell the proxy to connect to whichever ip:port, it gives me 0x01 (general error). Socket socket5_proxy = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); IPEndPoint proxyEndPoint = new IPEndPoint(IPAddress.Parse("111.111.111.111"), 1080); // proxy ip, port. fake for posting purposes. socket5_proxy.Connect(proxyEndPoint); byte[] init_socks_command = new byte[4]; init_socks_command[0] = 0x05; init_socks_command[1] = 0x02; init_socks_command[2] = 0x00; init_socks_command[3] = 0x02; socket5_proxy.Send(init_socks_command); byte[] socket_response = new byte[2]; int bytes_recieved = socket5_proxy.Receive(socket_response, 2, SocketFlags.None); if (socket_response[1] == 0x02) { byte[] temp_bytes; string socks5_user = "foo"; string socks5_pass = "bar"; byte[] auth_socks_command = new byte[3 + socks5_user.Length + socks5_pass.Length]; auth_socks_command[0] = 0x05; auth_socks_command[1] = Convert.ToByte(socks5_user.Length); temp_bytes = Encoding.Default.GetBytes(socks5_user); temp_bytes.CopyTo(auth_socks_command, 2); auth_socks_command[2 + socks5_user.Length] = Convert.ToByte(socks5_pass.Length); temp_bytes = Encoding.Default.GetBytes(socks5_pass); temp_bytes.CopyTo(auth_socks_command, 3 + socks5_user.Length); socket5_proxy.Send(auth_socks_command); socket5_proxy.Receive(socket_response, 2, SocketFlags.None); if (socket_response[1] != 0x00) return; byte[] connect_socks_command = new byte[10]; connect_socks_command[0] = 0x05; connect_socks_command[1] = 0x02; // streaming connect_socks_command[2] = 0x00; connect_socks_command[3] = 0x01; // ipv4 temp_bytes = IPAddress.Parse("222.222.222.222").GetAddressBytes(); // target connection. fake ip, obviously temp_bytes.CopyTo(connect_socks_command, 4); byte[] portBytes = BitConverter.GetBytes(8888); connect_socks_command[8] = portBytes[0]; connect_socks_command[9] = portBytes[1]; socket5_proxy.Send(connect_socks_command); socket5_proxy.Receive(socket_response); if (socket_response[1] != 0x00) MessageBox.Show("Damn it"); // I always end here, 0x01 I've used this as a reference: http://en.wikipedia.org/wiki/SOCKS#SOCKS_5 Have I completely misunderstood something here? How I see it, I can connect to the socks5 fine. I can authenticate fine. But I/the proxy can't "do" anything? Yes, I know the proxy works. Yes, the target ip is available and yes the target port is open/responsive. I get 0x01 no matter what I try to connect to. Any help is VERY MUCH appreciated! Thanks, Chuck

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  • Ping.eu

    - by Sarang
    Found an interesting resource thanks to a close friend. Ping.eu is a free service which would let you test various aspects related to networks which would typically be pain inducing doing it on your own. For seasoned network professional having a MAC address of their own instead of a name :) this might not be that useful. However for a layperson like me this an invaluable resource. These guys provide you with following services: Ping – Shows how long it takes for packets to reach host Traceroute – Traces the route of packets to destination host from our server DNS lookup – Look up DNS record WHOIS – Lists contact info for an IP or domain Port check – Tests if port is opened on specified IP Reverse lookup – Gets hostname by IP address Proxy checker – Detects a proxy server Mail relaying – Tests relaying capabilities of specified mail-server Bandwidth meter – Detects your download speed from our server Network calculator – Calculates subnet range by network mask Network mask calculator – Calculates network mask by subnet range Country by IP – Detects country by IP or hostname Unit converter – Converts values from one unit to another   Taken straight from their site. Thanks Ping.eu

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  • Getting a handle on mobile data

    - by Eric Jensen
    Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;} written by Ashok Joshi The proliferation of mobile devices in the corporate world is both a blessing as well as a challenge.  Mobile devices improve productivity and the velocity of business for the end users; on the other hand, IT departments need to manage the corporate data and applications that run on these devices. Oracle Database Mobile Server (DMS for short) provides a simple and effective way to deal with the management challenge.  DMS supports data synchronization between a central Oracle database server and data on mobile devices.  It also provides authentication, encryption and application and device management.  Finally, DMS is a highly scalable solution that can be used to manage hundreds of thousands of devices.   Here’s a simplified outline of how such a solution might work. Each device runs local sync and mgmt agents that handle bidirectional data flow with an Oracle enterprise backend, run remote commands, and provide status to the management console. For example, mobile admins could monitor multiple networks of mobile devices, upgrade their software remotely, and even destroy the local database on a compromised device. DMS supports either Oracle Berkeley DB or SQLite for device-local storage, and runs on a wide variety of mobile platforms. The schema for the device-local database is pretty simple – it contains the name of the application that’s installed on the device as well as details such as product name, version number, time of last access etc. Each mobile user has an account on the monitoring system.  DMS supports authentication via the Oracle database authentication mechanisms or alternately, via an external authentication server such as Oracle Identity Management. DMS also provides the option of encrypting the data on disk as well as while it is being synchronized. Whenever a device connects with DMS, it sends the list of all local application changes to the server; the server updates the central repository with this information.  Synchronization can be triggered on-demand, whenever there’s a change on the device (e.g. new application installed or an existing application removed) or via a rule-based schedule (e.g. every Saturday). Synchronization is very fast and efficient, since only the changes are propagated.  This includes resume capability; should synchronization be interrupted for any reason, the next synchronization will resume where the previous synchronization was interrupted. If the device should be lost or stolen, DMS has the capability to remove the applications and/or data from the device. This ability to control access to sensitive data and applications is critical in the corporate environment. The central repository also allows the IT manager to track the kinds of applications that mobile users use and recommend patches and upgrades, while still allowing the mobile user full control over what applications s/he downloads and uses on the device.  This is useful since most devices are used for corporate as well as personal information. In certain restricted use scenarios, the IT manager can also control whether a certain application can be installed on a mobile device.  Should an unapproved application be installed, it can easily be removed the next time the device connects with the central server. Oracle Database mobile server provides a simple, effective and highly secure and scalable solution for managing the data and applications for the mobile workforce.

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  • Web Service - SOAP

    - by seth
    My experience with web services is slim and I'm trying to understand this a little bit more. I have done for instance a web service using visual studio. In order to use it, I add a web service reference in my projects and this creates a proxy and the use is pretty simple. Does this use SOAP? I ask this because i will be now facing a web service that i must communicate using SOAP with attachements and i'm trying to understand the concept behind this and the difference to what i have done so far. Will the proxy still be viable or do i need to create the XML by hand and post it to the web service? This concepts still confuse and so any help is appreciated. EDIT: I'm not developing the service, i will be just using it.

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  • Serve most of a domain with Apache, but use mod_proxy to serve some URLs from Lighttpd

    - by Alex Pineda
    So we wish to host some pages on a new server with apache2, and embed some of our old content & functionality from another server with lighttpd in an iframe. I'm looking at this configuration from the apache docs (http://httpd.apache.org/docs/2.2/vhosts/examples.html#page-header) under "Using Virtual_host and mod_proxy" together. <VirtualHost *:*> ProxyPreserveHost On ProxyPass / http://192.168.111.2/ ProxyPassReverse / http://192.168.111.2/ ServerName hostname.example.com </VirtualHost> The only issue is that I want to proxy only on a subdomain, or even better, if I can keep the top domain and proxy only if the url contains a particular path ie. "/myprocess.php". So in essence the DNS will point to the apache2 as the "master router".

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  • Can't connect to smtp (postfix, dovecot) after making a change and trying to change it back

    - by UberBrainChild
    I am using postfix and dovecot along with zpanel and I tried enabling SSL and then turned it off as I did not have SSL configured yet and I realized it was a bit stupid at the time. I am using CentOS 6.4. I get the following error in the mail log. (I changed my host name to "myhostname" and my domain to "mydomain.com") Oct 20 01:49:06 myhostname postfix/smtpd[4714]: connect from mydomain.com[127.0.0.1] Oct 20 01:49:16 myhostname postfix/smtpd[4714]: fatal: no SASL authentication mechanisms Oct 20 01:49:17 myhostname postfix/master[4708]: warning: process /usr/libexec/postfix/smtpd pid 4714 exit status 1 Oct 20 01:49:17 amyhostname postfix/master[4708]: warning: /usr/libexec/postfix/smtpd: bad command startup -- throttling Reading on forums and similar questions I figured it was just a service that was not running or installed. However I can see that saslauthd is currently up and running on my system and restarting it does not help. Here is my postfix master.cf # # Postfix master process configuration file. For details on the format # of the file, see the Postfix master(5) manual page. # # ***** Unused items removed ***** # ========================================================================== # service type private unpriv chroot wakeup maxproc command + args # (yes) (yes) (yes) (never) (100) # ========================================================================== smtp inet n - n - - smtpd # -o content_filter=smtp-amavis:127.0.0.1:10024 # -o receive_override_options=no_address_mappings pickup fifo n - n 60 1 pickup submission inet n - - - - smtpd -o content_filter= -o receive_override_options=no_header_body_checks cleanup unix n - n - 0 cleanup qmgr fifo n - n 300 1 qmgr #qmgr fifo n - n 300 1 oqmgr tlsmgr unix - - n 1000? 1 tlsmgr rewrite unix - - n - - trivial-rewrite bounce unix - - n - 0 bounce defer unix - - n - 0 bounce trace unix - - n - 0 bounce verify unix - - n - 1 verify flush unix n - n 1000? 0 flush proxymap unix - - n - - proxymap smtp unix - - n - - smtp smtps inet n - - - - smtpd # When relaying mail as backup MX, disable fallback_relay to avoid MX loops relay unix - - n - - smtp -o fallback_relay= # -o smtp_helo_timeout=5 -o smtp_connect_timeout=5 showq unix n - n - - showq error unix - - n - - error discard unix - - n - - discard local unix - n n - - local virtual unix - n n - - virtual lmtp unix - - n - - lmtp anvil unix - - n - 1 anvil scache unix - - n - 1 scache # # ==================================================================== # Interfaces to non-Postfix software. Be sure to examine the manual # pages of the non-Postfix software to find out what options it wants. # ==================================================================== maildrop unix - n n - - pipe flags=DRhu user=vmail argv=/usr/local/bin/maildrop -d ${recipient} uucp unix - n n - - pipe flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient) ifmail unix - n n - - pipe flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient) bsmtp unix - n n - - pipe flags=Fq. user=foo argv=/usr/local/sbin/bsmtp -f $sender $nexthop $recipient # # spam/virus section # smtp-amavis unix - - y - 2 smtp -o smtp_data_done_timeout=1200 -o disable_dns_lookups=yes -o smtp_send_xforward_command=yes 127.0.0.1:10025 inet n - y - - smtpd -o content_filter= -o smtpd_helo_restrictions= -o smtpd_sender_restrictions= -o smtpd_recipient_restrictions=permit_mynetworks,reject -o mynetworks=127.0.0.0/8 -o smtpd_error_sleep_time=0 -o smtpd_soft_error_limit=1001 -o smtpd_hard_error_limit=1000 -o receive_override_options=no_header_body_checks -o smtpd_bind_address=127.0.0.1 -o smtpd_helo_required=no -o smtpd_client_restrictions= -o smtpd_restriction_classes= -o disable_vrfy_command=no -o strict_rfc821_envelopes=yes # # Dovecot LDA dovecot unix - n n - - pipe flags=DRhu user=vmail:mail argv=/usr/libexec/dovecot/deliver -d ${recipient} # # Vacation mail vacation unix - n n - - pipe flags=Rq user=vacation argv=/var/spool/vacation/vacation.pl -f ${sender} -- ${recipient} And here is dovecot ## ## Dovecot config file ## listen = * disable_plaintext_auth = no protocols = imap pop3 lmtp sieve auth_mechanisms = plain login passdb { driver = sql args = /etc/zpanel/configs/dovecot2/dovecot-mysql.conf } userdb { driver = sql } userdb { driver = sql args = /etc/zpanel/configs/dovecot2/dovecot-mysql.conf } mail_location = maildir:/var/zpanel/vmail/%d/%n first_valid_uid = 101 #last_valid_uid = 0 first_valid_gid = 12 #last_valid_gid = 0 #mail_plugins = mailbox_idle_check_interval = 30 secs maildir_copy_with_hardlinks = yes service imap-login { inet_listener imap { port = 143 } } service pop3-login { inet_listener pop3 { port = 110 } } service lmtp { unix_listener lmtp { #mode = 0666 } } service imap { vsz_limit = 256M } service pop3 { } service auth { unix_listener auth-userdb { mode = 0666 user = vmail group = mail } # Postfix smtp-auth unix_listener /var/spool/postfix/private/auth { mode = 0666 user = postfix group = postfix } } service auth-worker { } service dict { unix_listener dict { mode = 0666 user = vmail group = mail } } service managesieve-login { inet_listener sieve { port = 4190 } service_count = 1 process_min_avail = 0 vsz_limit = 64M } service managesieve { } lda_mailbox_autocreate = yes lda_mailbox_autosubscribe = yes protocol lda { mail_plugins = quota sieve postmaster_address = [email protected] } protocol imap { mail_plugins = quota imap_quota trash imap_client_workarounds = delay-newmail } lmtp_save_to_detail_mailbox = yes protocol lmtp { mail_plugins = quota sieve } protocol pop3 { mail_plugins = quota pop3_client_workarounds = outlook-no-nuls oe-ns-eoh } protocol sieve { managesieve_max_line_length = 65536 managesieve_implementation_string = Dovecot Pigeonhole managesieve_max_compile_errors = 5 } dict { quotadict = mysql:/etc/zpanel/configs/dovecot2/dovecot-dict-quota.conf } plugin { # quota = dict:User quota::proxy::quotadict quota = maildir:User quota acl = vfile:/etc/dovecot/acls trash = /etc/zpanel/configs/dovecot2/dovecot-trash.conf sieve_global_path = /var/zpanel/sieve/globalfilter.sieve sieve = ~/dovecot.sieve sieve_dir = ~/sieve sieve_global_dir = /var/zpanel/sieve/ #sieve_extensions = +notify +imapflags sieve_max_script_size = 1M #sieve_max_actions = 32 #sieve_max_redirects = 4 } log_path = /var/log/dovecot.log info_log_path = /var/log/dovecot-info.log debug_log_path = /var/log/dovecot-debug.log mail_debug=yes ssl = no Does anyone have any ideas or tips on what I can try to get this working? Thanks for all the help EDIT: Output of postconf -n alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases broken_sasl_auth_clients = yes command_directory = /usr/sbin config_directory = /etc/postfix daemon_directory = /usr/libexec/postfix debug_peer_level = 2 delay_warning_time = 4 disable_vrfy_command = yes html_directory = no inet_interfaces = all mail_owner = postfix mailq_path = /usr/bin/mailq.postfix manpage_directory = /usr/share/man mydestination = localhost.$mydomain, localhost mydomain = control.yourdomain.com myhostname = control.yourdomain.com mynetworks = all newaliases_path = /usr/bin/newaliases.postfix queue_directory = /var/spool/postfix readme_directory = /usr/share/doc/postfix-2.2.2/README_FILES recipient_delimiter = + relay_domains = proxy:mysql:/etc/zpanel/configs/postfix/mysql-relay_domains_maps.cf sample_directory = /usr/share/doc/postfix-2.2.2/samples sendmail_path = /usr/sbin/sendmail.postfix setgid_group = postdrop smtp_use_tls = no smtpd_client_restrictions = smtpd_data_restrictions = reject_unauth_pipelining smtpd_helo_required = yes smtpd_helo_restrictions = smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination, reject_non_fqdn_sender, reject_non_fqdn_recipient, reject_unknown_recipient_domain smtpd_sasl_auth_enable = yes smtpd_sasl_local_domain = $myhostname smtpd_sasl_path = private/auth smtpd_sasl_security_options = noanonymous smtpd_sasl_type = dovecot smtpd_sender_restrictions = smtpd_use_tls = no soft_bounce = yes transport_maps = hash:/etc/postfix/transport unknown_local_recipient_reject_code = 550 virtual_alias_maps = proxy:mysql:/etc/zpanel/configs/postfix/mysql-virtual_alias_maps.cf, regexp:/etc/zpanel/configs/postfix/virtual_regexp virtual_gid_maps = static:12 virtual_mailbox_base = /var/zpanel/vmail virtual_mailbox_domains = proxy:mysql:/etc/zpanel/configs/postfix/mysql-virtual_domains_maps.cf virtual_mailbox_maps = proxy:mysql:/etc/zpanel/configs/postfix/mysql-virtual_mailbox_maps.cf virtual_minimum_uid = 101 virtual_transport = dovecot virtual_uid_maps = static:101

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  • Apache + Lighttpd serving from same Domain name

    - by Alex Pineda
    So we wish to host some pages on a new server w/ apache2, and embed some of our old content & functionality from another server w/ lighttpd in an iframe. I'm looking at this configuration from the apache docs (http://httpd.apache.org/docs/2.2/vhosts/examples.html#page-header) under "Using Virtual_host and mod_proxy" together. <VirtualHost *:*> ProxyPreserveHost On ProxyPass / http://192.168.111.2/ ProxyPassReverse / http://192.168.111.2/ ServerName hostname.example.com </VirtualHost> The only issue is that I want to proxy only on a subdomain, or even better, if I can keep the top domain and proxy only if the url contains a particular path ie. "/myprocess.php". So in essence the DNS will point to the apache2 as the "master router".

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  • Facebook and Gmail stop working after 10 minutes

    - by Julia
    I have problem with facebook and gmail only: It works fine and lets me log in, view photos and videos, read new messages, etc. But after 5-10 minuets it doesn't load at all This webpage is not available. The webpage at http://www.facebook.com/ might be temporarily down or it may have moved permanently to a new web address. More information on this error Below is the original error message Error 101 (net::ERR_CONNECTION_RESET): Unknown error After deleting cookies this problem disappears for 5-10 minuets, then I get the same error. It happens with Google Chrome and Firefox. Ping works fine. I have checked System-Preferences-Network Proxy it sets on Default - "Direct Internet Connection". Then I have run test (chrome://net-internals/#tests) and got some FAIL results Use system proxy settings Disable IPv6 host resolving Probe for IPv6 host resolving IPv6 is disabled.

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  • Encrypting your SQL Server Passwords in Powershell

    - by laerte
    A couple of months ago, a friend of mine who is now bewitched by the seemingly supernatural abilities of Powershell (+1 for the team) asked me what, initially, appeared to be a trivial question: "Laerte, I do not have the luxury of being able to work with my SQL servers through Windows Authentication, and I need a way to automatically pass my username and password. How would you suggest I do this?" Given that I knew he, like me, was using the SQLPSX modules (an open source project created by Chad Miller; a fantastic library of reusable functions and PowerShell scripts), I merrily replied, "Simply pass the Username and Password in SQLPSX functions". He rather pointed responded: "My friend, I might as well pass: Username-'Me'-password 'NowEverybodyKnowsMyPassword'" As I do have the pleasure of working with Windows Authentication, I had not really thought this situation though yet (and thank goodness I only revealed my temporary ignorance to a friend, and the embarrassment was minimized). After discussing this puzzle with Chad Miller, he showed me some code for saving passwords on SQL Server Tables, which he had demo'd in his Powershell ETL session at Tampa SQL Saturday (and you can download the scripts from here). The solution seemed to be pretty much ready to go, so I showed it to my Authentication-impoverished friend, only to discover that we were only half-way there: "That's almost what I want, but the details need to be stored in my local txt file, together with the names of the servers that I'll actually use the Powershell scripts on. Something like: Server1,UserName,Password Server2,UserName,Password" I thought about it for just a few milliseconds (Ha! Of course I'm not telling you how long it actually took me, I have to do my own marketing, after all) and the solution was finally ready. First , we have to download Library-StringCripto (with many thanks to Steven Hystad), which is composed of two functions: One for encryption and other for decryption, both of which are used to manage the password. If you want to know more about the library, you can see more details in the help functions. Next, we have to create a txt file with your encrypted passwords:$ServerName = "Server1" $UserName = "Login1" $Password = "Senha1" $PasswordToEncrypt = "YourPassword" $UserNameEncrypt = Write-EncryptedString -inputstring $UserName -Password $PasswordToEncrypt $PasswordEncrypt = Write-EncryptedString -inputstring $Password -Password $PasswordToEncrypt "$($Servername),$($UserNameEncrypt),$($PasswordEncrypt)" | Out-File c:\temp\ServersSecurePassword.txt -Append $ServerName = "Server2" $UserName = "Login2" $Password = "senha2" $PasswordToEncrypt = "YourPassword" $UserNameEncrypt = Write-EncryptedString -inputstring $UserName -Password $PasswordToEncrypt $PasswordEncrypt = Write-EncryptedString -inputstring $Password -Password $PasswordToEncrypt "$($Servername),$($UserNameEncrypt),$($PasswordEncrypt)" | Out-File c:\temp\ ServersSecurePassword.txt -Append .And in the c:\temp\ServersSecurePassword.txt file which we've just created, you will find your Username and Password, all neatly encrypted. Let's take a look at what the txt looks like: .and in case you're wondering, Server names, Usernames and Passwords are all separated by commas. Decryption is actually much more simple:Read-EncryptedString -InputString $EncryptString -password "YourPassword" (Just remember that the Password you're trying to decrypt must be exactly the same as the encrypted phrase.) Finally, just to show you how smooth this solution is, let's say I want to use the Invoke-DBMaint function from SQLPSX to perform a checkdb on a system database: it's just a case of split, decrypt and be happy!Get-Content c:\temp\ServerSecurePassword.txt | foreach { [array] $Split = ($_).split(",") Invoke-DBMaint -server $($Split[0]) -UserName (Read-EncryptedString -InputString $Split[1] -password "YourPassword" ) -Password (Read-EncryptedString -InputString $Split[2] -password "YourPassword" ) -Databases "SYSTEM" -Action "CHECK_DB" -ReportOn c:\Temp } This is why I love Powershell.

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  • Converting LINQ to Twitter to Twitter API v1.1

    - by Joe Mayo
    Twitter recently updated their API to v1.1 (Current status: API v1.1). Naturally, LINQ to Twitter  needed to be updated too. This blog post outlines the changes made to LINQ to Twitter during this conversion and highlights important features that LINQ to Twitter developers will want to know. Overall Impact Generally speaking, Twitter API v1.1 is semantically very much the same as it’s predecessor. The base URL changed and so did a few resource segments, but the resources themselves are still intact. The good news is that LINQ to Twitter has always shielded the developer from this plumbing, so the entities, types, and filters didn’t change much at all.  The following sections describe what did  change. Authentication In Twitter API v1.0 authentication was not required for some resources, such as user timelines and search. However, that’s all changed because *all* queries must be authenticated in Twitter API v1.1. LINQ to Twitter has various types of authorizers you can use, supporting whatever OAuth options are available via Twitter.  You can see the LINQ to Twitter documentation, Securing Your Applications, for more info on OAuth support. The New Search One of the larger changes to the API was Search. To be more specific, the Search entity now contains a List<Status>, named Statuses, to hold results.  Additionally, any meta-data associated with the search is now in a property named SearchMetaData. The change to the Search entity and responses is the big change, but the good news is that your Search query syntax doesn’t change. Different Rate Limits The issue of rate limits itself is contentious, but this discussion is focused on the coding experience and I’ll leave the politics to those who prefer to engage in that activity. What’s important here is that both headers and resources have changed. You should review Twitter’s Rate Limit documentation to understand what the changes mean.  A quick explanation is that rate limits are applied individually to each resource in 15 minute time intervals. In LINQ to Twitter these changes surface on the Help entity, via HelpType.RateLimits. The RateLimits query has a Resources filter where you can specify a comma-separated list of categories to return rate limit info for.  The results materialize in the RateLimits dictionary, keyed on category. The Help entity also has a RateLimitsAuthorizationContext, holding the Access Token for the user performing queries – and to whom the rate limits apply. In addition to the new RateLimits query, there are new RateLimit headers that appear in the query response, whose HTTP header name is of the form X-Rate-Limit… which is different from the previous header name. LINQ to Twitter surfaces these headers via the existing properties of the TwitterContext instance. For anyone who retrieved rate limit information via the Headers property of TwitterContext, you should be aware of the new header names.  I haven’t done anything with Feature rate limit properties yet, but they appear to no longer be available – this will require more follow-up. Error Handling Twitter API v1.1 has a new format for Error Codes & Responses. LINQ to Twitter wraps these messages in the TwitterQueryException, which has been updated appropriately. The Message property of TwitterQueryException now reflects the Twitter error message, when available. There’s also a new ErrorCode that’s populated with the message error code. Parameters Most parameters stayed the same, but one of interest is Include Entities (different from LINQ to Twitter data object entities). Entities are metadata hanging off tweets, that provide start/end position in the tweet and other information for mentions, urls, hash tags, and media. Entities used to not be included unless you specified you wanted them. Now, in v1.1, entities are included by default for all APIs that return a Status.  If you were always setting IncludeEntities to true, then you won’t see a change. However, be aware that you’ll now be receiving additional data in your response from Twitter, which will explain a sudden increase in bandwidth utilization. This might or might not  matter to you  depending on the requirements of your application, but you should be aware of it. Everything Else There might be small changes here and there that I haven’t mentioned, but these were the ones you should be most aware of.  Streams didn’t change, but Twitter will be deprecating username/password authentication on public streams, in favor of OAuth, so you’ll be seeing me make that change some time in the future.  Also, Twitter will continue to evolve the API and you can expect that LINQ to Twitter will change accordingly. Summary The big changes to Twitter API were Authentication, Search, Rate Limits, and Error Handling. All API calls must be authenticated. You’ll need to change your code to read Search results differently, but the query is much the same as you use now. There’s a new RateLimits API, one of the Help queries.  Also, the new error messages are integrated into TwitterQueryException. Besides these changes, I expect  most others to be small or affect a smaller percentage of developers.  You can get the latest version of LINQ to Twitter from NuGet or visit the LINQ to Twitter download page at CodePlex.com.   @JoeMayo

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  • ArchBeat Link-o-Rama for 2012-09-05

    - by Bob Rhubart
    OTN Architect Day - Boston - Sept 12: What to Expect If you've never attended an OTN Architect Day, here's a little preview. You start with a continental breakfast. Then you have keynotes by an Oracle expert, and a member of the Oracle ACE community. After that come the break-out sessions, so you have your choice of two sessions in each time slot. So you'll get in two breakouts before lunch. Then you eat. After that there's a panel Q&A during which the audience tosses questions at the assembled session speakers. Then it's on to another set of break-out sessions, followed by a short break. Then the audience breaks into small groups for round table discussions. After that there's a drawing for some cool prizes, followed by the cocktail reception. All that costs you absolutely zero. Register now. Starting and Stopping Fusion Applications the Right Way | Ronaldo Viscuso While the fastartstop tool that ships with Oracle Fusion Applications does most of the work to start/stop/bounce the Fusion Apps environment, it does not do it all. Oracle Fusion Applications A-Team blogger Ronaldo Viscuso's post "aims to explain all tasks involved in starting and stopping a Fusion Apps environment completely." Dodeca Customer Feedback - The Rosewood Company | Tim Tow Oracle ACE Director Tim Tow shares anecdotal comments from one of his clients, a company that is deploying Dodeca to replace an aging VBA/Essbase application. Configuring UCM cache to check for external Content Server changes | Martin Deh Oracle WebCenter and ADF A-Team blogger Martin Deh shares the background information and the solution to a recently encountered customer scenario. Proxy As Upgrade to 11g Does Not Like NQSession.User | Art of Business Intelligence "In Oracle BI 10g the application was a lot more tolerant of bad design and cavalier usage of variables," observes Oracle ACE Christian Screen. "We noticed an issue recently during an upgrade where the Proxy As configuration in Oracle BI 10g used the NQSession.User variable to identify the user logged into Presentation Servers acting as Proxy." Oracle WebLogic Server 11g: Interactive Quick Reference | Dirk Nachbar Oracle ACE Dirk Nachbar shares a quick post with information on a new interactive reference guide to Oracle WebLogic Server. "The Quick Reference shows you an architecural overview of the Oracle WebLogic Server processes, tools, configuration files, log files and so on including a short description of each section and the corresponding link to the Oracle WebLogic Server Documentation," says Nachbar. Thought for the Day "In fast moving markets, adaptation is significantly more important than optimization." — Larry Constantine Source: Quotes for Software Engineers

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  • Few GUI problems with minimal install

    - by Toki Tahmid
    I installed a minimal Ubuntu with a complete functional GUI, but facing a few problems. nm-applet's icon won't show in the notification area, but I can connect to wired internet fine. I am not able to configure my wireless or VPN this way. gksu's authentication screen is different from the usual graphical authentication - the screen turns gray as usual, but there are more options like save password for this session or keyring. And most importantly, it won't accept my password no matter what. And lastly, Gwibber seems to install no matter what, but there's not a single package in my knowledge that I installed has anything related to Gwibber. I would welcome any help regarding these three issues. I did not mention what packages I installed, because the list is long, but I will do so if anyone requests. Thank you in advance!

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  • Introducing Windows Azure Mobile Services

    - by Clint Edmonson
    Today I’m excited to share that the Windows Azure Mobile Services public preview is now available. This preview provides a turnkey backend cloud solution designed to accelerate connected client app development. These services streamline the development process by enabling you to leverage the cloud for common mobile application scenarios such as structured storage, user authentication and push notifications. If you’re building a Windows 8 app and want a fast and easy path to creating backend cloud services, this preview provides the capabilities you need. You to take advantage of the cloud to build and deploy modern apps for Windows 8 devices in anticipation of general availability on October 26th. Subsequent preview releases will extend support to iOS, Android, and Windows Phone. Features The preview makes it fast and easy to create cloud services for Windows 8 applications within minutes. Here are the key benefits:  Rapid development: configure a straightforward and secure backend in less than five minutes. Create modern mobile apps: common Windows Azure plus Windows 8 scenarios that Windows Azure Mobile Services preview will support include:  Automated Service API generation providing CRUD functionality and dynamic schematization on top of Structured Storage Structured Storage with powerful query support so a Windows 8 app can seamlessly connect to a Windows Azure SQL database Integrated Authentication so developers can configure user authentication via Windows Live Push Notifications to bring your Windows 8 apps to life with up to date and relevant information Access structured data: connect to a Windows Azure SQL database for simple data management and dynamically created tables. Easy to set and manage permissions. Pricing One of the key things that we’ve consistently heard from developers about using Windows Azure with mobile applications is the need for a low cost and simple offer. The simplest way to describe the pricing for Windows Azure Mobile Services at preview is that it is the same as Windows Azure Websites during preview. What’s FREE? Run up to 10 Mobile Services for free in a multitenant environment Free with valid Windows Azure Free Trial 1GB SQL Database Unlimited ingress 165MB/day egress  What do I pay for? Scaling up to dedicated VMs Once Windows Azure Free Trial expires - SQL Database and egress     Getting Started To start using Mobile Services, you will need to sign up for a Windows Azure free trial, if you have not done so already.  If you already have a Windows Azure account, you will need to request to enroll in this preview feature. Once you’ve enrolled, this getting started tutorial will walk you through building your first Windows 8 application using the preview’s services. The developer center contains more resources to teach you how to: Validate and authorize access to data using easy scripts that execute securely, on the server Easily authenticate your users via Windows Live Send toast notifications and update live tiles in just a few lines of code Our pricing calculator has also been updated for calculate costs for these new mobile services. Questions? Ask in the Windows Azure Forums. Feedback? Send it to [email protected].

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  • Google Bot trying to access my web app's sitemap

    - by geekrutherford
    Interesting find today...   I was perusing the event log on our web server today for any unexpected ASP.NET exceptions/errors. Found the following:   Exception information: Exception type: HttpException Exception message: Path '/builder/builder.sitemap' is forbidden. Request information: Request URL: https://www.bondwave.com:443/builder/builder.sitemap Request path: /builder/builder.sitemap User host address: 66.249.71.247 User: Is authenticated: False Authentication Type: Thread account name: NT AUTHORITY\NETWORK SERVICE   At first I thought this was maybe an attempt by a hacker to mess with the sitemap. Using a handy web site (www.network-tools.com) I did a lookup on the IP address and found it was a Google bot trying to crawl the application. In this case, I would expect an exception or 403 since the site requires authentication anyway.

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  • Installer Changes for AutoVue 20.2.0 Client/Server Deployment

    - by GrahamOracle
    Those upgrading to AutoVue 20.2.0 Client/Server Deployment will notice a few changes in the installation process as compared to previous releases. The two notable changes are: SSL configuration during the installer: To configure SSL encryption between the AutoVue VueServlet and AutoVue server. User authentication configuration during the installer: To configure Kerberos authentication between the AutoVue client and AutoVue server (for environments where users are not already authenticated to a back-end system). These configurations are optional although recommended. For more information regarding these options, check out Oracle’s KM Note 1437447.1, as well as the AutoVue 20.2.0 Client/Server Deployment documentation (namely the Installation and Configuration Guide).

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  • Peer did not return a certificate

    - by pfista
    I am trying to get two way SSL authentication working between a Python server and an Android client application. I have access to both the server and client, and would like to implement client authentication using my own certificate. So far I have been able to verify the server certificate and connect without client authentication. What sort of certificate does the client need and how do I get it to automatically send it to the server during the handshake process? Here is the client and server side code that I have so far. Is my approach wrong? Server Code while True: # Keep listening for clients c, fromaddr = sock.accept() ssl_sock = ssl.wrap_socket(c, keyfile = "serverPrivateKey.pem", certfile = "servercert.pem", server_side = True, # Require the client to provide a certificate cert_reqs = ssl.CERT_REQUIRED, ssl_version = ssl.PROTOCOL_TLSv1, ca_certs = "clientcert.pem", #TODO must point to a file of CA certificates?? do_handshake_on_connect = True, ciphers="!NULL:!EXPORT:AES256-SHA") print ssl_sock.cipher() thrd = sock_thread(ssl_sock) thrd.daemon = True thrd.start() I suspect I may be using the wrong file for ca_certs...? Client Code private boolean connect() { try { KeyStore keystore = KeyStore.getInstance("BKS"); // Stores the client certificate, to be sent to server KeyStore truststore = KeyStore.getInstance("BKS"); // Stores the server certificate we want to trust // TODO: change hard coded password... THIS IS REAL BAD MKAY truststore.load(mSocketService.getResources().openRawResource(R.raw.truststore), "test".toCharArray()); keystore.load(mSocketService.getResources().openRawResource(R.raw.keystore), "test".toCharArray()); // Use the key manager for client authentication. Keys in the key manager will be sent to the host KeyManagerFactory keyFManager = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm()); keyFManager.init(keystore, "test".toCharArray()); // Use the trust manager to determine if the host I am connecting to is a trusted host TrustManagerFactory trustMFactory = TrustManagerFactory.getInstance(TrustManagerFactory .getDefaultAlgorithm()); trustMFactory.init(truststore); // Create the socket factory and add both the trust manager and key manager SSLCertificateSocketFactory socketFactory = (SSLCertificateSocketFactory) SSLCertificateSocketFactory .getDefault(5000, new SSLSessionCache(mSocketService)); socketFactory.setTrustManagers(trustMFactory.getTrustManagers()); socketFactory.setKeyManagers(keyFManager.getKeyManagers()); // Open SSL socket directly to host, host name verification is NOT performed here due to // SSLCertificateFactory implementation mSSLSocket = (SSLSocket) socketFactory.createSocket(mHostname, mPort); mSSLSocket.setSoTimeout(TIMEOUT); // Most SSLSocketFactory implementations do not verify the server's identity, allowing man-in-the-middle // attacks. This implementation (SSLCertificateSocketFactory) does check the server's certificate hostname, // but only for createSocket variants that specify a hostname. When using methods that use InetAddress or // which return an unconnected socket, you MUST verify the server's identity yourself to ensure a secure // connection. verifyHostname(); // Safe to proceed with socket now ... I have generated a client private key, a client certificate, a server private key, and a server certificate using openssl. I then added the client certificate to keystore.bks (which I store in /res/raw/keystore.bks) I then added the server certificate to the truststore.bks So now when the client tries to connect I am getting this error server side: ssl.SSLError: [Errno 1] _ssl.c:504: error:140890C7:SSL routines:SSL3_GET_CLIENT_CERTIFICATE:peer did not return a certificate And when I try to do this in the android client SSLSession s = mSSLSocket.getSession(); s.getPeerCertificates(); I get this error: javax.net.ssl.SSLPeerUnverifiedException: No peer certificate So obviously the keystore I am using doesn't appear to have a correct peer certificate in it and thus isn't sending one to the server. What should I put in the keystore to prevent this exception? Furthermore, is this method of two way SSL authentication safe and effective?

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  • How to create a restricted SSH user for port forwarding?

    - by Lekensteyn
    ændrük suggested a reverse connection for getting an easy SSH connection with someone else (for remote help). For that to work, an additional user is needed to accept the connection. This user needs to be able to forward his port through the server (the server acts as proxy). How do I create a restricted user that can do nothing more than the above described? The new user must not be able to: execute shell commands access files or upload files to the server use the server as proxy (e.g. webproxy) access local services which were otherwise not publicly accessible due to a firewall kill the server Summarized, how do I create a restricted SSH user which is only able to connect to the SSH server without privileges, so I can connect through that connection with his computer?

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  • ArchBeat Facebook Friday: Top 10 Shared Links - May 23-29, 2014

    - by OTN ArchBeat
    Among the 5,144 fans of the OTN ArchBeat Facebook Page the following Top 10 items were the most popular over the last seven days, May 23-29, 2014. GlassFish/Java EE Community Open Forum Today! | Reza Rahman Have questions about Glassfish? Java EE/GlassFish evangelist Reza Rahman has answers, and you can pick his brain tomorrow during an online forum organized by the London Glassfish User Group and C2B2. The event is free, but you must register in order to participate. Click the link for more information. Twitter Tuesday - Top 10 @ArchBeat Tweets - May 20-26, 2014 The top 10 @OTNArchBeat tweets for the week of May 20-26, 2014. Topics covered include ADF, Cloud, GoldenGate, KScope14, OBIEE, ODI, WebLogic, WebCenter, and more. FrameworkFolders Support has come to Oracle WebCenter Portal | JayJay Zheng Interested in working with Framework Folders in Oracle WebCenter Portal? Oracle ACE JayJay Zheng reviews the essentials. Video: Programming Best Practices - ADF Business Components | Frank Nimphius Frank Nimphius discusses best practices and recommendations for ADF Business Components in the latest video from ADF Architecture TV. Video: Kscope 2014 Preview: Data Modeling and Moving Meditation with Kent Graziano For your mind and your body! Oracle ACE Director Kent Graziano previews his Kscope 2014 data modeling presentations and the early morning Chi Gung sessions he will once again lead for Kscope attendees. OAG and OES Integration for Web API Security: skin and guts | Andre Correa A-Team architect Andre Correa's post examines a strategy for web API security that uses OAG (Oracle API Gateway) and OES (Oracle Entitlements Server). Getting Started with Coherence*Web in WebLogic Server 12.1.2 | Tim Middleton Solution architect Tim Middleton shows you how to configure Coherence*Web in WebLogic Server 12.1.2 and deploy a basic web application. SOA and Business Processes: You are the Process! Part of the 13-part "Industrial SOA" article series, this article looks at best practices for modeling and managing effective business processes. Authentication in Oracle Identity Federation/ IdP | Damien Carru Damien Carru discuss authentication when OIF acts as an IdP and how the server can be configured to use specific OAM Authentication Schemes to challenge the user. Caveats on Using WebLogic Server with JDK7 | JayJay Zheng Quick tech tips from Oracle ACE JayJay Zheng.

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  • does anyone know why apt-cacher-ng always downloading index file (Packages.gz) even though its exist on the apt-cacher-ng's cache?

    - by soekarmana
    just updated from 11.04 to 12.04, fresh install installed apt-cacher-ng and notice something strange about it its always downloading index file (Packages.gz) even though the file exist on the apt-cacher-ng's cache, so this is what exactly happened : on ubuntu 10.10 & 11.04 apt-cacher-ng installed & configured on my laptop, then i reload & install some packages after that i configure my friend's laptop with apt-cacher-ng proxy (192.168.1.1:3142), reloading repository was blazingly fast, finished in a second without using my Internet connection (checked on system monitor, total Received just 15kB) on ubuntu 11.10 & 12.04 apt-cacher-ng installed & configured on my laptop, then i reload & install some packages after that i configure my friend's laptop with apt-cacher-ng proxy (192.168.1.1:3142), reloading repository was really slow!, apt-cacher-ng redownload the index file from internet

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  • How to create a restricted SSH user for port forwarding?

    - by Lekensteyn
    ændrük suggested a reverse connection for getting an easy SSH connection with someone else (for remote help). For that to work, an additional user is needed to accept the connection. This user needs to be able to forward his port through the server (the server acts as proxy). How do I create a restricted user that can do nothing more than the above described? The new user must not be able to: execute shell commands access files or upload files to the server use the server as proxy (e.g. webproxy) access local services which were otherwise not publicly accessible due to a firewall kill the server Summarized, how do I create a restricted SSH user which is only able to connect to the SSH server without privileges, so I can connect through that connection with his computer?

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  • dhcp configuration not working ubuntu 11.10

    - by Vivek Pradhan
    I am usually behind a proxy server in college so I connect to the ethernet or wifi using manual IPv4 addresses only inside college. I have been trying really hard to get the internet work at home, there is no proxy and I have set the network to use automatic dhcp. It seems like it is not able to connect to the port, It gets disconnected after some time automatically and then tries to reconnect. The same thing is happening with wifi networks also, after some time i see a pop up asking for authentication and ultimately its not able to connect. What might be the problem here. I looked up some similar questions and checked the /etc/network/interfaces file and looks like this: auto lo iface lo inet loopback I have no idea what those lines mean but there is no configuration for eth0 or wlan0. Any help is deeply appreciated. Ubuntu loses it charms due to these small glitches.

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  • Proxied calls not working as expected

    - by AndyH
    I have been modifying an application to have a cleaner client/server split to allow for load splitting and resource sharing etc. Everything is written to an interface so it was easy to add a remoting layer to the interface using a proxy. Everything worked fine. The next phase was to add a caching layer to the interface and again this worked fine and speed was improved but not as much as I would have expected. On inspection it became very clear what was going on. I feel sure that this behavior has been seen many times before and there is probably a design pattern to solve the problem but it eludes me and I'm not even sure how to describe it. It is easiest explained with an example. Let's imagine the interface is interface IMyCode { List<IThing> getLots( List<String> ); IThing getOne( String id ); } The getLots() method calls getOne() and fills up the list before returning. The interface is implemented at the client which is proxied to a remoting client which then calls the remoting server which in turn calls the implementation at the server. At the client and the server layers there is also a cache. So we have :- Client interface | Client cache | Remote client | Remote server | Server cache | Server interface If we call getOne("A") at the client interface, the call is passed to the client cache which faults. This then calls the remote client which passes the call to the remote server. This then calls the server cache which also faults and so the call is eventually passed to the server interface which actually gets the IThing. In turn the server cache is filled and finally the client cache also. If getOne("A") is again called at the client interface the client cache has the data and it gets returned immediately. If a second client called getOne("B") it would fill the server cache with "B" as well as it's own client cache. Then, when the first client calls getOne("B") the client cache faults but the server cache has the data. This is all as one would expect and works well. Now lets call getLots( [ "C", "D" ] ). This works as you would expect by calling getOne() twice but there is a subtlety here. The call to getLots() cannot directly make use of the cache. Therefore the sequence is to call the client interface which in turn calls the remote client, then the remote server and eventually the server interface. This then calls getOne() to fill the list before returning. The problem is that the getOne() calls are being satisfied at the server when ideally they should be satisfied at the client. If you imagine that the client/server link is really slow then it becomes clear why the client call is more efficient than the server call once the client cache has the data. This example is contrived to illustrate the point. The more general problem is that you cannot just keep adding proxied layers to an interface and expect it to work as you would imagine. As soon as the call goes 'through' the proxy any subsequent calls are on the proxied side rather than 'self' side. Have I failed to learn or not learned something correctly? All this is implemented in Java and I haven't used EJBs. It seems that the example may be confusing. The problem is nothing to do with cache efficiencies. It is more to do with an illusion created by the use of proxies or AOP techniques in general. When you have an object whose class implements an interface there is an assumption that a call on that object might make further calls on that same object. For example, public String getInternalString() { return InetAddress.getLocalHost().toString(); } public String getString() { return getInternalString(); } If you get an object and call getString() the result depends where the code is running. If you add a remoting proxy to the class then the result could be different for calls to getString() and getInternalString() on the same object. This is because the initial call gets 'deproxied' before the actual method is called. I find this not only confusing but I wonder how I can control this behavior especially as the use of the proxy may be by a third party. The concept is fine but the practice is certainly not what I expected. Have I missed the point somewhere?

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  • Cannot authenticate without a password

    - by user70267
    This question has been asked hundreds of times before, but I did not see any relevant answer so I will repost. Sorry if there is any helpful answer, please don't vote down but please link to the question(s) with such answers. The problem can be reproduced as follows: When I remove the password of an administrator account, "Log In without Password", I cannot use that account to authenticate. When I do something that requires authentication, I cannot use an admin without a password to authenticate. If I leave the password box blank without a password while choosing a non-password admin, authentication fails (in terminal or in GUI). How to fix this problem?

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