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• Wpa supplicant suddenly stopped working

  - by Grzenio

  Hi, Recently my wireless stopped working on my Debian testing system. It just doesn't connect. The best I get (only after a reboot) is that it says it did connect, but failed to get IP address. But usually it just tries to connect, disconnects straight away, connects again etc. so it never manages to associate correctly. I am sure it did work about a month ago, stopped working after recent upgrades from the repository. Any ideas how to find the issue and fix it?

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• Cannot connect to a VPN server - authentication failed with error code 691

  - by stacker

  When trying to connect to a VPN server, I get the 691 error code on the client, which say: Error Description: 691: The remote connection was denied because the user name and password combination you provided is not recognized, or the selected authentication protocol is not permitted on the remote access server. Now, I validated that the username and password are correct, and tried to login with domain name and without. I also installed a certification to use with the IKEv2 security type. I also validated that the VPN server support security method. But I cannot login. In the server log I get this log: Network Policy Server denied access to a user. The user DomainName\UserName connected from IP address but failed an authentication attempt due to the following reason: The remote connection was denied because the user name and password combination you provided is not recognized, or the selected authentication protocol is not permitted on the remote access server. Any idea of what can I do? Thanks in advance!

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• Web service not accessible from behind corporates firewalls - how come?

  - by Niro

  We run a Saas serving a widget which is embedded in customer websites. The service include static javascript code hosted on amazon S3 and dynamic part hosted on EC2 with Scalr (using scalr name servers). We received some feedback from users behind corporate firewalls that they cant access our service (while they can access the sites including the widget). This does not make sense to me since the service is using normal http calls on port 80 and our URL is quite new without any reason to be banned by firewalls. My questions are: 1. Why is the service is not accessible and what can I do about it? 2. Is it possible that one of the following is blocked by corporate firewalls: Amazon s3, the dynamic IP address provided by amazon, Scalr name servers. Any other possible reasons, way to check them and remedies for this? Thanks!

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• Cisco, How to do a subnetting scheme using VLSM and RIP-2?

  - by Andrei T. Ursan

  I'm studying for my CCNA exam and I have to create a VLSM scheme using RIP-2 for the following requirements: (this is an exercise) Use the class C network 192.168.1.0 network for your point-to-point connections Using the Class A network 10.0.0.0, plan for the following number of hosts in each location: New York: 1000 Chicago: 500 Los Angeles: 1000 On the LAN and point-to-point connections, select subnet masks that use the smallest ranges of IP addresses possible given the above requirements. In all cases, use the lowest possible subnet numbers. Subnet zero is allowed. My guess is the following: New York: S0/0 192.168.1.1 /24 Fa0/0 10.1.0.1 netmask 255.255.248.0 - because we need 1000 hosts Chicago: S0/0 192.168.1.2 /24 Fa0/0 10.2.0.1 netmask 255.255.252.0 (for 500 hosts) Los Angeles: S0/0 192.168.2.3 /24 Fa0/0 10.3.0.1 netmask 255.255.248.0 (for 1000 hosts) Is this a good configuration? I'm reading the CCNA book but not everything is very clear, so I said to do some exercises... Thank you!

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• How to use ssl_verify_client=ON on one virtual server and ssl_verify_client=OFF on another?

  - by Alexander Artemenko

  I want to force ssl client verification for on of my virtual hosts. But get "No required SSL certificate was sent" error, trying to GET something from it. Here are my test configs: # defaults ssl_certificate /etc/certs/server.cer; ssl_certificate_key /etc/certs/privkey-server.pem; ssl_client_certificate /etc/certs/allcas.pem; server { listen 1443 ssl; server_name server1.example.com; root /tmp/root/server1; ssl_verify_client off; } server { listen 1443 ssl; server_name server2.example.com; root /tmp/root/server2; ssl_verify_client on; } First server replies with 200 http code, but second returns "400 Bad Request, No required SSL certificate was sent, nginx/1.0.4". Probably, it is implossible to use ssl_verify_client on the same IP? Should I bind these servers to different IPs, will it solve my problem?

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• VM can't connect to outside in bridged mode

  - by Kamal

  Hi Guys, I am not able to ping any machine(not even the host) from Guest VM in bridged mode. But I got an IP which is on the same subnet as host. I can ping my guest VM from the host and can use ssh to connect to the guest. I am using Vmware workstation 6.5. Guest VM is a centos VM and host is windows xp. Every thing works fine in NAT mode. Any clues as to what could be happening. I tried disabling all the firewalls I have.

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• Sendmail relay out of Amazon EC2?

  - by Stephen Belanger

  I have a site running on CentOS 5.4 through Amazon EC2. Unfortunately, Amazon has had nothing but trouble with their entire IP range getting black listed from spam tracking services regularly. I need a mail server, so I setup an smtp server elsewhere that I want to send to, but I can't just send directly to it through PHP because the direct smtp request is way too slow. What I want to do is relay through sendmail, but I've never used sendmail before, so I have no idea how to configure it. All I want is for all emails sent from localhost to be relayed to one specific external server, but I don't know how to do that. I tried to find a tutorial online, but couldn't find anything that was particularly clear as to how I go about doing that. Can anyone help me out?

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• 10 gigabit or 1 gigabit switch

  - by Guntis

  We are planning to move mysql to dedicated box. At this moment we have web servers and mysql is running on each. Question is: cheaper is to buy 10G switch and put 10G network card into mysql server. Or buy normal gigabit switch and connect mysql box to switch with multiple network cables. In 1G scenario then we give each web server different mysql IP address. I don't think, that mysql box with one 1G link is enough to to satisfy multiple web box mysql traffic. At this moment we have 3 servers witch are running mysql/web. Plan is to add fourth server for mysql only. Thanks. Edit: if we buy 1G switch with mini-GBIC ports. Can we put in mini-GBIC 10G connectors and then connect mysql box to that port?

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• Making internal website available publicly (Win 2008 Server)

  - by endigo

  I have an IIS 7 web site that is running on a Windows 2008 Server (64-bit) VMWare on a Windows 2008 Server (64-bit) Host on my local network. My router is a Firebox XEdge and it has port 80 directed to the IP of the server on VMWare. I can reach the web site from inside the network, but I cannot reach the site from outside the network. I have other web sites that are working through the Firebox, and I am confident that it is configured correctly. I suspect that Windows 2008 server is blocking routed or public addresses, but I have shut down the firewall on the Server that is running on VMWare and the AVG Anti-virus to no avail. How can I make my site available publicly.

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• Exchange Server 2010 ActiveSync SSL Certificate Problem

  - by Cell-o

  Hi All, We have a problem related Exchange Server 2010 Activesync.My problem is;When I connecting to activesync from outside, I am receiving the following error. ExRCA is testing Exchange ActiveSync. The Exchange ActiveSync test failed. Test Steps Attempting to resolve the host name mail.xxxxx.com in DNS. The host name resolved successfully. Additional Details IP addresses returned: xx.0.x3.4 Testing TCP port 443 on host mail.x.com to ensure it's listening and open. The port was opened successfully. Testing the SSL certificate to make sure it's valid. The SSL certificate failed one or more certificate validation checks. Test Steps Validating the certificate name. Certificate name validation failed. Tell me more about this issue and how to resolve it Additional Details Host name mail.x.com doesn't match any name found on the server certificate CN=xxxxxx. Thanks in advance all your help.

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• unusual webpage access problem

  - by user28163

  This is one of the weirdest problems I've ever seen and I'm out of ideas. I cannot access a couple of websites from my home pc (for 3-4 days now), or at least they go really really slow ~700b/s I can access these same websites fine from my laptop from same IP address. - The websites originate from different countries and are huge popular sites. - I have tried both my PC's network cards. - I have reformatted my PC. - I have reset my router to factory settings. - I have created virtual computers on my PC, and from inside those I cannot access the webpages. - I have flushed my dns. - I tried specifying my dns server addresses to 8.8.8.8 and 8.8.4.4. I can only access the webpages using my PC, if I first connect to an outside VPN. Again, these sites work fine on the 2 other pcs in this house (same ISP and internet connection). help plz :)

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• Wired and wireless conections: force Windows to connect to laptop through Ethernet?

  - by danielkza

  I have a desktop connected to the internet and to my home network through Wi-Fi, and a latptop connected to said desktop through an Ethernet cable. But Windows seems to only reach the laptop through Wi-Fi: I want to transfer files through the wired connection instead. Setting up Internet Connectin Sharing and disconnecting the laptop from Wi-Fi altogether doesn't seem like the most elegant solution to me. I also thought about going to the hosts file and setting up the IP address manually, but that would make the laptop completely unavailable if it's not wired, which happens quite often unfortunately. Is there any way for me to tell Windows to use the wired connection for a particular host if possible, and fallback to any other route it finds otherwise?

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• PTR Record for host in VLSM subnet

  - by paradroid

  I understand that this is the way a PTR record would be made on a Class A subnet (10.100.250.100 255.0.0.0) dnscmd /RecordAdd 10.in-addr.arpa. 100.250.100 PTR host.domain.tld To clarify the syntax, this is what it should be for a Class C subnet (192.168.1.100 255.255.255.0) dnscmd /RecordAdd 1.168.192.in-addr.arpa. 100 PTR host.domain.tld Is that right? Now how do I do this for a host with the IP address 172.31.111.210 on a 172.31.111.192/26 network? I'm not sure how to do this with a classless subnet mask.

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• iptables -L lags on non localhost or anywhere address

  - by DazSlayer

  I am trying to configure iptables for ubuntu 10.04 and I have a problem with iptables -L lagging on rows where the destination or source address is not localhost or anywhere. The following entries will cause lag on their row: iptables -A INPUT -p tcp --dport 111 -s 192.168.1.14 -j ACCEPT iptables -A INPUT -p tcp --dport 90 -d 192.168.1.14 -j ACCEPT while this does not: iptables -A INPUT -p tcp --dport localhost -s 192.168.1.14 -j ACCEPT iptables -A INPUT -p tcp --dport localhost -d 192.168.1.14 -j ACCEPT I feel like this might be due to iptables checking to see if the ip is reachable. If not, what is the cause, if it is how can I disable it?

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• Plesk 9 VPS - Doesn't reply to NameServer requests (nslookup, etc)

  - by Ben

  Hi, I'm trying to troubleshoot a problem with a new VPS i'm setting up. The VPS is running Plesk 9 on a CentOS 5 system. Everything works fine, except it doesn't serve dns requests. If I try something like nslookup [somedomain.com] the.ser.ver.ip to test a DNS query, i get the following error ;; connection timed out; no servers could be reached I can't telnet to it on port 42 either.. I'm guessing something is blocking the requests.. firewall maybe? the plesk firewall module is installed and the nameservers entry is green. Any other way I can check what's blocking it on the server? Any help/tip greatly appreciated. Note: http works, i can telnet to the server on port 80 and i can also ping the server Thanks

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• I can access \\server via explorer but a program wont

  - by Michael Savage

  From ServerA I can access \\ServerB\Telephony\Files\abcdefgh.pdf using windows explorer. From the same ServerA when I try to access the same file on ServerB using a program (a program that imports files from csv file) I get "File Not Found" error. On \\ServerB\Telephony\ the Share is on and I added the service account that I used to log in to ServerA. I am clueless. Please suggest. (oh, it's a Windows 2008 R2 Server) (btw, I did try IP Address, FQDN but works with Explorer but CVS Importer wont read the path. At one time, I did get Access Denied but I dont get access denied anymore after adding the service account to the share. firewalls are off on the servers) Update: I go to My Computer Network I see many servers but ServerB is not in the list..

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• how to run an AFS file server on a specific ethernet card (in Debian)

  - by listboss

  I have a linux box running Debian server with minimal number of packages (so no GUI for network management). The box has two ethernet cards, one of which (eth0) is connected to a Mac OSX computer using a cross-cable. I can bring up eth0 and assign a static ip (10.10.11.16) to it. This way I can ssh to the box through the cross-cable. This is what I run on Linux box: ifconfig eth0 10.10.11.16 netmask 255.255.255.0 up I also installed/started a file server (AFS) on Debian. So far, the file server can only be accessed through eth1 which is exposed to my home LAN and www. My goal is to set up the file server so that it's only visible through eth0. Is this possible? and if yes, how can I do it?

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• Connect to development server via switch?

  - by letseatfood

  I apologize upfront if this isn't appropriate for superuser. I asked it on serverfault and was told it was too general for that site. I have a laptop with Vista and it receives it's internet connection wireless. I have an old desktop with Ubuntu 10.04 Server Edition installed and it is setup as a development server with Apache, MySQL, and PHP. This works well, with the server having a static IP address. The server is connected to the router via an Ethernet cable. Is it possible to disconnect the cable that is currently connecting the server and the router, then connect the server and workstation to a switch, so that I am still able to connect to the server via web browser from the workstation? I am trying to eliminate the long ethernet cable connecting the server to the router in the other room. I already have a switch, that is why I asked specifically about it. Thanks and I will be more than happy to clarify!

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• How to make a DHCP server on virtual machine serves other virtual machines(on different physical machines)?

  - by Tony

  I'm building a virtual cluster with VirtualBox and Opensuse. I have 10 physical machines and need several vms on each. The virtual machines are supposed to be in a "private" network, but still have internet access. I was asked to set up a virtual head node working as DHCP server. I installed DHCP server on the virtual head node and it seems works. On VirtualBox I set 2 network adapters to the head node, one bridged adapter and one internal network. One vm on the same physical machine has been set nic as internal network adapter. The vm can get IP address (so DHCP works) but can't access internet. What should I do? Specifically, what network adapter should I choose for head-node and work-nodes in VirtualBox? What in the virtual machines should I do?

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• Sharepoint database connection issue after upgrade to SQL Server 2008 R2

  - by Neil Hoff

  I took a backup of all our Sharepoint WSS 3.0 databases and restored them to a new Windows 2008 R2 server. The new SQL server has the same name and IP address as the old one. The only difference between the two is the new one has SQL 2008 R2 and the old one has SQL 2005. When I navigate to the sharepoint url I get this error: Cannot connect to the configuration database. I checked the logs at this location: "%commonprogramfiles%/Microsoft Shared/web server extensions/12/Logs" and found this error: System.Data.SqlClient.SqlException: Login failed. The login is from an untrusted domain and cannot be used with Windows authentication. Any ideas?

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• Suggestions for a SOHO/Home Asterisk system

  - by James

  I would like to buy a small embedded system that runs Linux and Asterisk. I would like two FXS ports ( to plug analogue phones into ) and one FXO port ( to plug in to my real line to allow access to the POTS ). I would like it to have a USB port to hold storage for voicemail. I really want it for home use so I would like it to be under £150 ( say $250 ), given that you can buy ADSL routers for around this much can any of them be made to run Linux and Asterisk? I don't want a PC as the power usage would be too high. I am looking for something like this ASDL router but open and able to run Asterisk or another open PBX. At worst I would like a box which had one FXO and two FXS and just made them completely available over IP to a full Asterisk system on a low power Atom system.

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• VPN trace route

  - by Jake

  I am inside an Active Directory (AD) domain and trying to trace route to another AD domain at a remote site, but supposedly connected by VPN in between. the local domain can be accessed at 192.168.3.x and the remote location 192.168.2.x. When I do a tracert, I am suprised to see that the results did not show the intermediate ISP nodes. If I used the public IP of the remote location, then a normal tracert going through every intermediate node would show. 1 <1 ms <1 ms <1 ms 192.168.3.1 2 1 ms <1 ms <1 ms 192.168.3.254 3 7 ms 7 ms 7 ms 212.31.2xx.xx 4 197 ms 201 ms 196 ms 62.6.1.2xx 5 201 ms 201 ms 210 ms vacc27.norwich.vpn-acc.bt.net [62.6.192.87] 6 209 ms 209 ms 209 ms 81.146.xxx.xx 7 209 ms 209 ms 209 ms COMPANYDOMAIN [192.168.2.6] Can someone explain how does this VPN tunnelling works? Does this mean VPN is technically faster than without?

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• Samsung i780 networking problem

  - by Infinity

  Hello guys! Maybe this is not the right place to ask this, but I give a try for it. Please don't rate it down, just ignore it if you don't like. So I have a Samsung i780 mobile phone and I would like to use the internet through my wireless router. I have connected to it. I got an IP address. My laptop is also connected to the same wireless network and I can ping the mobile phone and I get answer. When I open the internet explorer and enter an address it says that it cannot connect to the internet. I have googled very much, but can't find the problem. What do you think, what is the solution?

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• pfsense CARP - wan failure on firewall

  - by eldblz

  I have recently configured 2 firewall (on 2 DELL PowerEdge R210II with ESXI 5.1) with pfsense. We have several LANs and 2 WANs. Everything is running fine but i have a strange behavior: i can access internet from alla LANs but not from the firewall (itself). For example the firewall cannot retrive package information or if i setup a gatway monitor ip (like google 8.8.8.8 ) this fails. These are the screenshots of firewall configuration: http://imgur.com/a/LNuMz#0 ATM i kept firewall rules to minimum to avoid problem or conflicts. Any ideas how to solve the problem? Thank you in advance.

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• First requests are painfully slow

  - by winSharp93

  I am running Redmine under IIS using Zoo. Installation was done using the Web Platform Installer and the default configuration has not been touched. However, when using the application, the first requests take very long to complete (sometimes more than one minute). During that time, the ruby.exe causes some CPU load (about 15%). According to the log files, it's mainly the views taking that long to render: Started GET "/redmine/login" for IP at 2012-09-04 09:54:08 +0200 Processing by AccountController#login as HTML Rendered account/login.html.erb within layouts/base (42150.5ms) Completed 200 OK in 43508ms (Views: 43008.5ms | ActiveRecord: 0.0ms) Rendered account/login.html.erb within layouts/base (42435.1ms) Completed 200 OK in 44100ms (Views: 43523.3ms | ActiveRecord: 0.0ms) After the initial delay, further request times are totally acceptable. Any ideas on how to speed up the warmup time?

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