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• Cisco VPN Connection - No internet no nothing

  - by Kevin

  Hi all, Sorry if this has been posted, I tried searching but I am not exactly sure what I am looking for, I am a developer not a networking guy. We have a client whom we need to use Cisco VPN client to connect to their servers. I have installed the software, dropped in the provided .pcf file, and I can connect. However, when I do, I lose all local and internet capabilities, no hosts resolve, and I still can't connect to their internal FTP and development sites. This leads me to believe either a setting is wrong in my Cisco software, and/or their network is not correctly configured. Does anyone know anything about Cisco VPN'ing that can give me a hand? My colleague seems to indicate that they need to enable split tunneling on their end (or a similar setting).

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• Double default gateway ubuntu server

  - by Elena

  Hi, I've just installed an Ubuntu server 9.10 on an EEEBox. This is my /etc/network/interfaces # The loopback network interface auto lo iface lo inet loopback auto wlan0 iface wlan0 inet static address 192.168.48.16 netmask 255.255.248.0 wireless-essid mynet auto eth0 iface eth0 inet static address xx.xx.xx.xx netmask 255.255.255.224 gateway xx.xx.yy.yy When I restart /etc/init.d/networking, I can access the eth0 ip address from the internet and I can ping the machines in my wifi network mynet. Everything works fine and I have one default gateway. But after some time if I check again the route I just find two default gateways: one is correct and is the previous one, but the other is the one of the wifi network. I have a quite low signal of mynet where my server is and sometimes the wifi just disconnect and then reconnect again. Then I think that this can be a problem and the dhcp of the wifi net, when reconnecting it also add a default gateway. Any idea on how to resolve this issue?

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• Unidentified Connection in Compaq CQ61Windows7 OS on DSL cable network connection

  - by Mohammed Thouseef

  I have Dell studio with shared DSL internet connection my router is "NETGEAR DG834" & Network connection discription is "Broadcom netlink tm gigabit ethernet" this connection is working fine with dell laptop with Vista homepremium OS. My Question is? If i connect HPcompaq presario CQ61 in this connection it will automatically select Public network and display unidentified connection i tried several times but not suceeded its OS is Win7 home premium. but wireless networking is working fine only this problem is faceing with DSL cable connection when i diagnos the connection an error will generate "Local Area Connection does not have a valid IP configuration" in LAN Connection status window i noticed IPV4 & IPV6 Connectivity is showing "No Network Access" please can you clarify whats the problem.

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• Troubleshooting Amazon EC2 reboot

  - by tgm

  We've had a server (CentOS) running in EC2 for a few months. It had been going pretty smoothly until today when we got an alarm that the server was unavailable (HTTP service couldn't be reached). So I tried SSHing into the box but that timed out as well. I logged into the EC2 console and it said the instance was running and there wasn't anything in the system log. One odd thing I noticed is that even though we have an Elastic IP attached to it (which shows in the Elastic IP management area), the instance detail is not showing that there is an EIP associated with the instance. I looked through the message log and the last thing I see around the time we got our alert was the dhclient renewed the lease. I'm guessing there may have been some sort of issue with the networking. How might I check if that was the problem, or if there were any other issues that may have caused our instance to stop responding?

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• Good book for a software developer doing part-time (Linux) system administration work

  - by Tony Meyer

  In many smaller organisations, developers often end up doing some system administration work (for obvious reasons). A lot of the time, they have great developer skills, but few system administration skills (perhaps all self-taught), and so have to learn as they go, which is fairly inefficient. Are there canonical (or simply great) books that would help in this situation? More advanced than just using a shell (presumably a developer can do that), but not aimed at someone that hopes to spend many years doing this work. Ideally, something fairly generic (although specific to a distribution would be OK), covering databases, networking, general maintenance, etc, not just one specific task. For the most part, I'm interested in shell-based work (i.e. no GUI installed), although if there's something outstanding I'm missing, please point it out. (As an analogy, replace "system administration" with C, and I'd want K&R, with C++ and I'd want Meyers' "Effective C++").

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• User Profile cannot be loaded - Windows 7

  - by Ryan

  After uninstalling an HP Vector Mouse driver, then rebooting, when Windows tries to auto log me in, i get an error message saying tyhe following: The User Profile Service failed the Login. User Profile cannot be loaded. Due to the fact that it is the only account on this PC, I cannot even go into another account. I rebooted the machine several times, before going into Safe Mode with Networking. For some reason, I cannot create a new account whilst in safe mode (I think it is to do with UAC, nothing with UAC is clickable). Thus, I am stuck. I cannot get into my account, nor can I create a new one to copy files over to. Any ideas? Thanks in advance! Ryan EDIT: System Restore was, for some reason turned off. Thus, I cannot restore to a working point.

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• How do I install a CentOS 5.5 in Xenserver?

  - by deweller

  When I try to install CentOS 5.5 in a new VM, I get an error that the installer is unable to retrieve stage2.img. I have verified the URL and I am able to download this file from a web browser. I suspect it is a networking/routing issue, but I can't figure out what is wrong. This is a new install of XenServer 5.6 on a new server. This server is remote, so I don't have physical access to the box - only ssh access. Can anyone give me some tips on what might be wrong here? Do I need to do something special to get a net install to work? For what its worth, I see the same error trying to install Debian Woody using a similar process. Thanks.

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• How do I turn a router into a wireless bridge

  - by Rob Cowell

  I'm trying to get my HD satellite receiver connected to the internet - it has an Ethernet port on the back but my networking equipment is all upstairs. I had the idea of connecting a spare wireless router to the box with an ethernet cable and getting that wireless router to talk to my "main" wireless router (the one with the ADSL connection) to supply internet access. I believe this entails getting the router to work as a "wireless bridge", but I don't know how to do this. Currently, the ADSL line is hooked up to a NETGEAR DG834G. The other two "spare" wireless routers I have to act as the bridge are :- Huawei HG520b Netgear DGN2000 BT Homehub I'd prefer not to change the "main" router (cos I'm used to its web admin UI) - does anyone know a way I can achieve the connectivity I require with the equipment I have?

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• How do I turn a router into a wireless bridge

  - by Rob Cowell

  I'm trying to get my HD satellite receiver connected to the internet - it has an Ethernet port on the back but my networking equipment is all upstairs. I had the idea of connecting a spare wireless router to the box with an ethernet cable and getting that wireless router to talk to my "main" wireless router (the one with the ADSL connection) to supply internet access. I believe this entails getting the router to work as a "wireless bridge", but I don't know how to do this. Currently, the ADSL line is hooked up to a NETGEAR DG834G. The other two "spare" wireless routers I have to act as the bridge are :- Huawei HG520b Netgear DGN2000 BT Homehub I'd prefer not to change the "main" router (cos I'm used to its web admin UI) - does anyone know a way I can achieve the connectivity I require with the equipment I have?

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• Unable to access local network when Cisco VPN client is connected

  - by bryanroth

  I'm a developer and don't have much networking expertise, so bear with me. I'm using the Cisco VPN Client 5.0.02.0090 to connect to my work's VPN that way I can RDP into my work computer. Once connected, I can't ping anything on the local network once connected to the VPN thus I am unable to access my work's network. This used to work about two weeks ago but abruptly stopped working today. However, I have the Cisco VPN Client installed on my laptop and I am able to ping and RDP into my work computer from there. Both my desktop and laptop computers are connected to the same router at home. I have tried the following so far: Rebooted my computer Reinstalled VPN client Updated NIC drivers Disabled firewall Opened up ports 500, 4500, and 10000 Any help would be much appreciated. Thanks!

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• Restrict IPMI access on Dell BMC and iDRAC to an allowed IP range

  - by edgester

  I'm trying to secure the iDRAC's and BMC's on some of my Dell servers (R210, R410, R510). I want to restrict access to IPMI commands to only a few IP addresses. I've successfully restricted access to the iDrac using the instructions from http://support.dell.com/support/edocs/software/smdrac3/idrac/idrac10mono/en/ug/html/racugc2d.htm#wp1181529 , but the IP restrictions do not affect IPMI. A separate management network is not practical at this time because of lack or ports and some Dell BMC's don't offer a separate port. I'm told by my networking group that our switches don't support trunking, so using the vlan tagging is not an option either. Is there a way restrict the IPMI access to a list of allowed addresses? FYI, for various reasons, I have a mix of Dell servers with BMC's, iDrac Express and iDrac enterprise management features.

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• Using watch to run a shell script - but the script goes defunct

  - by PHP-Steven

  So I want to keep an eye on my network connectivity so I can make a report for my ISP. (seems like the modem goes out for about 30-60 seconds about once a day) So I copied this handy little script http://www.cyberciti.biz/tips/simple-linux-and-unix-system-monitoring-with-ping-command-and-scripts.html And an running it with watch -n 15 ./ping-test.sh I have been testing it by pulling the plug on my modem. The first time watch runs the script after the network goes out it runs fine (sends some email) and then goes defunct. Once networking is restored the script "finishes" and then watch runs it again. So I'm getting mail for when the network goes down, but not how long it was down for. If I run the script straight from the command line it runs (emails) and then exits. Any ideas why? How can I get the script to keep running once the network is down?

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• Double default gateway ubuntu server

  - by Elena

  I've just installed an Ubuntu server 9.10 on an EEEBox. This is my /etc/network/interfaces # The loopback network interface auto lo iface lo inet loopback auto wlan0 iface wlan0 inet static address 192.168.48.16 netmask 255.255.248.0 wireless-essid mynet auto eth0 iface eth0 inet static address xx.xx.xx.xx netmask 255.255.255.224 gateway xx.xx.yy.yy When I restart /etc/init.d/networking, I can access the eth0 ip address from the internet and I can ping the machines in my wifi network mynet. Everything works fine and I have one default gateway. But after some time if I check again the route I just find two default gateways: one is correct and is the previous one, but the other is the one of the wifi network. I have a quite low signal of mynet where my server is and sometimes the wifi just disconnect and then reconnect again. Then I think that this can be a problem and the dhcp of the wifi net, when reconnecting it also add a default gateway. Any idea on how to resolve this issue?

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• How to create Isolated test environment

  - by Safin09

  Hi All, I am very new to the VMware world. We have VMWare vCenter 4 in the production environment but we have created multiple VLAN through Cisco Switch. I want know, how I can create an isolated test environment for software testing purpose only, so anything will happen in that test vLan will not make trouble in the production environment. "Host-only networking" is the solution or there is a better way to achieve this result? My requirements A. Hosts should be able to access Internet and a Network Share drive but not Production network B. Hosts should connect each other inside the Virtual LAN C. I should be able to take automatic or periodic backup or snapshoot and deploy snapshot when necessary. Whatever your answer is, please give me steps, how to do, if possible. If I need to purchase anything, I am ready to do but I don't want to spend big money. Many thanks in advance.

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• Is it possible to rate-limit an scp/sftp/rsync/etc transfer from the command-line? ie, manual QoS on

  - by warren

  Specifically, I am looking to rate-limit an scp or sftp session (or other arbitrary network call) in the call itself. For example, let's say I want to copy 100MB to one server, and 1GB to another. I'd like to be able to run both of these at the same time, but maintain a QoS for "normal" computer usage - somewhat similar to how you can rate-limit bittorrent. Is there a way to do this without touching the networking hardware? I'm envisioning something akin to: magic-qos-tool 'scp file user@host:/path/to/file' Or.. scp -rate 40kbps file user@host:/path/to/file

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• windows is unresponsive but works well in safe mode

  - by kacalapy

  I was installing a few utility apps and things when my laptop running windows 7 stopped responding. I tried to reboot and still very unresponsive... the mouse moves but i am unable to click on icons or open the start menu. eventually things catch up after over a minute. when i start in safe mode with networking support i am able to operate the laptop at lightening speed and web browsing is a dream. I ran msconfig and shut off all non windows services and still get the same thing. after no results i then got and ran spybot, malwarebytes, and other such tools but got no results. they all show nothing wrong. now what?

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• win xp client, win 7 host, only xp drivers

  - by brett

  I have a win 7 64 bit box which has xp on it in a vmware module and also the win7 version. I can use my old usb wifi card under virtual xp as i have the wifi drivers, but apparently the manufacturing company never made any further drivers, nor did it release the source code. Is it possible to get networking between the client and the host, so that my host can browse etc? I thought the microsoft loopback adapter might be the answer but ever example i can find of it's use describes a setup where the host is connected fine and needs to route data to the client as well.

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• IP tables gateway

  - by WojonsTech

  I am trying to make an iptables gateway. I ordered 3 dedicated server from my hosting company all with dual nics. One server has been given all the ip addresses and is connected directly to the internet and has its other nic connected to a switch where the other servers are all connected also. I want to setup iptables so for example the ip address 50.0.2.4 comes into my gateway server it fowards all the traffic to a private ip address using the second nic. This way the second nic can do what ever it needs and can respond back also. I also want it setup that if any of the other servers needs to download anything over the inernet it is able to do so and by using the same ip address that is used for its incomming traffic. Lastly I would like to be able to setup dns and other needed networking stuff that i maybe not thinking about.

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• Use a MOO/MUD/MUSH for project collaboration?

  - by Clinton Blackmore

  Jeff Atwood recently posted about working with a team of programmers remotely. He spoke of pros and cons and of communicating with the team. One of the comments to his article says: Jeff, have you ever considered running a MOO for this? you can have any features you want to add to a MOO- mailing lists, tasks, and so on. All it takes is a moo server and learning moocode. Leetdoodsnonexistentramblings.blogspot.com on May 9, 2010 2:52 PM It is not clear to me how to contact the commenter (short of signing up for a social networking service I've never heard of), so I thought I'd ask here -- does anyone know what useful things you could do with a MOO (or MUD or MUSH) to promote collaboration on a team?

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• Cannot ping my domain-joined server - Can only ping domain controller - host unreachable

  - by Vazgen

  I have a HyperV Server hosting a Domain Controller VM (192.168.1.50) and another VM (192.168.1.51) joined to this domain. I have: domain controller as DNS server forward lookup zone for the domain with host record for 192.168.1.50 and 192.168.1.51 Windows client has primary DNS server set to 192.168.1.50 and secondary to my ISP I can ping 192.168.1.50 (domain controller) successfully but cannot ping 192.168.1.51 (domain-joined VM) When pinging from Windows client: ping 192.168.1.51 Reply from 192.168.1.129 : Destination host unreachable When pinging from Domain Controller: ping 192.168.1.51 Reply from 192.168.1.50 : Destination host unreachable I have 2 virtual network adapters one PRIVATE for intranet (set to static IP 192.168.1.51) and one PUBLIC for internet with a dynamic IP. I noticed the the PUBLIC one inherited the "mydomain.com" domain subtitle after joining the domain... I don't know what this meant but it seemed more intuitive to me to switch THIS ONE to have the static IP. After I configured that I still could not ping but now I get: ping 192.168.1.51 Request timed out What seems to be the issue, I'm relatively new to networking.

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• Using Zebra LP 2844-Z over the network

  - by Jason Kealey

  Hello, I am looking for a network-based label printer. I am looking at this Zebra LP-2844-Z printer. Unfortunately, it does not come with a network interface like the lower-end LP 2824 Plus. The ZebraNet 10/100 Print Server is both expensive for what it does (~$600) and only seems to support wireless networking, not wired. I prefer wired for reliability. Questions: Can I use a cheaper off-the-shelf print server to turn the LP-2844Z to a network printer. Would I get any trouble communicating with the printer via its own programming language or via OPOS? (instead of the Windows driver) Are cheaper print servers reliable? Would I be better to get another printer model that has it built in directly to avoid having issues due to the print server? What other printer would you recommend?

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• Terribly slow Apache2 on VM Virtualbox

  - by cadavre

  I just launched VM Virtualbox with guest Ubuntu Server on host Windows 8. Both 64bit. Everything works perfectly fine. Maybe it's because I'm not using any X... Htop shows ~25% of memory usage, everything is fine, but not Apache2. Normally it's fine, but when I send request from my browser on host (networking mode set to Bridge mode), Apache2 is turning into 1-minute-long loading process with 100% CPU time. Any ideas how to debug it? Any ideas about solving this throat problem?

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• workstation 7 and host-only no connectivity

  - by Steff

  hello, I have a WinXP 32 host (IBM T400) with VWware workstation 7 (7.0.1 build-227600) and some guest OS (Win xp, NT, etc.) I can ping from the host to guest OS and vice versa, but... every other "protocols" do not work at all. No http from host to guest, no CIFS, nothing, nothing, nothing. Windows firewall is turned off, TCP/IP filer is turned off. i re-installed VMware workstation, then the networking started working again, but, after some reboots... it stopped again. Connectivity among guest OS... it works FINE. Can not understand... problems exist just between host and guest. Host-only or NAT... it is the same. Any suggestion?

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• workstation 7 and host-only no connectivity

  - by Steff

  hello, I have a WinXP 32 host (IBM T400) with VWware workstation 7 (7.0.1 build-227600) and some guest OS (Win xp, NT, etc.) I can ping from the host to guest OS and vice versa, but... every other "protocols" do not work at all. No http from host to guest, no CIFS, nothing, nothing, nothing. Windows firewall is turned off, TCP/IP filer is turned off. i re-installed VMware workstation, then the networking started working again, but, after some reboots... it stopped again. Connectivity among guest OS... it works FINE. Can not understand... problems exist just between host and guest. Host-only or NAT... it is the same. Any suggestion?

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• Event Viewer shows service name as a truncated 8 character name

  - by Retrocoder

  I have written a service which logs to the Windows Event Log when it has any problems. This works fine and the service name is shown correctly in the Source column of the Event Viewer. The problem I am seeing is when my service hits some major problems like the networking layer has died etc. When this happens the event log shows errors about my service but the service name is shown as a truncated 8 character name. This name looks to be that of the executable and not the service name. Is this normal behaviour for a truncated name to be show ?

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