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• Solaris 10 invalid ARP requests from 0.0.0.0? Link up/down every hour or 2

  - by JWD

  The guys at the data center where I'm hosting a server running Solaris 10 are telling me that my server is making a lot of invalid arp requests. This is an example of a portion of what was sent to me from the logs (with Mac addresses and IP addresses changed). [mymacaddress]/0.0.0.0/0000.0000.0000/[myipaddress]/[Datestamp]) It's being logged every hour. I don't see anything in the arp tables (arp -a) or routing tables (netstat -r) and I don't see anything relating to 0.0.0.0 when snoping the arp requests. The only place I see any reference to 0.0.0.0 is if I do netstat -a for the SCTP SCTP: Local Address Remote Address Swind Send-Q Rwind Recv-Q StrsI/O State ------------------------------- ------------------------------- ------ ------ ------ ------ ------- ----------- 0.0.0.0 0.0.0.0 0 0 102400 0 32/32 CLOSED But not really sure what that means. Doesn't seem like I can disable SCTP. There are some tunable SCTP parameters but it's not something I'm familiar with. Do I have to add changes to /etc/system? Looks like sctp_heartbeat_interval might be what I need to change? If it makes any difference, I have a few solaris zones running on this server, each with their own IP address on a virtual interface. eth0:0, eth0:1, etc. Does anyone have any idea what might be causing this and how to stop it? I think the switch I'm connected to doesn't like it and momentarily drops the connection. Is there anyway to at least block those requests using ipfilter or something else? Update: This was happening more frequently but now it seems to be happening roughly every hour or every two hours. It's not consistent. I tried setting setting the link speed and duplex to match the switch port and that seemed to make it stop happening for a few hours but then it started again.

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• Send keystrokes simultaneously to both host and slave over internet?

  - by donodarazao

  I would like to watch movies with a friend who lives far away from me. For this, the playback should be synchronized on both our pc. However, we have some constraints: Due to our low bandwidth internet, any form of streaming solution wouldn't work. We do however both have the same copy of the movie on our harddisks. We use movies to learn languages and because of this, we very frequently pause and rewind. The typical "3...2...1...go!" solution over skype wouldn't work because it would soon get out of sync. I imagine an approach that sends keystrokes simultaneously to both our pc would work (for example, if I press space to pause the movie at my pc, space should also be send to his pc). Any ideas how this could be realized? I looked into Synergy and InputDirector, but both neither seem to be an option, because I don't want to see the desktop of my friend, I want to see my desktop Keystrokes should be sent simultaneously to both pc, not just to one pc We have both Windows 7x64, and we might use any media player (VLC, XBMC,...).

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• Configure php mail() on Windows/IIS

  - by Adam Tuttle

  I have a Windows Server 2003 / IIS web server running various application servers, and ended up begrudgingly adding PHP into the mix. I know Win/IIS isn't the ideal environment for PHP, but it's what I've got and I need to make it work. From phpinfo(): Configuration File (php.ini) Path: C:\WINDOWS Loaded Configuration File: C:\php\php.ini From C:\php\php.ini: [mail function] ; For Win32 only. SMTP = localhost smtp_port = 25 ; For Win32 only. ;sendmail_from = [email protected] ; For Unix only. You may supply arguments as well (default: "sendmail -t -i"). ;sendmail_path = ; Force the addition of the specified parameters to be passed as extra parameters ; to the sendmail binary. These parameters will always replace the value of ; the 5th parameter to mail(), even in safe mode. ;mail.force_extra_parameters = Lastly, I have IIS setup to run an SMTP relay that allows connection and relay, but only from localhost. But when I try something that uses mail(), I get this error: The e-mail could not be sent. Possible reason: your host may have disabled the mail() function... Any ideas?

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• Is TortoiseSVN really this buggy?

  - by John Isaacks

  I have been using tortoise svn for a couple weeks now. I get errors very often. Almost everything I do creates an error. this is with repositories on the internet, locally on my machine or a machine on the network. So I started to keep track. Some examples are below. 12/31/2010 Can't move 'C:\Users\jisaacks\Desktop\my branch test.svn\tmp\entries' to 'C:\Users\jisaacks\Desktop\my branch test.svn\entries': The file or directory is corrupted and unreadable. 01/04/2011 Commit failed (details follow): Server sent unexpected return value (405 Method Not Allowed) in response to MKCOL request for '/svn/kranichs-svn/!svn/wrk/b316f15e-0869-4644-9c53-87aa0103506b/branches' 01/06/2011 Can't move 'C:\Users\jisaacks\Desktop\DVD Catalog\vendors.svn\tmp\entries' to 'C:\Users\jisaacks\Desktop\DVD Catalog\vendors.svn\entries': The file or directory is corrupted and unreadable. 01/06/2011 Can't move 'C:\Users\jisaacks\Desktop\DVD Catalog\cake\tests\test_app\views\layouts.svn\tmp\entries' to 'C:\Users\jisaacks\Desktop\DVD Catalog\cake\tests\test_app\views\layouts.svn\entries': The file or directory is corrupted and unreadable. 01/06/2011 Commit failed (details follow): attempt to write a readonly database attempt to write a readonly database That last one about the read only database happens every time I commit. Say if I am working on the head revision (7) in a working copy. I make a change and commit it. It gives me this error. But if I look at the log it tells me that there is now a revision 8 (the commit I just made) but I am still on revision 7. So I need to run update to be on the current revision that I just commited. I hope I explained that clearly. Anyways with all these errors I wonder.. Is TSVN just this unstable, does everyone have these issues. Or is it just me? If just me, what could I be doing wrong?

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• Bash Parallelization of CPU-intensive processes

  - by ehsanul

  tee forwards its stdin to every single file specified, while pee does the same, but for pipes. These programs send every single line of their stdin to each and every file/pipe specified. However, I was looking for a way to "load balance" the stdin to different pipes, so one line is sent to the first pipe, another line to the second, etc. It would also be nice if the stdout of the pipes are collected into one stream as well. The use case is simple parallelization of CPU intensive processes that work on a line-by-line basis. I was doing a sed on a 14GB file, and it could have run much faster if I could use multiple sed processes. The command was like this: pv infile | sed 's/something//' > outfile To parallelize, the best would be if GNU parallel would support this functionality like so (made up the --demux-stdin option): pv infile | parallel -u -j4 --demux-stdin "sed 's/something//'" > outfile However, there's no option like this and parallel always uses its stdin as arguments for the command it invokes, like xargs. So I tried this, but it's hopelessly slow, and it's clear why: pv infile | parallel -u -j4 "echo {} | sed 's/something//'" > outfile I just wanted to know if there's any other way to do this (short of coding it up myself). If there was a "load-balancing" tee (let's call it lee), I could do this: pv infile | lee >(sed 's/something//' >> outfile) >(sed 's/something//' >> outfile) >(sed 's/something//' >> outfile) >(sed 's/something//' >> outfile) Not pretty, so I'd definitely prefer something like the made up parallel version, but this would work too.

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• Vyatta internet connection + hosted site on same IP

  - by boburob

  Having a small issue setting up a vyatta. The company internet and two different websites are both on the same IP. Server 1 - Has websites hosted on ports 1000 and 3000 and also has a proxy server installed to provide internet connection to the domain Server 2 - Has a website hosted on ports 80 and 433 The vyatta is correctly natting the appropriate traffic to each server, and allowing the proxy to get internet traffic, however I have a problem getting to the websites hosted on these two servers inside the domain. I believe the problem is that the HTTP request is being sent with an IP, eg: 12.34.56.78. The request will reach the website and the server will attempt to send the request back to the IP, however this is the IP of the Vyatta, so it has nowhere else to go. I thought the solution would be something like this: rule 50 { destination { address 12.34.56.78 port 1000 } inbound-interface eth1 inside-address { address 10.19.2.3 } protocol tcp type destination } But this doesnt seem to do it! UPDATE I changed the rules to the following: rule 50 { destination { address 12.34.56.78 port 443 } outbound-interface eth1 protocol tcp source { address 10.19.2.3 } type masquerade } rule 51 { destination { address 12.34.56.78 port 443 } inbound-interface eth1 inside-address { address 10.19.2.2 } protocol tcp type destination } I am now seeing traffic going between the two with Wireshark, but the website will still fail to load.

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• Trouble with backslash characters and rsyslog writing to postgres

  - by Flimzy

  I have rsyslog 4.6.4 configured to write mail logs to a PostgreSQL database. It all works fine, until the log message contains a backslash, as in this example: Jun 12 11:37:46 dc5 postfix/smtp[26475]: Vk0nYDKdH3sI: to=<[email protected], relay=----.---[---.---.---.---]:25, delay=1.5, delays=0.77/0.07/0.3/0.35, dsn=4.3.0, status=deferred (host ----.---[199.85.216.241] said: 451 4.3.0 Error writing to file d:\pmta\spool\B\00000414, status = ERROR_DISK_FULL in "DATA" (in reply to end of DATA command)) The above is the log entry, as written to /var/log/mail.log. It is correct. The trouble is that the backslash characters in the file name are interpreted as escapes when sent to the following SQL recipe: $template dcdb, "SELECT rsyslog_insert(('%timereported:::date-rfc3339%'::TIMESTAMPTZ)::TIMESTAMP,'%msg:::escape-cc%'::TEXT,'%syslogtag%'::VARCHAR)",STDSQL :syslogtag, startswith, "postfix" :ompgsql:/var/run/postgresql,dc,root,;dcdb As a result, the rsyslog_insert() stored procedure gets the following value for as msg: Vk0nYDKdH3sI: to=<[email protected], relay=----.---[---.---.---.---]:25, delay=1.5, delays=0.77/0.07/0.3/0.35, dsn=4.3.0, status=deferred (host ----.---[199.85.216.241] said: 451 4.3.0 Error writing to file d:pmtaspoolB The \p, \s, \B and \0 in the file name are interpreted by PostgreSQL as literal p, s, and B followed by a NULL character, thus early-terminating the string. This behavior can be easiily confirmed with: dc=# SELECT 'd:\pmta\spool\B\00000414'; ?column? -------------- d:pmtaspoolB (1 row) dc=# Is there a way to correct this problem? Is there a way I'm not finding in the rsyslog docs to turn \ into \\?

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• Can't seem to stop Postfix backscatter

  - by Ian

  I've just migrated to a Postfix system and can't seem to stop the backscatter messages to unknown addresses on the site. I have a file, validrcpt, that lists all the valid emails on the site - about eight of them. Yet when a message is sent to a non-existent address, instead of just dropping it, postfix is replying with a "Recipient address rejected: User unknown in virtual mailbox table" email. Do I have something set wrong? I've read http://www.postfix.org/BACKSCATTER_README.html but unless I'm caffeine deficient, I don't see what's happening and perhaps I'm just to used to my old qmail setup. Here's postconf -n: alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases append_dot_mydomain = no biff = no broken_sasl_auth_clients = yes config_directory = /etc/postfix content_filter = smtp-amavis:[127.0.0.1]:10024 home_mailbox = Maildir/ inet_interfaces = all inet_protocols = ipv4 local_recipient_maps = hash:/etc/postfix/validrcpt mailbox_command = /usr/lib/dovecot/deliver -c /etc/dovecot/dovecot.conf -m "${EXTENSION}" mailbox_size_limit = 0 mydestination = localhost myhostname = localhost mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 myorigin = /etc/mailname policy-spf_time_limit = 3600s readme_directory = no recipient_bcc_maps = hash:/etc/postfix/recipient_bcc recipient_delimiter = + relay_recipient_maps = hash:/etc/postfix/relay_recipients relayhost = smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache smtp_use_tls = yes smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) smtpd_recipient_restrictions = permit_mynetworks,permit_sasl_authenticated,reject_unauth_destination,check_policy_service unix:private/policy-spf,reject_rbl_client zen.spamhaus.org,reject_rbl_client bl.spamcop.net,reject_rbl_client cbl.abuseat.org,check_policy_service inet:127.0.0.1:10023 smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination smtpd_sasl_auth_enable = yes smtpd_sasl_authenticated_header = yes smtpd_sasl_local_domain = $myhostname smtpd_sasl_path = private/dovecot-auth smtpd_sasl_security_options = noanonymous smtpd_sasl_type = dovecot smtpd_sender_restrictions = reject_unknown_sender_domain smtpd_tls_auth_only = yes smtpd_tls_cert_file = /etc/dovecot/dovecot.pem smtpd_tls_key_file = /etc/dovecot/private/dovecot.pem smtpd_tls_mandatory_ciphers = medium smtpd_tls_mandatory_protocols = SSLv3, TLSv1 smtpd_tls_received_header = yes smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtpd_use_tls = yes tls_random_source = dev:/dev/urandom virtual_gid_maps = static:5000 virtual_mailbox_base = /home/vmail virtual_mailbox_domains = digitalhit.com virtual_mailbox_maps = hash:/etc/postfix/vmaps virtual_minimum_uid = 1000 virtual_uid_maps = static:5000

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• Router not connecting to the internet

  - by Peter

  I had a weird problem this morning with my router - it's an Alice Gate VoIP 2 Plus WI-FI - not connecting to the internet after more or less 1 hour online (I'm always connected with the ethernet cable). The led status lights for Power, WI-FI, ADSL, Internet, Service should be on in order to be connected and navigate online. The problem was that the leds ADSL, Internet were off and I did not know why because it never happened before. I looked at the stats in the settings and the numbers for Bytes/Packages for both Sent/Received were there and increasing but I couldn't connect to the internet. I called tech support, they checked and told me to keep the router on for 48 hours because they were checking it. I've reset it twice before and after I called tech support and it still did not work so after about 2 hours of waiting I tried connecting using WI-FI and the leds 'magically' turned on, first the ADSL and Internet(Internet led always turns on last). At this point I'm curious what could of caused this and I'm doubting that the tech-support guys did something. What could of been the problem with the ethernet cable not connecting in the first place? It always works. What do the tech support guys normally do when they tell me to keep the router on so they can 'check it'? PS: I'm using ubuntu 32 bit

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• VPN Setup: Mac OS X and SonicWall

  - by noloader

  I'm trying to get VPN access up and running. The company has a SonicWall firewall/concentrator and I'm working on a Mac. I'm not sure of the SonicWall's hardware or software level. My MacBook Pro is OS X 10.8, x64, fully patched. The Mac Networking applet claims the remote server is not responding. The connection attempt subsequently fails: This is utter bullshit, as a Wireshark trace shows the Protected Mode negotiation, and then the fallback to Quick Mode: I have two questions (1) does Mac OS X VPN work in real life? (2) Are there any trustworthy (non-Apple) tools to test and diagnose the connection problem (Wireshark is a cannon and I have to interpret the results)? And a third question (off topic): what is broken in Cupertino such that so much broken software gets past their QA department? EDIT (12/14/2012): The network guy sent me "VPN Configuration Guide" (Equinox document SonicOS_Standard-6-EN). It seems an IPSec VPN now requires a Firewall Unique Identifier. Just to be sure, I revisited RFC 2409, where Main Mode, Aggressive Mode, and Quick Mode are discussed. I cannot find a reference to Firewall Unique Identifier. I think I am screwed here: I am trying to connect to a broken (non-standard) firewall, with a broken Mac OS X client. Fortunately, I can purchase VPN Tracker Personal (a {SonicWall|Equinox}-authored client) for $129US from Equinox. So much for standards....

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• Sign multiple domains with single Domain Key (dk-filter)

  - by Lashae

  Motivation The private shopping website GILT, send periodical update emails from giltgroupe.bounce.ed10.net however all of the mails are signed with domain keys of giltgroupe.com. mailed-by giltgroupe.bounce.ed10.net signed-by giltgroupe.com My Story I couldn't manage to sign x.com with y.com 's domain key using dk-filter under Debian Lenny with postfix. If I try to init dk-filter service with following arguments: DAEMON_OPTS="$DAEMON_OPTS -d x.com,y.com -c nofws -k -i /var/dk-filter/internal_hosts -s /etc/dk-keys.conf" dk-filter service signs with domain x.com (d=x.com) If I change the daemon arg.s as following: DAEMON_OPTS="$DAEMON_OPTS -d x.com -c nofws -k -i /var/dk-filter/internal_hosts -s /etc/dk-keys.conf" then emails sent From y.com is not being signed. the dk-keys.conf file is as follows: *:/var/dk-filter/y.com/mail I managed to do same thing with DKIM, works perfect. However DK doesn't seem to work. I don't have any problem signing y.com's emails with y.com's key and x.com's emails x.com's key, which indicates there is no configuration problem. Do you have any experience/advice to make it possible to sign emails from multiple domains by a specific chosen domain?

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• How do I identify Blackberry / OWA users in my IIS logs?

  - by Quinten

  We just rolled out a Blackberry Express Server, and would like to make sure that all Blackberry devices that our users own are connecting SOLELY through the BES server. We are running Exchange 2010 SP1. I've read some links that discuss blocking BIS at the firewall level. Before doing that, however, I'd like to individually contact all users with Blackberries and make sure that they have a chance to switch to the BES server. I've sent a company-wide email, but unsurprisingly folks tend to tune these out until they are forced into action. Is there an easy way to identify the users with Blackberries by searching IIS logs, or perhaps using the Exchange Management Shell? Especially some automated way? I've tried searching for the Blackberry identifier, but it does not appear next to any user name, so it's not as helpful as it could be. Edit: to clarify, what I'm talking about is the fact that Blackberries can use OWA to download mail to the phone. We do not allow IMAP or POP access through our firewall so that's not a concern--just folks with Blackberries using Blackberry's hack to allow it to connect to Exchange without a BES server. As far as I know, Blackberries are the only popular phones that use this method to download mail.

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• IIS SMTP server (Installed on local server) in parallel to Google Apps

  - by shaharru

  I am currently using free version of Google Apps for hosting my email.It works great for my official mails my email on Google is [email protected]. In addition I'm sending out high volume mails (registrations, forgotten passwords, newsletters etc) from the website (www.mydomain.com) using IIS SMTP installed on my windows machine. These emails are sent from [email protected] My problem is that when I send email from the website using IIS SMTP to a mail address [email protected] I don’t receive the email to Google apps. (I only receive these emails if I install a pop service on the server with the [email protected] email box). It seems that the IIS SMTP is ignoring the domain MX records and just delivers these emails to my local server. Here are my DNS records for domain.com: mydomain.com A 82.80.200.20 3600s mydomain.com TXT v=spf1 ip4: 82.80.200.20 a mx ptr include:aspmx.googlemail.com ~all mydomain.com MX preference: 10 exchange: aspmx2.googlemail.com 3600s mydomain.com MX preference: 10 exchange: aspmx3.googlemail.com 3600s mydomain.com MX preference: 10 exchange: aspmx4.googlemail.com 3600s mydomain.com MX preference: 10 exchange: aspmx5.googlemail.com 3600s mydomain.com MX preference: 1 exchange: aspmx.l.google.com 3600s mydomain.com MX preference: 5 exchange: alt1.aspmx.l.google.com 3600s mydomain.com MX preference: 5 exchange: alt2.aspmx.l.google.com 3600s Please help! Thanks.

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• SMTP message rate control on Ubuntu 8.04, preferably with postfix

  - by TimDaMan

  Maybe I am chasing a bug but I am trying to set up a smtp proxy of sorts. I have a postfix server which receives all the email for a collection of servers/clients. It them uses a smarthost (relayhost=...) to forward it's mail to our corporate MTA. I would like to limit the number of messages an individual server can relay to prevent swamping the corporate MTA. Postfix has a program called "anvil" that is capable of tracking stats about mail to be used for such things but it doesn't seem to be executed. I ran "inotifywait -m /usr/lib/postfix/anvil" while I started postfix and sent a number of messages through it from a remote server. inotifywait indicated anvil was never run. Anyone gotten postfix/anvil rate controls to work? main.cf smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) biff = no append_dot_mydomain = no readme_directory = no myhostname = site-server-q9 alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases myorigin = /etc/mailname mydestination = localhost relayhost = Out outgoing mail relay mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 10.0.0.0/8 mailbox_size_limit = 0 recipient_delimiter = + inet_interfaces = 10.X.X.X smtpd_client_message_rate_limit = 1 anvil_rate_time_unit = 1h master.cf extract anvil unix - - - - 1 anvil smtp inet n - - - - smtpd

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• Is execution of sync(8) still required before shutting down linux?

  - by Amos Shapira

  I still see people recommend use of "sync; sync; sync; sleep 30; halt" incantations when talking about shutting down or rebooting Linux. I've been running Linux since its inception and although this was the recommended procedure in the BSD 4.2/4.3 and SunOS 4 days, I can't recall that I had to do that for at least the last ten years, during which I probably went through shutdown/reboot of Linux maybe thousands of times. I suspect that this is an anachronism since the days that the kernel couldn't unmount and sync the root filesystem and other critical filesystems required even during single-user mode (e.g. /tmp), and therefore it was necessary to tell it explicitly to flush as much data as it can to disk. These days, without finding the relevant code in the kernel source yet (digging through http://lxr.linux.no and google), I suspect that the kernel is smart enough to cleanly unmount even the root filesystem and the filesystem is smart enough to effectively do a sync(2) before unmounting itself during a normal "shutdown"/"reboot"/"poweorff". The "sync; sync; sync" is only necessary in extreme cases where the filesystem won't unmount cleanly (e.g. physical disk failure) or the system is in a state that only forcing a direct reboot(8) will get it out of its freeze (e.g. the load is too high to let it schedule the shutdown command). I also never do the "sync" procedure before unmounting removable devices, and never hit a problem. Another example - Xen allows the DomU to be sent a "shutdown" command from the Dom0, this is considered a "clean shutdown" without anyone having to login and type the magical "sync; sync; sync" first. Am I right or was I lucky for a few thousands of system shutdowns?

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• Online computer not responding to pings

  - by mastercork889

  I was doing a bit of scanning on my network lately, knew all the hostnames to each computer connected. But whilst pinging one of them ping returned Request timed out.. This is strange as I know the computer is online and that the computer responds correctly to pinging on a different (enterprise) network. Is there something on the computer, my network, or my computer that is bugging with this? - That's just a sub-question, I don't expect this to be the main answer. The real question: Why does this happen? Why does pinging the IP4 address not work? EDIT : Pinging the Hostname used to default to the IP4 address, but now it defaults to the IP6 address. Why does this happen? But now that it pings using IP6, how come it all of a sudden works? > ping -6 THE_COMPUTER Pinging THE_COMPUTER [lengthy IP6 address] with 32 bytes of data: Reply from [lengthy IP6 address]: time=1ms Reply from [lengthy IP6 address]: time=1ms Reply from [lengthy IP6 address]: time=1ms Reply from [lengthy IP6 address]: time=1ms Ping stats: Sent = 4, Recieved = 4, Lost = 0 (0% loss) But when this is done using IP4 it doesn't work. So there are now two questions: How come IP6 works and not IP4? Why does IP4 not work?

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• Share Firefox/Thnderbird data between W7 and Linux Mint 12 in dual boot computer

  - by Albert

  I've just set up my laptop (where I had running only W7) with a dual boot to run Linux Mint 12 as well. I have a "Data" partition (apart from the required partitions for W7 and Linux) where I store pretty much everything that isn't software installations (music, videos, project files, etc). I seem to be able to access that NTFS partition totally fine from Mint (like I've always done with W7), which is cool because I can access all that stuff regardless of which OS I'm using. I would like to know if it's possible (and how) to go one step further and share programs data between the two OS. One example would be my Firefox and Thunderbird data. For example, in Firefox share my bookmarks (and if I could share history, autocomplete and all that stuff, that would be awesome). In thunderbird, be able to share my mail and configuration, seeing the same inbox, folders, message rules, etc... So if I receive/send an email from W7 and later switch to Mint, I can see that email as it had been received/sent from Mint, and vice versa. Is this even possible? Or am I asking for too much convenience? If it's possible, any clues on how to set it all up?

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• why i cannot download jdk from oracle web site directly without AuthParam?

  - by hugemeow

  that is download with the following command, why it fails to download that file? wget http://download.oracle.com/otn-pub/java/jdk/6u35-b10/jdk-6u35-linux-i586.bin the following command works, but that AuthParam may not work after a while, why? wget http://download.oracle.com/otn-pub/java/jdk/6u35-b10/jdk-6u35-linux-i586.bin?AuthParam=1346955572_27e44512fe8ef5cb920c4c329e5f0fd8 how this AuthParam option is implemented? why i cannot download without this parameter? and why i can only get this parameter using explorer? is rewrite used in the oracle server when deal with wget request? why the same command not works after an hour, does the value of AuthParam expired? so how the server check whether the value of AuthParam is expired? wget http://download.oracle.com/otn-pub/java/jdk/6u35-b10/jdk-6u35-linux-i586.bin?AuthParam=1346955572_27e44512fe8ef5cb920c4c329e5f0fd8 --2012-09-07 03:51:01-- http://download.oracle.com/otn-pub/java/jdk/6u35-b10/jdk-6u35-linux-i586.bin?AuthParam=1346955572_27e44512fe8ef5cb920c4c329e5f0fd8 Resolving download.oracle.com... 23.67.251.50, 23.67.251.57 Connecting to download.oracle.com|23.67.251.50|:80... connected. HTTP request sent, awaiting response... 403 Forbidden 2012-09-07 03:51:01 ERROR 403: Forbidden. @KJ-SRS is that kind of CGI program which is used to judge if AuthParam is right? is that possible to download jdk package purely using wget command, and no need to get that AuthParam in explorer

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• IPtables - Accept Arbitrary Packets

  - by Asad Moeen

  I've achieved a lot on blocking attacks on GameServers but I'm stuck on something. I've blocked major requests of game-server which it aceepts in the form "\xff\xff\xff\xff" which can be followed by the actual queries like get status or get info to make something like "\xff\xff\xff\xff getstatus " but I see other queries if sent to the game-server will cause it to reply with a "disconnect" packet with the same rate as input so if the input rate is high then the high output of "disconnect" might give lag to the server. Hence I want to block all queries except the ones actual clients use which I suppose are in the form "\xff\xff\xff\xff" or .... so, I tried using this rule : -A INPUT -p udp -m udp -m u32 ! --u32 0x1c=0xffffffff -j ACCEPT -A INPUT -p udp -m udp -m recent --set --name Total --rsource -A INPUT -p udp -m udp -m recent --update --seconds 1 --hitcount 20 --name Total --rsource -j DROP Now where the rule does accept the clients but it only blocks requests in the form "\xff\xff\xff\xff getstatus " ( by which GameServer replies with status ) and not just "getstatus " ( by which GameServer replies with disconnect packet ). So I suppose the accept rule is accepting the simple "string" as well. I actually want it to also block the non-(\xff) queries. So how do I modify the rule?

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• How can visiting a webpage infect your computer?

  - by Cybis

  My mother's computer recently became infected with some sort of rootkit. It began when she received an email from a close friend asking her to check out some sort of webpage. I never saw it, but my mother said it was just a blog of some sort, nothing interesting. A few days later, my mother signed in on the PayPal homepage. PayPal gave some sort of security notice which stated that to prevent fraud, they needed some additional personal information. Among some of the more normal information (name, address, etc.), they asked for her SSN and bank PIN! She refused to submit that information and complained to PayPal that they shouldn't ask for it. PayPal said they would never ask for such information and that it wasn't their webpage. There was no such "security notice" when she logged in from a different computer, only from hers. It wasn't a phishing attempt or redirection of some sort, IE clearly showed an SSL connection to https://www.paypal.com/ She remembered that strange email and asked her friend about it - the friend never sent it! Obviously, something on her computer was intercepting the PayPal homepage and that email was the only other strange thing to happen recently. She entrusted me to fix everything. I nuked the computer from orbit since it was the only way to be sure (i.e., reformatted her hard drive and did a clean install). That seemed to work fine. But that got me wondering... my mother didn't download and run anything. There were no weird ActiveX controls running (she's not computer illiterate and knows not to install them), and she only uses webmail (i.e., no Outlook vulnerability). When I think webpages, I think content presentation - JavaScript, HTML, and maybe some Flash. How could that possibly install and execute arbitrary software on your computer? It seems kinda weird/stupid that such vulnerabilities exist.

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• Setup Firefox to save .pages as .zip automatically

  - by Mike Dtrick

  What do I want to do? I would like Firefox to save files with the .pages extension as .zip files automatically. Scenario You are browsing through your emails and you notice your friend just sent you an email with a file attached (a .pages in this example). Unfortunately, you have a laptop that runs Windows. Your friend continues to send tons of emails with .pages files attached and you are tired of manually saving the files as a .zip file. Ultimately, you would like Firefox to be set up so that the download/file manager recognizes the .pages extension and automatically converts it to a .zip file. What have I done? I have saved files manually by selecting save as "All Files" and setting the extension to .zip. I've gone through Firefox and their documentation and have not found anything on how to complete this task. Why am I doing this? To save time (only a few seconds, not the main reason). I would like to setup a simple solution that "converts" a file automatically without having to recall steps on how to achieve the task manually (for clients who aren't exactly tech savvy). So that clients with Windows can access the files. IMPORTANT NOTE: I am not trying to save the web page, rather an Apple document equivalent to Microsoft Word. UPDATE: The really easy method would be to save one file, right click it, choose properties and open all .pages files up with WinRAR (or any other program that extracts files from a compressed folder). For the sake of learning, I am going to "neglect" this method and continue to do some research on Firefox add-ons. I would still like to have Firefox or the download manager to do the bulk of the work for converting the file.

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• Show full URI/URL in Chrome's developer tools Network tab

  - by Lev

  When using Chrome to debug, I find it incredibly difficult to be efficient due to the fact that I don't see how I can force the "Network" tab of the developer tools to show the full request URI. It will show the full URI if you hover the link and wait a second, but this is incredibly counterproductive. All of my AJAX requests are sent to ajax.php, and handled by using query string arguments, like: ajax.php?do=profile-set ajax.php?do=game-save ... etc. Since I use AJAX extensively, my network tab is filled with "ajax.php", but I have to manually hover each and every entry to find the request I am looking for. Surely there has got to be another way!? I am constantly fed up by something new in Firefox and immediately force myself back into Chrome, but it is always the developer tools in Chrome that keep me from using it for an extended period of time. Hopefully I can find out how to do this so I can continue using Chrome as my numero uno. I've provided a screen shot to show you where I mean:

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• Small TCP Window on WAN between 2 Locations

  - by Brent

  Site A: Denver datacenter. 60MBPS. Site B: Chicago. 100MBPS. ICMP pings: Packets: Sent = 176, Received = 176, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 74ms, Maximum = 94ms, Average = 75ms File transfer between sites that never goes past ~7MBPS: Windows Update download at 60MBPS+: Site to site: IPSec VPN using two Cisco 5520's. CPU at 3-4% and lots of memory to spare. The latency between to two sites is very acceptable so I can't see an issue why it is performing so slow when transferring between the two sites. I have found that any type of transfer (FTP, HTTP, Windows file shares) will never go above ~7MBPS. When the WAN was first setup, I was able to get transfers at 50-60MBPS, which is what is expected due to the WAN connection at the Site A at 60MBPS. Then a few days later, I was not able to get anything going faster than ~7MBPS. Is there a upstream router between Denver and Chicago causing this? I want to take the blame away from our setup as downloads from Windows Update go blazing fast and for the first few days after the site to site VPN came up, I was transferring VM images at 50-60MBPS. Our stack: HP P2000 MSA - HP C7000 Chassis - HP Flex-10 - Cisco Gigabit switch - Cisco ASA - WAN

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• Simplest DNS solution for remote offices

  - by dunxd

  I look after a bunch of remote offices that connect via VPN - a Cisco ASA 5505 in each office acts as Firewall and VPN end point. Beyond that we keep things as simple as possible in the offices to minimise the support burden. We don't have any kind of server except in offices large enough to justify having someone dedicated to IT. Basically there is the ASA, some computers, a network printer and a switch. One of the problems I am seeing in a lot of offices is that DNS requests looking up hosts inside our network often fail - I'm assuming timeouts due to the offices internet connection (they are all in developing world countries) having some sub-optimal qualities (e.g. high latency caused by VSAT segments, or packet loss. The obvious solution to this is to have some sort of local DNS service that can serve local requests - so I think it would need to do zone transfers from our Microsoft Windows 2008 R2 DNS servers at HQ. However, simply installing Windows Servers in each office is both expensive, and creates a support burden. This got me thinking about pfsense/m0n0wall on embedded devices - those can act as a DNS server, and could be configured at HQ and sent out as just something that needs to be plugged into the network and can then be forgotten about by the staff locally. Maybe there are some alternatives to the ASA 5505 that include some DNS functionality. Has anyone here dealt with the problem, either using some kind of embedded device, or found some other solution? Any gotchas or reasons to avoid what I have suggested?

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• FastCGI on lighttpd no data received

  - by Michael Sh

  I have a simple FastCGI script: public static void main (String args[]) { int count = 0; while(new FCGIInterface().FCGIaccept()>= 0) { count ++; System.out.println("Content-type: text/html\n\n"); System.out.println("<html>"); System.out.println( "<head><TITLE>FastCGI-Hello Java stdio</TITLE></head>"); System.out.println("<body>"); System.out.println("<H3>FastCGI Hello Java stdio</H3>"); System.out.println("request number " + count + " running on host " + System.getProperty("SERVER_NAME")); System.out.println("</body>"); System.out.println("</html>"); } } Set up with lighttpd as: server.modules += ( "mod_fastcgi" ) fastcgi.debug = 1 fastcgi.server = ( "/cgi" => ( "fastcgi" => ("port" => 8888, "host" => "127.0.0.1", "bin-path" => "/var/www/tiny.fcgi", "min-procs" => 1, "max-procs" => 1, "check-local" => "disable" )) ) In the log: 2012-11-24 04:35:04: (mod_fastcgi.c.1367) --- fastcgi spawning local proc: /var/www/tiny.fcgi port: 54321 socket max-procs: 1 2012-11-24 04:35:04: (mod_fastcgi.c.1391) --- fastcgi spawning port: 54321 socket current: 0 / 1 2012-11-24 04:35:39: (mod_fastcgi.c.3061) got proc: pid: 0 socket: tcp:127.0.0.1:54321 load: 1 The problem is that there is no data being sent from the server to browser. Am I missing something here?

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