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• How can I connect to some old Sun servers?

  - by hellsgate

  We have some old Sun servers (V125, V210, V240, T2000 amongst others) sitting unused and I've been asked to find out if there is anything useful on them before they get wiped and disposed of. However, I've been unable to connect to any of the servers. I tried connecting the servers to a router using the Net Management, Serial Management and standard Ethernet ports. When doing this, I ran 'nmap -sP' from my Linux desktop before and after connecting a server so I could compare the two outputs and hopefully work out what IP address had been assigned to the server, but it didn't appear to have received one. Unfortunately only one of the servers has a VGA output. I was able to access this machine as we still have the login details stored in KeePass, but I've no idea at the moment on how I should go about connecting to any of the others. Any suggestions?

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• Automatically reboot Windows8 if no internet activity

  - by GrapeCamel

  I have a media server located in a very inconvenient part of my house. Occasionally I will have to reset my router or it will reset itself. The issue is the PC loses connectivity for some reason, and I am forced to walk outside, around the house, into the basement, over a bunch of toys and weights and boxes, to push a button to reboot it. I would love to have it check itself every 5-10 minutes and auto reboot if it is unable to ping a given address/IP. Any ideas how to accomplish this?

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• xl create doesn't bring up console

  - by ineff

  I've tryed to run VM in Xen 4.2 using xl command (for what I get this should be standard toolstack, while xm is deprecated). In this case I've the following configuration file kernel = '/media/home_separata/domU_kernel/boot/vmlinuz-linux' ramdisk = '/media/home_separata/domU_kernel/boot/initramfs-linux.img' name = "domU_Arch_linux" memory = "512" root = '/dev/xvda1 ro' disk = ['file:/media/home_separata/domU_kernel/arch_linux_kernel.img,xvda1,w'] vif = ['mac=aa:::10:11:f1,ip=192.168.0.2,bridge=xenbr0'] when I try to start the virtual machine with xl create it seems it works (it also bring up the vif interfaces) but if I try to connect via xl console it gives an error: xenconsole: Could not read tty from store: No such file or directory the fun fact is that the I've the problem inverse using xend/xm (in that case xend doesn't bring up vif interfaces but activate console). Does anyone have any suggestion?

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• WinXP workgroup, 3 routers 3 computers

  - by Silvera

  I have 3 computers with WinXP x86, and 3 Cisco 1800 series routers. I'm trying to create a workgroup so that the 3 computers can share files with eachother. They can ping eachother (without any internet connection), and the routers setup is correctly configured (with interfaces, ip adresses, and ports). But none of the computers can see eachother, even though they are on the same network. My first question would be - can it be done the way it is currently configured - and, if yes, how, or can anyone point me in the right direction?

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• nginx errors: upstream timed out (110: Connection timed out)

  - by Sparsh Gupta

  Hi, I have a nginx server with 5 backend servers. We serve around 400-500 requests/second. I have started getting a large number of Upstream Timed out errors (110: Connection timed out) Error string in error.log looks like 2011/01/10 21:59:46 [error] 1153#0: *1699246778 upstream timed out (110: Connection timed out) while reading response header from upstream, client: {IP}, server: {domain}, request: "GET {URL} HTTP/1.1", upstream: "http://{backend_server}:80/{url}", host: "{domain}", referrer: "{referrer}" Any suggestions how to debug such errors. I am unable to find a munin plugin to keep a check on number of upstream errors. Sometime the number of errors per day is way too high and somedays its a more decent 3 digit number. A munin graph would probably help us finding out any pattern or correlation with anything else How can we make the number of such error as ZERO

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• How do networking ports work? Can I configure the ports that client and server use?

  - by joedotnot

  Let's say i have a "server" program listening on address 1.2.3.4:69 (i.e. remote port 69) When i connect from a "client" program to it, typically i would specify the IP address + port of the target or server system; But what port would the client be using ? And how does the server know which port to connect back to the client on? I understand this question is very general, but just wanting to get a general feel for how things work. Then extending this to a specific protocol, say FTP (typical port 21), can I change it such that the server uses port 69, but the client uses port 100? And similarly, for Remote Desktop in WinXP (typical port 3389), i know how to change the server port to be something other than 3389, but how does one change what port the client uses (if at all possible)?

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• spam email forwarding by server

  - by kikio

  Let's start with this scenario: We have a mailbox (i.e. in yahoo), every message is sent by this account, marked as spam by Gmail spam filter. (because the address or sender IP is blacklisted, not because of content) There is a server which is able to forward incoming messages to another address (email forwarding), for example, to a Gmail mailbox. And it is not blacklisted. The question is: If we send a message, through the dirty mailbox to the server, and server forward it to a Gmail mailbox, will it marked as spam by spam filters?

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• Why are some web clients requesting a page named "cache"?

  - by Toto

  We see errors like this in the apache error log: [Thu May 17 14:32:35 2012] [error] [client 192.168.1.1] File does not exist: /home/www-data/mywebsite.com/r/cache, referer: http://www.mywebsite.com/r/1010 It is strange because: There is no reference in the code/url about a folder/file "cache". The folder/file "cache" does not exist The client is randomly trying to access a "cache" folder everywhere on the website. It is always trying to access the folder/file "cache" following this pattern: Pattern: /level1/.../levelwhatever/filename (referer) /level1/.../levelwhatever/cache We run a LAMP (Debian stable: PHP 5.3.3-7+squeeze9. We also use APC 3.1.3p1). We use Google Analytics and AdSense. We do not know how to reproduce the problem. Note: I replaced the user's IP in the code for privacy.

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• controlling the bandwidth using tc

  - by Supratik

  Hi I have two NIC etho is connected to the internet and eth1 is connected to the LAN. I want to restrict the download limit using iptables and linux tc. So I wrote a test script to verify if it is working. My iptables configuration is as below. iptables -t mangle -N INBOUND iptables -t mangle -I PREROUTING -i eth0 -j INBOUND iptables -t mangle -A INBOUND -j MARK --set-mark 60 My ingress configuration is as below. tc qdisc add dev eth0 handle 1: ingress tc filter add dev eth0 parent 1: protocol ip prio 1 handle 60 fw police rate 100kbit burst 20kbit drop flowid :1 Can you please tell me what I am missing here ?

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• Hosts file in Apache keep changing for OS Linux Redhat [on hold]

  - by jack f

  I have installed Apache server. Two clients ex client_1 and client_2. The operation that we are performing on client_1 reflecting to client_2. We have etc/hosts file in our software install location which is keep on changing for client_2 with client_1 IP address. If I correct the entries in hosts file to client_2 also in the next few minuets it is changing automatically to the client_1(if we start the client_1 service). Please explain the use of hosts file and where and when it will change by Apache service. The hosts file in the location /etc/hosts/ for the both clients are same ============================================= Do not remove the following line, or various programs that require network functionality will fail. 127.0.0.1 localhost.localdomain localhost Local LAN 190.0.0.1 client_1.Example.com client_1 190.0.0.2 client_2.Example.com client_2 HR LAN 10.1.74.2 client_1hr peer 10.1.74.3 client_2hr ESP LAN 10.69.69.1 client_1esp 10.69.69.2 client_2esp Any help will be appreciated. Thanks in advance, Jack F

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• Sending a file to uCLinux

  - by Mike

  I have a board running uClinux, and I need to send a file to it, but I'm not sure how... I have a RS232 port, and Ethernet port with an IP address at my disposal, I can telnet to the board, but uCLinux doesn't have a built in FTP client. What sort of options do I have here for transferring files from my Windows 7 (or OpenSUSE) machine(s) to this board? EDIT I just found I have a TFTP server on it: # tftp BusyBox v0.60.5 (2012.07.09-14:05+0000) multi-call binary Usage: tftp [OPTION]... HOST [PORT] But I can't find any good information on how to use TFTP. And looking around google I'm seeing it's good for loading binary images, so I'm assume anything could be sent, but I'm not sure.

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• Outgoing only SMTP server

  - by Din

  I want to setup on my Debian outgoing only SMTP server, so my Web-applications will be able to send mail via it. I don't want to use other hosts because of security and customizability of my own setup. I want to setup Postfix and configure it only in outgoing mode (I don't want it to be a relay). So I want to ask an advice how to do it in the best way. There's no need in users, virtual users, endpoints and other options that Postfix provides. I suppose that I should only attach Postfix to some hostname so my IP address can resolve to it. I also think that Postfix maybe a bit complicated solution for this task. If you know much simpler tool for it, let me know. Thanks.

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• How to add a second domain to an EC2 instance with Elastic & Route 53

  - by memeLab

  I've got my domain site.com running on EC2, using Elastic IP and Route 53. I want to park site.net so that it resolves to the same site.. I've looked up Migrating an Existing Domain to Route 53 in the docs, but can't find mention of how to add a second domain! I figured I'd have to create an A record, but when I do so, the record is created site.net.site.com .. not quite what I'm after! I've also done searches for mixes of 'route 53', 'park domain', 'addon domain', 'second domain', but no dice... My prior experience is with cPanel and Plesk, so I'm a bit lost! Any pointers would be appreciated! TIA

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• Where might I be having problems with making web server acessable (XAMPP)

  - by Erx

  I've installed XAMPP and it seems to be working - sort of. It will serve pages if I access it via http://localhost or 127.0.0.1 but not if I use the actual IP address I have. I thought it might be a firewall issue, so I turned off the firewall and the issue still remains. I don't have enough experience to know where to look next, so I thought I might get some advice here. Running on Vista. The error I'm actually getting it "Timed Out". I've had XAMPP running on this machine prior, but I've had to reinstall my OS/new hard drive ... and I can't seem to get it working.

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• Tracing out going connections

  - by Tiffany Walker

  Jan 24 07:00:49 HOST kernel: [875997.380464] Firewall: *TCP_OUT Blocked* IN= OUT=eth0 SRC=108.60.11.15 DST=74.80.225.32 LEN=52 TOS=0x00 PREC=0x00 TTL=64 ID=18789 DF PROTO=TCP SPT=64823 DPT=81 WINDOW=14600 RES=0x00 SYN URGP=0 Jan 24 07:00:50 HOST kernel: [875998.378321] Firewall: *TCP_OUT Blocked* IN= OUT=eth0 SRC=108.60.11.15 DST=74.80.225.32 LEN=52 TOS=0x00 PREC=0x00 TTL=64 ID=18790 DF PROTO=TCP SPT=64823 DPT=81 WINDOW=14600 RES=0x00 SYN URGP=0 I run fcgid so everything runs as a user. But is there a way to trace and figure out who is running an out going script? The sites all share the same IP so it's hard to know which site it is or where the script is located at.

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• How can I display host name on windows desktop

  - by Martin

  I do a lot of work on Windows Server 2008 remote desktops and often lose track of which host I am currently logged on to. Is there a way of displaying (without installing any non-standard apps) the host name or IP address of the host I am connected to in either the wallpaper or the notification area? I tried creating files in the desktop with the name of the machine - but my roaming profile shows the same set of desktop files on every machine, so that was scuppered. Duh! In shell windows this is easy: just set the prompt to display the host name. Surely there is a simple way of doing the same for the graphical desktop.

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• how do I create a bidirectional bridge using iptables

  - by Kolzoi

  Setup: I have a samsung LCD TV that is connected via eth0 to a T41 Thinkpad running Ubuntu 10.10 which is wirelessly connected to the home router. I am trying to get Samsung's remote control app working on my iPad but the app won't allow me to put in an ip address and only discovers the tv if it's on the same subnet as the iPad (lame). So I need the laptop to route packets from eth0 to the wireless interface (wlan0), and I need about 3 ports on the wlan0 interface to be forwarded to the samsung tv. Hopefully all this makes sense. I've been messing around with iptables and samsung is now able to access internet via laptop wireless, but mapping from wlan0 back to the samsung tv is eluding me.

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• Concurrent wireless and wired network

  - by Stew Megaw

  Hi, I am concerned with maintaining a wireless and wired network connection on my laptop. Basically I can change the metric on each interface so that Windows prefers one connection over the other. I am wondering is following scenario possible.... Some applications uses the wireless while other applications use the wired... I want Internet Explorer (only) to use the wireless connection while Outlook and everything else uses the wired connection. Perhaps adding some lines to the routing table might work? - Adding the ip addresses of websites I want to view via the wireless connection? Many Thanks in advance for any replies!

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• VLSM help required

  - by user68062

  I have confused myself following a VLSM tutorial and need to get my understanding confirmed, would this be the correct format, or am i away off again 172.31.0.0 VLSM this network address for as many subnetworks as possible, with no more than 14 hosts in each subnetwork. Show the subnet mask used. As the ip address is class b and contains 16 bits in the network portion, this means that we can have 2^16 = 65536 possible networks, to give each of these networks a maximum of 14 hosts we would use the subnet prefix \28 for each subnet. Is this correct? Thanks BB

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• Default documentroot apache does not work

  - by James Wise

  I have apache version 2.2 and php 5.3.15 on a single server. I configured virtual hosting and a default vhost. 0_default_.conf - goes to /var/www/default sub.domain.com.conf - goes to /var/www/sub.domain.com My question is, how could I set the default documentroot to sub.domain.com permanently? That means all request should be redirected to sub.domain.com. I try to remove 0_default_.conf but when viewing the page it display the php source code of sub.domain.com. Here is my configurations -- http://pastebin.com/4e3awUJ4 Although I can create index.php to /var/www/default and permanently redirect to sub.domain.com site but it's not viable solution for me because what if I didn't point the ip address of sub.domain.com to the server so user cannot view that subdomain. I would appreciate if anyone could share their knowledge and wisdom. Thanks. JamesW

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• Apache mod_remoteip and access logs

  - by GioMac

  Since Apache 2.4 I've started using mod_remoteip instead of mod_extract_forwarded for rewriting client address from x-forwarded-for provided by frontend servers (varnish, squid, apache etc). So far everything works fine with the modules, i.e. php, cgi, wsgi etc... - client addresses are shown as they should be, but I couldn't write client address in access logs (%a, %h, %{c}a). No luck - I'm always getting 127.0.0.1 (localhost forward ex.). How to log client's ip address when using mod_remoteip?

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• Multiple subnets behind SonicWall TZ 180

  - by Derek

  We have a SonicWall TZ180 that acts as a VPN endpoint. Right now it has one WAN IP address and a /24 assigned to the LAN interface. Our mail cluster administrator asked if it was possible to add a second private class C behind the VPN. This second subnet would be available to the other network and then we would use address objects and acls to limit access. Is this possible? I read up on PortShield but I don't know if that's what we would need to use because we're pushing all data out of one physical port into a Cisco switch that has VLANs already set up. Addendum: It appears that PortShields will do what I want with only one limitation; it requires a direct 1-1 relationship of portshield to physical port. This would then limit us to 4 PortShields on 1 TZ180. Is there a better solution than this?

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• Getting IIS redirects proper for second HTTP site

  - by Gotenks

  2x IIS sites on one host. I have mainsite.domain.com and secondsite.seconddomain.com. Both sites point to the same IP in public DNS. Nothing wrong with mainsite.domain.com, it redirects and goes to its own HTTPS site without issue. Going to secondsite.seconddomain.com without HTTPS, it re-directs me to the HTTPS mainsite.domain.com when I want it to go to its own secured site. It's odd that HTTPS secondsite.seconddomain.com still works as expected. Is there anyway to make HTTP of secondsite.seconddomain.com redirect to its own HTTPS entry?

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• Able to send, but not receive from gmail.com within Outlook 2003 (0x800CCC0F)

  - by matt_tm

  In my home network, I'm able to access my @gmail.com and @otherdomain.com accounts via POP3 from Outlook 2003. When accessing from my office network, I'm not able to receive, but am able to send. I get the following error: Task '[email protected] - Receiving' reported error (0x800CCC0F) : 'The connection to the server was interrupted. If this problem continues, contact your server administrator or Internet service provider (ISP).' The POP3 is set to 995 (using SSL), SMTP to 465 (using SSL), Logon using SPA is NOT enabled. There is NO change I make on my system from the office to home network, except my local, internal IP address changes.

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• Cisco 2900 series router - 3x 3g HWIC - Can you use the same subnet for each HWIC?

  - by Lance

  We host a site with a 2900 series router with 3x 3G-HWIC cards installed. It is hosted with telstra and plugs into our corporate WAN. The card authenticates against radius and advertises a route into the WAN for which subnet it routes for. We have always used the same advertised subnet on each. Telstra have advised us that this could be the cause of some drop out issues whereby some services will work for some people and not for others and are saying effectively that their system will only use one of these at a time even though we can see the interface is online and assigned a WAN IP address. Has anyone out there configured a multi HWIC setup before and if so are they using different subnets for each or the same?

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