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• Changed file and now I cannot access my SSH anymore

  - by Arnold

  I was trying to get my dedicated server to have a couple of VPS's installed using this tutorial: http://linux-vserver.org/Installation_on_CentOS In the process I had to change a file: /etc/ssh/sshd_config The documentation advises to change it into: ListenAddress <host IP address> Guess what? I literally added <host IP address> instead of the dedicated servers IP. I restarted the server and now I'm not able to access my SSH anymore. Can anyone help me to gain access to my SSH again? I'm using CentOS 6.

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• Are You Drowning in E-mail ?

  Learn to Reduce Email Overload By 54% E-mail is Making You Stupid! At least, that';s what a headline in the March edition of Entrepreneur Magazine claims. But that';s not all... a survey from the Radi... [Author: Ted Gulas - Computers and Internet - June 07, 2010]

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• how to pass domain name to backend with pound

  - by FurtiveFelon

  I am using pound as a way to decode SSL for the backend, but the bulk of the work is done on varnish (including virtualhost stuff). As a result, I need pound to just forward all other traffic to varnish verbatim, but it doesn't seem to do that. I am using the default configuration: ListenHTTP Address 1.2.3.4 Port 8080 ## allow PUT and DELETE also (by default only GET, POST and HEAD)?: xHTTP 0 Service BackEnd Address 127.0.0.1 Port 80 End End End So whenever I hit example.com:8080, it will always redirect to the default backend for varnish, which i assume was because the domain (host) header isn't send along. Anyone know what could be wrong? Thanks a lot! Jason

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• Remote location looses connectivity

  - by user24559

  I have a remote location that has constant internet access using DSL. The remote location only has three Linksys cameras that use the internet access with a router. There is no computer on the network. The router is configured to use the DYN.org service to keep the IP address updated if the internet provider assigns a new ip address. The problem I am having is the router after a period of time stops responding to incoming ping requests and the cameras are shown offline. However, if I keep one of the cameras constantly streaming data then the connection to all the cameras works just fine all the time. How can I keep the router from appearing to be sleeping and not responding to incoming requests? The router is the Linksys WRT300N.

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• both IPV4 and IPV6 at the same time over DSL connection?

  - by namiheike

  Let me describe my situation: while I connect computer with the wire, I've got an IPV6 address automatically, there's a "Wired connection" tab in network manager, and I can access an website that support IPV6 (google,facebook,twitter...)with a hosts file, or use the proxy like google.com.sixxs.org But if I want to access the whole internet, I have to create a DSL connection with username and password that ISP gave me. BUT after I change my connection into this DSL connection, I cannot access website over IPV6, even there's the site's ipv6 address in /etc/hosts, then I realize that I lose my IPV6 connection, because the ping6 says connect: Network is unreachable. the problem is, there's no IPV6 tab or options about IPV6 in the configure of DSL connection. It feels like I can only use one connection at the same time, but the DSL doesn't support IPV6 and the wired connection doesn't support IPV4(I mean, there's no way to input the password the ISP gave me) maybe make somebody uncomfortable, but when I work in MS windows, there's no such problem, (maybe just feel like) I can access V4 and V6 at the same time. So how to solve with this? thanks a lot. I'm in 11.10 + gnome3

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• Can't play Steel Storm, Burning Retribution

  - by Goytor

  I've bougth Steel Storm, Burning Retribution in the Software Center, and every time I run it shows the following message: You have reached this menu due to missing or unlocable content/data You may consider adding -base dir /path/to/game to your launch commandline I've gone to main menu in the preferences tab and changed the launcher to no avail. I've tried running it from console, with /opt/steelstorm-episode2/steelstorm, I got: Game is Steel-Storm using base gamedir gamedata Steel-Storm Linux 01:07:07 Jun 11 2011 - release Playing shareware version. Skeletal animation uses SSE code path DPSOFTRAST available (SSE2 instructions detected) Failed to init SDL joystick subsystem: couldn't exec quake.rc couldn't exec default.cfg execing config.cfg couldn't exec autoexec.cfg Client using an automatically assigned port Client opened a socket on address 0.0.0.0:0 Client opened a socket on address [0:0:0:0:0:0:0:0]:0 Linked against SDL version 1.2.12 Using SDL library version 1.2.14 GL_VENDOR: NVIDIA Corporation GL_RENDERER: GeForce 6150SE nForce 430/PCI/SSE2/3DNOW! GL_VERSION: 2.1.2 NVIDIA 270.41.06 vid.support.arb_multisample 1 vid.mode.samples 0 vid.support.gl20shaders 1 Video Mode: fullscreen 640x480x32x0.00hz S_Startup: initializing sound output format: 48000Hz, 16 bit, 2 channels... Wanted audio Specification: Channels : 2 Format : 0x8010 Frequency : 48000 Samples : 2048 Obtained audio specification: Channels : 2 Format : 0x8010 Frequency : 48000 Samples : 1024 Sound format: 48000Hz, 2 channels, 16 bits per sample CDAudio_Init: No CD in player. Can't get initial CD volume CD Audio Initialized If I try -base /opt/steelstorm-episode2/steelstorm says "command not found".

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• Apache reverse proxy, redirect requests based on IP addresses

  - by Mr Aleph

  I have a Linux box with 2 NICs. I installed and configured Apache 2 for reverse proxy. Each NIC has its own IP address and I was wondering if there is any way to redirect the requests via Apache based on the IP address that was used to get to the box. For example: eth0 has IP 100.100.100.100, eth1 has 200.200.200.200 If I browse to http://100.100.100.100/AppName/App I want it to redirect to 1.1.1.1 and if I browse to http://200.200.200.200/AppName/App I want it to go to 2.2.2.2 Right now the configuration for Apache is set as follow ProxyPass /AppName/App http://1.1.1.1/AppName/App ProxyPassReverse /AppName/App http://1.1.1.1/AppName/App So anything going to /AppName/App will be redirected to 1.1.1.1 I was reading something about ProxyHTMLURLMap but I don't know whether this is something that might help. Any idea how to do this? Thanks!

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• How to test DNS glue record?

  - by Sunnz

  Hello I have just set up a DNS server for my domain example.org with 2 name servers ns1.example.org and ns2.example.org. I have attempted to set up a glue record for ns1 and ns2 at my registrar. It seems to work for now when I do a dig example.org but when I do a whois example.org it lists ns1.example.org and ns2.example.org but not their IP address which should be set up as a glue record. So I am wondering how do I check for the existence of a glue record? Do I do it with whois? I have seen .com and .net whois records that have both the domain name as well as the IP address for the name servers, is .org different? What's the proper way to test this? Thanks.

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• How Does a PC Virus Work?

  Surfing the web, using email, and gaming online are things you have probably done at some point. Most do them on a daily basis. Everyone has heard the term "computer virus" but don';t necessarily unde... [Author: Michele Wallace - Computers and Internet - May 21, 2010]

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• Multi Gateway and Backup Routing on a cisco router

  - by user64880

  Hi all, I have a 2611 Cisco Router with only one Fastethernet port Now I have two internet gateways. I want to config my router as when primary routing fails second routing automatically start to route all my packets. When I set 2 IP route command in my router then I check I see it work well but when peer IP on primary routing is down it can not change to second routing until I remove first route command.In the following I write my setting. How can I set it? interface FastEthernet0/0 ip address 81.12.21.100 255.255.255.248 secondary ip address 62.220.97.14 255.255.255.252 ip route 0.0.0.0 0.0.0.0 62.220.97.13 ip route 0.0.0.0 0.0.0.0 81.12.21.97 100 Cheer, Kamal

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• Ubuntu 12.04 Server ping gateway responds with destination host unreachable

  - by blckblttkd

  I consider myself fairly avid with Ubuntu and Linux, but this one has me stumped. I built up a Xen Server using Ubuntu 12.04 as the base operating system. It has multiple domUs running on it. My home network has a statically defined network where I got all the network connectivity going peachy. The server was moved to a permanent home this morning. So, the network configuration on the main system had to change. Again, another static network, but now I can't ping the upstream gateway from the host. As the VMs use this NIC over a bridge, they too are broken. Ping responds with "destination host unreachable." I simplified the networking down to a simple static network as seen below (no bridge or anything) just to get it to work. Here's the contents of my /etc/network/interfaces file: auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 216.7.188.228 gateway 216.7.188.225 netmask 255.255.255.240 broadcast 216.7.188.255 network 216.7.188.0 dns-nameservers 8.8.8.8 8.8.4.4 Here's the contents of route -n 0.0.0.0 216.7.188.225 0.0.0.0 UG 100 0 0 eth0 216.7.188.224 0.0.0.0 255.255.255.240 U 0 0 0 eth0 And the results of pinging the gateway: PING 216.7.188.225 (216.7.188.225) 56(84) bytes of data. From 216.7.188.228 icmp_seq=1 Destination Host Unreachable From 216.7.188.228 icmp_seq=1 Destination Host Unreachable From 216.7.188.228 icmp_seq=1 Destination Host Unreachable Again, this worked in one network flawlessly (obviously with different parameters in the interfaces file). I did try using eth1 (as there are two NICS on the server (in case the MAC address got flipped on bootup). No success there. Yes, the cable is in the right port now :) Any thoughts? I appreciate the help!

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• CNAME to another domain fails on some office networks, why?

  - by crashalpha

  Our domain "aspenfasteners.com" is hosted by Volusion. We have CNAME records "find" and "search" which point to site indexing accounts on www.picosearch.com. These addresses fail on SOME private office networks which have their own DNS. We suspect the problem comes from Volusion's own name servers, n2.volusion.com and n3.volusion.com. Volusion support on problems this technical is non-existant. We have tried an NSLOOKUP on find.aspenfasteners.com with level 2 debugging info, and we got the results below. Is it possible that the local DNS is recursing to Volusion's name servers, and that while Volusion DOES return the canonical name, they do NOT resolve the address? Can anybody with expertise in this sort of stuff PLEASE look at the NSLOOKUP below and tell me if we are right, because Volusion is giving me absolutely NO support on this topic. I need proof of where the problem lies. Thanks VERY much! Carlo find.aspenfasteners.com Server: mtl-srm-dbsv-01.fastenerwholesale.com Address: 192.168.0.44 SendRequest(), len 61 HEADER: opcode = QUERY, id = 8, rcode = NOERROR header flags: query, want recursion questions = 1, answers = 0, authority records = 0, additional = 0 QUESTIONS: find.aspenfasteners.com.fastenerwholesale.com, type = A, class = IN ------------ Got answer (138 bytes): HEADER: opcode = QUERY, id = 8, rcode = NXDOMAIN header flags: response, auth. answer, want recursion, recursion avail. questions = 1, answers = 0, authority records = 1, additional = 0 QUESTIONS: find.aspenfasteners.com.fastenerwholesale.com, type = A, class = IN AUTHORITY RECORDS: -> fastenerwholesale.com type = SOA, class = IN, dlen = 46 ttl = 3600 (1 hour) primary name server = mtl-srm-dbsv-01.fastenerwholesale.com responsible mail addr = admin.fastenerwholesale.com serial = 10219 refresh = 900 (15 mins) retry = 600 (10 mins) expire = 86400 (1 day) default TTL = 3600 (1 hour) ------------ SendRequest(), len 41 HEADER: opcode = QUERY, id = 9, rcode = NOERROR header flags: query, want recursion questions = 1, answers = 0, authority records = 0, additional = 0 QUESTIONS: find.aspenfasteners.com, type = A, class = IN ------------ Got answer (141 bytes): HEADER: opcode = QUERY, id = 9, rcode = NXDOMAIN header flags: response, auth. answer questions = 1, answers = 1, authority records = 1, additional = 1 QUESTIONS: find.aspenfasteners.com, type = A, class = IN ANSWERS: -> find.aspenfasteners.com type = CNAME, class = IN, dlen = 17 canonical name = www.picosearch.com ttl = 3600 (1 hour) AUTHORITY RECORDS: -> com type = SOA, class = IN, dlen = 43 ttl = 900 (15 mins) primary name server = ns3.volusion.com responsible mail addr = admin.volusion.com serial = 1 refresh = 900 (15 mins) retry = 600 (10 mins) expire = 86400 (1 day) default TTL = 3600 (1 hour) ADDITIONAL RECORDS: -> ns3.volusion.com type = A, class = IN, dlen = 4 internet address = 65.61.137.154 ttl = 900 (15 mins) * mtl-srm-dbsv-01.fastenerwholesale.com can't find find.aspenfasteners.com: Non-existent domain

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• Configuring Linux Network

  - by Reiler

  Hi I'm working on some software, that runs on a Centos 5.xx installation. I'ts not allowed for our customers to log in to Linux, everything is done from Windows applications, developed by us. So we have build a frontend for the user to configure network setup: Static/DHCP, ip-address, gateway, DNS, Hostname. Right now I let the user enter the information in the Windows app, and then write it on the Linux server like this: Write to /etc/resolv.conf: Nameserver Write to /etc/sysconfig/network: Gateway and Hostname Write to /etc/sysconfig/network-scripts/ifcfg-eth0: Ipaddress, Netmask, Bootproto(DHCP or Static) I also (after some time) found out that I was unable to send mail, unless I wrote in /etc/hosts: 127.0.0.1 Hostname All this seems to work, but is there a better/easier way to do this? Also, I read the network configuration nearly the same way, but if I use DHCP, I miss som information, for instance the Ip-address. I know that I can get some information from the commandline (ifconfig), but I dont get for instance Hostname, Gateway and DNS. Is there a commandline tool that will display this?

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• DHCP for Multiple Subnets

  - by TheD

  So this is the current setup - essentially I would like to get my DHCP server, serving DHCP requests for two seperate subnets. Netgear DG834G acting as a modem connected to a Sonicwall Pro 2040. X0 - LAN - 192.168.1.0/24 X1 - WAN - <WAN-IP> X2 - WLAN - 192.168.10.0/24 At the moment, I have a 2008R2 server with DHCP installed, with an IP address on the 192.168.1.0/24 range handling DHCP fine for this subnet. The Sonicwall is configured correctly - anything connected to the WLAN has Full Allow to anything in the LAN, and vice versa but it will not lease an IP from my Server. I've also added another IP address to the server, so the physical NIC now has two IP's: 192.168.1.2 and 192.168.10.2 with a DHCP scope configured for each. Still no luck! Any ideas? Thanks!

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• lots of dns requests from China, should I worry?

  - by nn4l

  I have turned on dns query logs, and when running "tail -f /var/log/syslog" I see that I get hundreds of identical requests from a single ip address: Apr 7 12:36:13 server17 named[26294]: client 121.12.173.191#10856: query: mydomain.de IN ANY + Apr 7 12:36:13 server17 named[26294]: client 121.12.173.191#44334: query: mydomain.de IN ANY + Apr 7 12:36:13 server17 named[26294]: client 121.12.173.191#15268: query: mydomain.de IN ANY + Apr 7 12:36:13 server17 named[26294]: client 121.12.173.191#59597: query: mydomain.de IN ANY + The frequency is about 5 - 10 requests per second, going on for about a minute. After that the same effect repeats from a different IP address. I have now logged about 10000 requests from about 25 ip addresses within just a couple of hours, all of them come from China according to "whois [ipaddr]". What is going on here? Is my name server under attack? Can I do something about this?

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• openvpn and virtualbox

  - by hyperboreean

  Hi guys, I have a linux machine on which I occasionally run Windows XP in Virtual Box. All runs wonderful, except for the openvpn in XP, which can't connect to the vpn server running on a remote machine. The vpn client works from linux ... as far as I read until now it seems to be a problem of port forwarding ... I keep getting this error: TCP/UDP: Incoming packet rejected from 10.0.2.2:1194, expected peer address: (allow this incoming source address/port by removing --remote or adding --float) , but have no idea how to fix it.

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• Accomplishment Viewer not displaying Ask Ubuntu badges

  - by Frantumn

  I've downloaded the new Ubuntu Accomplishment viewer. I've read and seen pictures of the program combining with AU badges. However, mine doesn't show anything other than the initial Trophies. I've set up my identity with my launcpad email, and I've gone to File/Check Accomplishments and it still doesn't show any of the AU items. Is there something extra I have to do to get this program to work with AU?

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• need help upgrading small business wifi network

  - by Henry Jackson

  Our small business currently has 3 wireless access points around the building, each with their own SSID. Security is done with WEP (ick) and MAC address filtering (double ick). We are trying to reconfigure the setup, with these goals: wifi roaming between the access points user-based authentication that isn't as annoying as MAC address filtering. 1) The entire building is hardwired with ethernet, so I assume it should be easy to set up the routers to act as one big network, but I can't figure out how. Can someone point me in the right direction? The routers are consumer-grade linksys routers, is it possible to do this without getting new hardware? 2) For security, we will probably upgrade to WPA2, and I'm thinking of using the Enterprise version so that users can log in with a username, instead of having a single key (so if an employee leaves or something, their access can be removed). We have several on-site Windows servers, can one of them be set up as a RADIUS server, or is that best left to a dedicated machine (again, using existing hardware is good).

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• foobar.com working, but www.foobar.com not working?

  - by dpmattingly

  I am setting up a web site for a client. She is using GoDaddy for domain registration, and a hosting company I have never used before. After setting up the nameservers on GoDaddy's side, the address foobar.com (for example) is correctly directing to the new site. However, the address www.foobar.com is redirecting to a 404 page on the hosting company's side. I've been dealing with customer service on the hosting side, and they have told me various things including wait for DNS propagation (which has obviously happened since the 404 page is on their side), and to make sure that the nameservers on GoDaddy's side were entered in lower case instead of upper case (which I know doesn't matter since nameservers are case insensitive). I think I'm getting the runaround from the hosting company, but the client had signed up with them before I came to the project, so if possible I'd like to resolve this issue with them before we start treating it as a loss. Does anybody know what could cause foobar.com to resolve correctly but www.foobar.com to not resolve? How would I best be able to suggest a fix to this through the technical support channels of a hosting company?

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• Possible to get OpenDNS to dereference Host on VPN?

  - by Scott P

  I recently changed ISPs for my home internet. I am now having some trouble getting back into the corporate network from home over the VPN. I have figured out the OpenDNS is resolving the Hosts on the VPN incorrectly when I am using TCP/IP. When I browse to one of the hosts on corporate network, i.e. \host1, from the file manager this succeeds. However, when I ping the host, i.e. ping host1, the IP address is resolving to the OpenDNS name server instead of the actual Host IP address. Does anyone know how to make this work? On a hunch, I turned off type correction. But, this did not help.

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• need help upgrading small business wifi network

  - by Henry Jackson

  Our small business currently has 3 wireless access points around the building, each with their own SSID. Security is done with WEP (ick) and MAC address filtering (double ick). We are trying to reconfigure the setup, with these goals: wifi roaming between the access points user-based authentication that isn't as annoying as MAC address filtering. 1) The entire building is hardwired with ethernet, so I assume it should be easy to set up the routers to act as one big network, but I can't figure out how. Can someone point me in the right direction? The routers are consumer-grade linksys routers, is it possible to do this without getting new hardware? 2) For security, we will probably upgrade to WPA2, and I'm thinking of using the Enterprise version so that users can log in with a username, instead of having a single key (so if an employee leaves or something, their access can be removed). We have several on-site Windows servers, can one of them be set up as a RADIUS server, or is that best left to a dedicated machine (again, using existing hardware is good).

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• need help upgrading small business wifi network

  - by Henry Jackson

  Our small business currently has 3 wireless access points around the building, each with their own SSID. Security is done with WEP (ick) and MAC address filtering (double ick). We are trying to reconfigure the setup, with these goals: wifi roaming between the access points user-based authentication that isn't as annoying as MAC address filtering. 1) The entire building is hardwired with ethernet, so I assume it should be easy to set up the routers to act as one big network, but I can't figure out how. Can someone point me in the right direction? The routers are consumer-grade linksys routers, is it possible to do this without getting new hardware? 2) For security, we will probably upgrade to WPA2, and I'm thinking of using the Enterprise version so that users can log in with a username, instead of having a single key (so if an employee leaves or something, their access can be removed). We have several on-site Windows servers, can one of them be set up as a RADIUS server, or is that best left to a dedicated machine (again, using existing hardware is good).

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• One site being on a subdirectory of another. Does google count this against you?

  - by Mick

  I have created two similar websites (relating to monetary systems). So far, one appears to be loved by Google and the other hated. I'm struggling to work out why. This is a mystery to me because both sites were created by me with the same design philosophy, both in pure html. Both are packed to the rafters with references to, and information about, their respective subjects. One issue I'm worried may be the cause is to do with the location of the sites. I got a web hosting package from hostmonster.com for the successful one, but less liked one is just an "add-on" which sits on a subdirectory of the successful one. I wonder if Google somehow detects this and treats it as a less significant website? EDIT: Just to clarify, even though one site is an add-on that sits on a subdirectory of the other, the URL is arranged to look like it is a root. I.e. the unpopular site can be accessed directly with a simple www.myunpopularsite.com name, without specifying any subdirectory. EDIT: Just in case its important... say the popular site is called pop.com and the unpopular one unpop.com. In the webspace I've purchased, there is a directory called public_html. This is where I put the index.htm and all the other files of my popular site. When I purchased the add-on unpop.com. I made a subdirectory of public_html called unpop. It is within this "public_html\unpop\" that I place the index.htm and all the other files of my unpopular site. Typing www.unpop.com into the address bar of a browser links directly to the contents of "public_html\unpop\" and the user is not aware that this site is sitting on a subdirectory of another site. BUT if you type "www.pop.com/unpop" into the address bar of a browser you DO see the unpopular site.

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• Upcoming PTS Exadata Technical Workshops - July 26-27, 2012 -Madrid, Spain

  - by Javier Puerta

  The popular Exadata Technical Workshops delivered by PTS (Platform Technology Services) for partners architects and technical staff  are scheduled for the following locations and dates: (agenda details and registration by clicking the link) July 26-27, 2012: Madrid, Spain Register now at the link below: Oracle Database Machine and Exadata v2 Workshop July 26-27, 2012: Oracle Madrid, Spain Register Here! Questions? For registration questions please send an email to [email protected] Platform Technologies Enablement Services

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• Is it possible to change an "Unidentified Network" into a "Home" or "Work" network on Windows 7

  - by Rhys

  I have a problem with Windows 7 RC (7100). I frequently use a crossover network cable on WinXP with static IP addresses to connect to various industrial devices (e.g. robots, pumps, valves or even other Windows PCs) that have Ethernet network ports. When I do this on Windows 7, the network connection is classed as an "Unidentified Network" in Networks and Sharing Center and the public firewall profile is enforced by Windows. I do not want to change the public profile and would prefer to use the Home or Work profile instead. For other networks like Home and Work I'm able to click on them and change the classification. This is not available for unidentified networks. My questions are these:- Is there a way to manual override the "Unidentified Network" classification? What tests are performed on the network that fail, therefore classifying it as an "Unidentified Network" By googling (hitting mainly vista issues) it seems that you need to ensure that the default gateway is not 0.0.0.0. I've done this. I've also tried to remove IPv6 but this does not seem possible on Windows 7. UPDATE For those still having problems here is the answer to my issue and the possible reasons why:- Win7 keeps a list of the networks you visit by (I am assuming, but don’t know for sure) the MACID of the device pointed to by the Default Gateway. The default gateway is usually the constant device in a network (i.e. the NAT or router) so can be used to uniquely identify one network from another. The default gateway in the IPv4 properties panel must therefore point to an actual endpoint so windows can then keep track of it. If there is a device at the end of the Default Gateway windows will identify it and track it remembering its settings. The ways you can therefore fool Win7 is to either point the default gateway to your own IP address, or the IP address of the target device you’re communicating with. This will have the side effect of expecting that target device to start routing packets for IP destinations that are outside your subnet. So some applications on Win7 will try to communicate with the internet, these will be passed on to the default gateway (either back you the same IP address or a target device that is not a router) and thus will eventually timeout because neither can route packets. Which you can usually live with. This gets slightly complicated when you mix a this type of connection with a real connection to the internet via WIFI. The wired network card usually has priority when routing because of the “interface metric” so some applications might not connect correctly.

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