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• Can't find a wireless access point's IP address after changing router IP/LAN settings

  - by flagg19

  I have a modem/router, Netgear DG834, and a wireless access point (AP), Netgear WG602. The AP is directly connected to the router. My old working configuration was: Router IP address : 192.168.0.1 Access point IP address: 192.168.0.10 My new configuration is: Router IP address : 192.168.1.1 Access point IP address: ???.???.???.??? I changed my router's IP address/LAN settings to set up a VPN with another Netgear router that had the same LAN configuration. The wireless network is still up and perfectly working, but I can't find the AP's IP address. I've tried broadcast ping but the AP won't respond. I looked at the router "attached devices", but it's not there. I've played around with Nmap and arp request but the AP is totally invisible. I can fix it by resetting it to factory settings, but I'm very interested in learning more about this problem. I'm also interested in network security and this fact of having an invisible AP well, it's something I'd like to understand.

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• Distributed Server Monitoring Solution

  - by MaterialEdge

  I belong to an independent IT firm that manages and maintains about 50 business clients networks, ranging from small 5 system networks to 200+ systems. Because we are unable to directly monitor each server at these locations (distributed over a very large area) on a regular basis I am looking for a method to monitor and alert us to any problems that may arise so that we can respond quickly with, hopefully, preventative measures. I'm not sure what solutions are available for this type of situation, but something that utilizes a central server at our business with all client servers sending alerts or logs to it for daily monitoring might work best. All these servers are running a Windows Server OS. In your opinion, what would be the best course of action to accomplish this?

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• Can a named (bind) crash make a server unreachable?

  - by giorgio79

  My server recently became unreachable, and after restart a named error was the last line I found in /var/log/messages before restart: Jun 26 00:15:06 host named[1303]: error (network unreachable) resolving 'dlv.isc.org/DNSKEY/IN': 2001:500:71::29#53 Jun 26 06:38:55 host kernel: imklog 5.8.10, log source = /proc/kmsg started. Jun 26 06:38:55 host rsyslogd: [origin software="rsyslogd" swVersion="5.8.10" x-pid="1294" x-info="http://www.rsyslog.com"] start Jun 26 06:38:55 host kernel: Initializing cgroup subsys cpuset Can a named crash make a server unreachable? I doubt it, as I assume I should still be able to login with ssh via IP, but the server did not respond...So, I am trying to make heavy guesses here.

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• How to setup exchange server mail and address book accounts on mac - Snow Lepord?

  - by Abhishek

  I just got myself a mac, and I've been a long time windows user. So I'm exploring the built in apps, and I wanna setup my 3 mail accounts (1x gmail, 1x hotmail, and 1x corporate using google apps), but I want them to work the way they work on my iphone and my ipad - Using exchange... It really makes life easy to be able to receive and respond to mail instantly, not to mention the contact and calendar syncing... Any ideas? I have found the 'Exchange 2007' and 'Exchange IMAP' options when setting up the account, but things like the server address and all?

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• Rejecting new HTTP requests when server reaches a certain throughput

  - by Sam

  I have a requirement to run an HTTP server that rejects new HTTP requests (with a 503, or similar) when the global transfer rate of current HTTP responses exceeds a certain level. For example, if the web server is transferring at 98Mbps, and a new HTTP request arrives, we would want to reject this (as we couldn't guarantee a good speed). I've had a look at mod_cband for Apache, limit_req for nginx, and lighttpd's rate limiting features, but none of them seem to handle my (rather contrived, granted) use case. I should add that I'm open to using pretty much any web server, and am open to implementing this in iptables rules if someone can craft such a rule! (Refusing the TCP connection is fine, it doesn't have to respond with an HTTP 503). Any suggestions?

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• ESXi5 - management services crashes - vms running

  - by Frederik Nielsen

  I have a setup with two ESXi5 servers. We are(were) running with a ISCSi box to server disk for the VM's - however we are in the progress of migrating away from it, because the storage os disk is bad. Now, one of the ESXi hosts has been running for ~20hrs, and it seems like the management services just crashed on that host.. The vms are still running - so it's not really serious. However, I want to fix it. Should I be worried? Will the VM's keep running? The hosts does respond on pings. I am running a vcenter to administrate the hosts. Thanks in advance.

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• Windows XP: Slow start menu 'All Programs' response

  - by user17381

  When I click start, and then 'All Programs' (or select a sub menu of all programs) I get a grey menu which does not respond for about 5 seconds - after this it is ok. Any idea what is causing the menu to behave sluggishly? What can be done to fix this? Thanks Info Requested System Specs : Core2 T5500 @1.66GHz, 2GB Ram Windows version: XP Professional SP2 Happens Every time I click the menu (not just first time), has gradually been getting worse. Nothing too unusual at startup: ComodoFirewall, AVG AV, Truecrypt (only for small volume). AV Software: AVG.

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• Transferring NS records to a new server

  - by lanemiller

  I feel like that was NOT worded well, but here is my current predicament. I recently had a GoDaddy dedicated server, and decided after their customer support failed to do anything but disappoint, to switch to Rackspace. We have 2 ns records that point to our godaddy server, and we have a few sites left on the server, that rely on it for their DNS zones, and the owners of the domains fail to respond to us. So, the question is, if I need to transfer the sites off of the OLD godaddy NS, can I point the A records from my ns1.domain.com and ns2.domain.com to match up with IP addresses of the Rackspace nameservers? OR, do I cname my NS records to match the rackspace ones? I DO know that this isn't advised, either method, but I need to get these sites moved before Godaddy tries charging another $2k for the server.

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• Azure VM : Connection refused by host

  - by Simon Kérouack

  I recently stopped a subscription with 14 VMs in it and restarted it a few days later. Now all my VMs are working just fine at the exception of 6 used for MongoDB. They respond to ping and so they show as online in the azure dashboard but they do not answer to anything else. I tried (from different locations, in and out of the azure cloud) ssh : connect to host * port *: Connection refused telnet : Unable to connect to remote host: Connection refused mongo : exception: connect failed The ports for ssh and mongo are opened in azure. I tried restarting the VMs a few times trough the azure dashboard, they seem to restart successfully but still refuse all connections. I already looked for similar issues and the best solutions I found was to wait... the issue has been happening for 7 days and waiting is no more an option.

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• Can you share wisdom on using HISTIGNORE in bash?

  - by sage

  I was reading the manpages for bash on the plane and I stumbled across the HISTIGNORE variable. To test it out, I immediately edited my .profile to define this variable: export HISTIGNORE=ls I tested it out and this is great! It excludes plain 'ls' commands from my history without excluding more interesting commands with lengthy paths, but having recently harvested a great deal of wisdom from SU I am eager to know what other commands superusers might recommend or other lessons learned. What can you share about using the HISTIGNORE variable in bash? (Note: I'm about to board my next flight and I have obligations upon arrival, so I will be absent for a number of hours before I can respond to comments...)

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• Co-worker told me ubuntu server LTS is not built for production env

  - by Sandro Dzneladze

  I was confronted with a very vague statement today, but unfortunately I had no clue how to respond or analyse this. Co-worker told me ubuntu server LTS is not built for production env. What is there that makes it not built for production environment? (obviously no answer followed, so this is my question to you...) is it ...packages? ...ease of use? ...supported systems? ...stability? ...support? ...popularity?

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• Windows 2008 - Define IP Order by port or service

  - by Josh

  I have a Windows 2008 server that has three IP bound to the NIC. I can select which IP Windows SMTP listens to, but I want to also set the IP address used when mail is sent. Where would I set which outbound IP to use when sending email? Without using real IPs, here is an example what I have setup. Three IPs associated with the server: 10.0.0.1 10.0.0.2 10.0.0.3 I setup the binding on 10.0.0.2 for port 25 in the SMTP server settings, so that it is the only IP that will respond for inbound. When I look at the email header from an email sent from that server, it lists the server with an address of 10.0.0.3. I would like it to use 10.0.0.2 so that when reverse DNS is performed, it maps back correctly.

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• Asterisk: forward if peer unreachable

  - by Cedric H.

  I would like to respond to incoming calls by checking is a specific peer is reachable, and dial the appropriate number accordingly. Presently I did this: exten => 1200,1,Answer() same => n,Set(reachable=${SHELL(asterisk -rx "sip show peers" | grep ^cedrich-phone.*OK)}) same => n,GotoIf($["${LEN(${reachable})}" = "0"]?extoffline) same => n,Dial(SIP/cedrich-phone,20) same => n(extoffline),Dial(SIP/another-phone,20,tr) same => n,Hangup() Could you tell me if this is acceptable and if it can be improved ?

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• Typical Service Response Time for software verndors [closed]

  - by Miky D

  I'm trying to find out what are the standard service/tech-support response times that are expected of a software vendor. We're being asked by a customer to enter into an agreement regarding technical support for a software application that we're selling. Basically, I'm interested in the typical turn-around time (i.e. time to respond, time to resolution) based on the severity of the issue. And also, I'm interested in the financial structure of such agreements: i.e. charge/incident, bundle with unlimited incidents/customer etc. Any information or suggestions of where to find such information (even examples of other software vendors websites) would be greatly appreciated!

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• Ubuntu (desktop) server needed for school

  - by Dave Moody

  I need to build an ubuntu server for school, but I hate with a passion command line interfaces. I need a server with a desktop, like the current win server 2003 (which has crashed, ugh). This server needs to host the school lan domain, have an active directory, and handle the roaming profiles that the students and staff access through WinXP workstations. It also needs to work as a file server, maybe a print server. Can anyone advise me on how to create an Ubuntu server starting with Ubuntu Desktop edition? Much thanks if you respond... Dave.

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• Strange PHP output buffering

  - by radek-k

  PHP: header('Content-type: text/plain'); for ($i=0; $i<10; $i++){ echo "$i\r\n"; ob_flush(); flush(); sleep(1); } I tried script above on 2 different servers. Both respond numbers 0...9 in every line. In case of first server each number is received every second. In case of second server there is no output for 10 seconds and entire output is displayed at once. What might be wrong int second case? I tried various uutput control Functions but it didn't help. Set of response headers in both cases is pretty much the same: HTTP/1.1 200 OK Date: Mon, 03 Jan 2011 19:21:21 GMT Server: Apache X-Powered-By: PHP/5.2.14 Keep-Alive: timeout=15, max=100 Connection: Keep-Alive Transfer-Encoding: chunked Content-Type: text/plain

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• Windows 7 does not 'wake up' from Sleep mode

  - by the watchmaker

  I'm new to Windows 7, so I don't know if this is normal. When the computer is idle for 30 minutes, the screen goes black and no key pressing or mouse movement will bring the computer out of standby. The computer is still running (fans and hard drive noise) but it will not respond and the screen remains black. The only way to get a response is to press and hold the power button until it goes off, then switch it back on. When it turns on it says "Resuming Windows" and then goes black again. Is this normal? Can the time-out delay be increased? Is there a better workaround than switching the PC on and off?

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• Routing based on source address in Windows Server 2008 R2

  - by rocku

  I'm implementing a direct routing load balanced solution using Windows Server 2008 R2 as back-end server. I've configured a loopback interface with the external IP address. This works, I am receiving packets with the external IP address and respond to them appropriately. However our infrastructure requires that traffic which is being load-balanced should go through a different gateway then any other traffic originating from the server, ie. updates etc. So basicly I need to route packets based on source address (external IP) to another gateway. The built-in Windows 'route' command allows routing based on destination address only. I've tried setting a default gateway on the loopback interface and mangled with weak/strong host send/receive parameters on the interfaces, however this didn't work. Is there any way around this, possibly using third party tools?

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• ssh freezes when trying to connect to some hosts

  - by NS Gopikrishnan

  When I try to ssh to particular machine/s in a list, The SSH command happens to be freezing. I tried out setting ssh timeout. But then also it's freezes even after the timeout. In verbose mode : OpenSSH_3.9p1, OpenSSL 0.9.7a Feb 19 2003 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * debug1: Connecting to x358.x.server.com [10.x.x.x] port 22. debug1: fd 3 clearing O_NONBLOCK debug1: Connection established. debug1: identity file /export/home/sqlrpt/.ssh/identity type -1 debug1: identity file /export/home/sqlrpt/.ssh/id_rsa type -1 debug1: identity file /export/home/sqlrpt/.ssh/id_dsa type 2 At this point it freezes. A work around I thought was to create a child process for each ssh calls and if the process doesn't respond after a timeout - Kill it. But are there any less complex ways, so that I can accommodate it in a shell script itself rather than going for a C/C++ program ?

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• Windows Explorer not responding

  - by William Barnes

  I am running W7 64bit on an AMD Quad 1.8Ghz processor. I have a 500GB system drive and added a 1TB drive. Windows Explorer does it's "not responding" thing regularly. I read the other posts and ran SCANNOW and it came back clean. I also ran AUTORUNS and disabled everything that was not windows related. No luck. I booted in safe mode and it appears that explorer works, but I don't know why. I did read a post awhile back that it could be a Service program that makes explorer not respond. I forgot to bookmark the site and don't remember how to turn off the SP's without crashing the entire system. Any help or suggestions will be appreciated. I have also run CHKDSK on all drives, and there were no errors found. EDIT: It has been in for about 2 years and the problem started about 4 or 5 months ago.

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• Windows screen resolution change: lengthen timeout

  - by Jonathan J

  Occasionally I need to change the screen resolution of the console of a Windows virtual machine using XenCenter. When you attempt this change, Windows will revert if you don't accept the changed resolution within 15 seconds of clicking 'apply.' (Normally, this is a good thing.) The problem is that if I have a slow connection between XenCenter and the Xen hypervisor, the virtual console display may not refresh quickly enough to allow me to respond within 15 seconds. As a result, I can't change the resolution, even though the new resolution is valid. Is there a way to increase the timeout before reverting to the original display resolution?

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• DHCP server inside a virtual machine can't see other machines

  - by William

  Hi, I setup a private network from virtual machines and one of the machines is the DHCP server for the group. I want to specify a next-server for the DHCP server but I'm having trouble connecting to any of the machines that I lease IPs to. I'm just trying to do a simple ping/ssh to 10.0.0.252 (a machine with a lease) but it doesn't seem to respond. Any advice? I'm assuming I need to be able to connect to my next-server but maybe I'm wrong. Thanks.

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• Force shutdown a pc stuck in updating via Team Viewer

  - by Martheen Cahya Paulo

  Before I left office, I shutdown my work computer, leaving it in "Please do not power off..." screen. Now, when I log on to my own computer, I saw in Team Viewer that it's on. I thought it restarted instead of shutting down, but when I connect to it, it's still stuck in the previous screen. I've tried sending Ctrl-Alt-Del, but it seems to ignore it. I could still change its resolution via Team Viewer, and the fact that it respond my connection means it's not completely stalled. Is there anyway to shutdown it via Team Viewer?

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• Eliminate single point of failure for webservers?

  - by George Bailey

  I know in DNS, that each of the DNS servers will be tried to see if they will respond I know in email that in the event of a failure it will go to the next one in the list or it will hold the mail for a period of time As far as I know,, in webservers,, the browser will get one of the webserver IP addresses and try it and if it fails it will give up. Is this correct? If so,, then the only way to direct traffic away from a failed IP address would be with the DNS servers.. and even that would not update immediately?

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• Returning "200 OK" in Apache on HTTP OPTIONS requests

  - by i..

  I'm attempting to implement cross-domain HTTP access control without touching any code. I've got my Apache(2) server returning the correct Access Control headers with this block: Header set Access-Control-Allow-Origin "*" Header set Access-Control-Allow-Methods "POST, GET, OPTIONS" I now need to prevent Apache from executing my code when the browser sends a HTTP OPTIONS request (it's stored in the REQUEST_METHOD environment variable), returning 200 OK. How can I configure Apache to respond "200 OK" when the request method is OPTIONS? I've tried this mod_rewrite block, but the Access Control headers are lost. RewriteEngine On RewriteCond %{REQUEST_METHOD} OPTIONS RewriteRule ^(.*)$ $1 [R=200,L]

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