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• Can't connect to web-server on local host behind NAT

  - by eyeinthebrick

  I got Ubuntu as host. I'm running a web-server on http://192.168.199.8:80. It is accessible from the local network, but when I'm trying to reach it by external IP, I go to my router's web-page. I arranged port forwarding on router for port 80 to my local IP 192.168.199.8. Unfortunately web-server is still unavailable via external IP. I checked whether the port is open via http://www.canyouseeme.org/. As it showed that the port is unavailable, I changed port used to 3659 (not forget to rearrange port forwarding rule). Although http://www.canyouseeme.org/ shows that port 3659 is open, I still can't reach my web-server. Where can the problem be?

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• Why does my flash video get stuck? (not lag?)

  - by Sk606

  After moving to Ubuntu 10.10 Netbook Edition, I've noticed a strange problem that manifests itself most obviously with streaming videos like youtube and hulu. The video will load and begin playing fine and eventually stop, as though it is buffering. However, it usually happens between 40 and 60 seconds into the clip. The loading indication however shows that it actually isn't buffering anymore of the data, and will just sit there. If I force the clip forward (e.g. click to start the movie somewhere ahead of the stall point) the clip will usually reload quickly and begin playing as expected. Because of the quick load times, and the consistent stop of video, I don't think the problem is related to hardware performance or network throughput. Also, I have none of these problems in 10.04. Rebooting into 10.04 makes the problem disappear. However, one more clue, I also have noticed a higher occurrence of web pages that simply "stop loading" - say, 1/10 clicks while browsing I have to hit "reload" to get the page to load because the page timed out part of the way through. This seems strangely related to the video problem, though is a lot less infuriating. Help! Where do I begin to look with a problem like this?

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• Masquerade traffic from certain source IP to VPN connection

  - by Shuo Ran

  Network Setup: 10.0.0.1 Router: to internet 10.0.0.70 Server: Ubuntu based server,default gateway is 10.0.0.1 10.0.0.51 PC I created a PPTP connection(interface: ppp0) on Server to a machine on the internet, what I want to do is route all the traffic from certain IP address(10.0.0.51) through the PPTP connection and then to the internet. What I did are: Set the gateway on PC(10.0.0.51) as 10.0.0.70 Enabled ipv4 forward on 10,0,0,70 Add the masquerade rule to iptable: iptables -t nat -A POSTROUTING -o ppp0 -s 10.0.0.51 -j MASQUERADE After that, it seems none of the traffic from 10.0.0.51 be redirected to ppp0, instead these traffic are still going through 10.0.0.1 directly. Any thoughts on it?

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• Open source monitoring tool without sending data to "Their Server"

  - by hangu

  I trying to use open source server monitoring tool. I know there are a lot, but I couldn't find what I need.. the basic process of monitoring tool I used to use before was, 1) Install agent in my server which I want to monitor 2) The agent send data to "their server" 3) I can check the health of my server through web browser presented by them. What I need is, avoiding "Step 2". Are there any monitoring tool that I can use? I have Windows 2008 and Linux servers simple feature will be enough like (CPU, Memory, Network..) Thank you

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• How to determine if my router is causing a bottleneck in uploads?

  - by Jimi

  I have a home network with a cheap-o little router with a development server and a few devices hooked up to it. I am finding that backups of my server are taking FOREVER (a week for 60gb) running backups renders my internet connection useless from any other box int he house. I have maxed out the pipe to my house from the ISP (10down, 3up), but is there a way for me to test and see if my router is bottlenecking anything? I feel like 60gb backups shouldn't take this long so any help would be great!

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• Fresher in Linux administration [closed]

  - by user127452

  i am fresher in the administration field & i just got the job as a linux support executive,though i have basic knowledge of linux .. the server handling,configuring & network related issues are a new part for me.So i am confuse for where to start with the basic requirement that linux admin should know & how to & from where to study about it .. we hav a 6 working days for +9 hours each ..so it is not possible to join any RHCE course or classes .. so please help me regarding to this issue as the there was no proper handoff is done from previous employer ... & now there is a lot work pressure on me ... so please suggest me something ... :)

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• Configure Linux server hardware buttons for soft reset or power cycle?

  - by Jakobud

  I have a small modest CentOS server at home. I run it headless because anytime I access it, it's always via SSH. Anyways, tonight it became unresponsive to the network. I could not connect to it to investigate. In this case, I have to hook up a keyboard and monitor to see the problem. I ended up just rebooting it. But after this experience, I was wondering if it's possible to configure the hardware buttons on the CPU case to perform a graceful reboot or graceful power cycle in Linux. Even though the server becomes unresponsive once in a blue moon, it would be nice to simply press a button and have it shutdown all services and gracefully reboot. Anyone know how this could be accomplished?

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• Access denied for user 'root@localhost' (using password:NO)

  - by murgatroid99

  I am attempting to install a network management package called cacti onto Ubuntu running under Windows Virtual PC. I attempted to install MySQL as it is one of cacti's dependencies. I can install and start the MySQL server, but whenever I try to access it in any other way, such as to change the password, I get the error message Access denied for user 'root@localhost' (using password:NO). I would like to know what is causing this and how to fix it. Edit: (just in case my comments are not visible) The answers from HD and Devin Ceartas did not work for me.

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• svn client timeout on windows 7 64 bit

  - by nopuck4you

  I upgraded my PC to Windows 7 64 bit Home Premium - clean install. Since then I've tried to install the following SVN clients: Tortois 1.6.6 64bit and 32bit, Tortois 1.6.5 64bit, SlikSVN, SmartSVN, and a couple others. None of them will connect to ANY remote SVN repository. Note: Everything works correctly when I plug in my old Vista HD with Tortoise 1.6.6 client installed. Therefore, I do not suspect the network per se. I've seen some posts around with people running into similar issues on Windows 7 64bit but I've yet to see an actual answer/solution to the problem.

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• How to set up server to be accessed from mobile devices [closed]

  - by Kgrover

  I need to set up a server that will eventually be accessed from an Android application. I don't have experience with how to go about this, but I've seen MySQL servers (Amazon EC2). I would need to store data on the server remotely (again, from a mobile device) and fetch it to display. What would be the best kind of server to use? I'm guessing I would only need around 50 GB of space. Is it possible to use a network drive and set that up as a remote server with an IP address? I would need to upload and extract data through java on Android. This is my first question on ServerFault, and I'm not sure if it's the appropriate forum. If not, please redirect me.

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• Name-based virtual hosting in Apache

  - by malvikus

  I'd like to set up name-based virtual hosting in Apache, but I don't have DNS name (local private network). Thus I want to get something like that: http://192.168.0.1/wiki - First virtual host - wiki. http://192.168.0.1/redmine - Second virtual host - redmine. As I suggest I can be achievable by using ServerName option in section of both vhosts. But in Apache documentation has no mention that I can use for FQDN IP-addr. Is it possible? How can I reach my wishes? P.S.: I want to share my sites on the same subnet only. Thus any who can ping me can enter http://my_ip/wiki and get wiki, http://my_ip/redmine and get redmine.

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• Best Linux distro for media server on older box

  - by fauxpride

  I have an older machine with these specs: CPU: AMD Athlon X2 @ 2,8 Ghz, 2MB L2 RAM: 4 GB DDR2@ 800 Mhz GPU: Asus 4890 TOP 1 GB I want to turn the machine into a media server via XBMC (so good video and wireless peripherial driver support would also be a plus), but I also want to use it as an OpenVPN server so I can tunnel RDP to my other Windows machine in the network. I mostly want to use a Debian based distro (for the convenience of apt) and right now my options are: Ubuntu, Xubuntu or Mint. Which one do you think is more fitting? Thanks in advance.

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• phpMyAdmin tried to connect to the MySQL server, and the server rejected the connection [closed]

  - by Sagar Thapaliya

  i have some problem i had skpe on my laptop and unfortunately skype used 80 port for network and wamp server 2.0 Apache Version : 2.2.10 PHP Version : 5.2.7 i changed the port of wamp server through Listen 12.34.56.78:80 Listen 80 Listen 12.34.56.78:80 Listen 8080 and i able to do somehow but i can't access the phpmyadmin please help me i hope i can get my solution from all of you soon my errors seems this i have mentioned downstairs below phpMyAdmin tried to connect to the MySQL server, and the server rejected the connection. You should check the host, username and password in your configuration and make sure that they correspond to the information given by the administrator of the MySQL server.

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• Do any of the HP printers have implement printer sharing?

  - by BCS

  I've seen several (home grade) HP prints that have network port and allow connecting to them via that. However I haven't seen any way to use it without installing the printer specific drives. This seems a bit silly because I've seen printer sharing system (SMB I think) that didn't seem to need any printer specific software. My question is: Is there a way to use one of these with my printers? (I'm omitting the exact model in the hopes that answers for several models (or a resource that answers it for several models) will be given.)

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• 2 RJ45 connectors on a one WAN cable

  - by mr_stavo

  Hello, I encountered strange setup on a network at company where I do some work. They have internet connection from small ISP located in the same building, all I see is one CAT5 cable with 2 RJ45 connectors. One is going to WAN port on the router and another into LAN port on the same router. This is the only way for internet connection to work. I tried to connect my laptop to one of the RJ45 but it won't work. Now, what is the purpose for such setup?

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• Recommendation for hardware upgrade: thin clients? Or...?

  - by Alex C.

  I work for an animal shelter in Upstate New York. We have about 50 machines running XP Pro. They're connected to a Windows network with a domain. About half of these computers are used for nothing more than using two web-based apps -- one to keep track of our animals, the other to process credit cards. Having a full-blown desktop PC seems like overkill for this purpose. The PCs are three-to-five years old, and I'd like to come up with a plan to upgrade the hardware. Our donations are down (not surprising, given the economy), so cost is a big factor. Can people recommend some options? Some sort of thin client, maybe?

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• Why does my Windows computer immediately turn back on after sleep/hibernate?

  - by nbolton

  After clicking sleep or hibernate in Windows 7, my computer loads for a while and then goes into sleep mode, but not 1 second later it powers back up. The event log has no errors and no warnings appear when it comes back out of sleep/hibernation. Here's my system specifications: Asus P5KPL-VM Windows 7 I believe this is all that's relevant. I've installed the latest chipset drivers, but I'm unable to update my BIOS (but this is another matter; maybe because the motherboard in the V3-P5G31 bundle is different). I've also tried turning off the "Allow this device to wake up my computer" for the network card, keyboard, and mouse -- but this makes no difference. If flashing the BIOS is the only thing that will fix this, then I will create a new question to this effect. Maybe I should change the suspend mode from S3 to S1?

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• How do I check if a process (Firefox) has quit?

  - by Al_Jehle

  I am using Ubuntu 12.04 64-bit, with all updates installed. I made a simple shell script that starts a SOCKS5 tunnel and launches Firefox (with correct network proxy settings) to use the tunnel. How do I recognize when Firefox has ended (when I close it) so that I can close the tunnel? Also, it would be awesome if I could run this in the background, but not necessary. #!/bin/sh ssh -fCN -D 10000 server.com firefox //To lauch firefox using Ubuntu ? Code to determine when firefox has quit Code that kills the tunnel

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• 1 Computer Pulls Wrong DNS Every Morning

  - by bradenkeith

  One of my users takes his laptop home, connects to his internal network fine. He brings it in every morning and since Monday - every morning it pulls the wrong DNS every time. It pulls 1 DNS: 192.168.1.1 which is the router. The DNS are external IPs. I have several users that take their laptops home and connect to other networks - what could cause this anomaly? He's booting up when he comes in the office and a simple ipconfig /release /renew fixes the issue.

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• Ubutu Server Edition: useful for the home user?

  - by D Connors

  My question is simple. What (if anything) does Ubuntu Server Edition have to offer to home users? This question is mostly out of curiosity really, but I like asking. I've got a home network set up here with some 6 to 7 machines (most Windows, one Linux). And I was wondering how useful would it be to have a dedicated computer in my house running Ubuntu Server full time. We've had an awful experience with file sharing so far, would it simplify file sharing/transferring? Would I be able to limit the internet bandwidth granted to each PC? Would I be able to monitor in/out internet traffic (both real time and monthly statistics)? Last, and most important, if I'm completely off as to what Ubuntu Server actually is, please say so. I am completely new to it.

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• Role of OSI layers when we open a url in browser?

  - by user2715898

  I have searched on this topic a lot but I am not able to understand how and where OSI layers (Application, Presentation, Session, Transport, Network, Datalink, Physical) come into picture in the whole process of opening a webpage in browser. I have read this - http://stackoverflow.com/questions/2092527/what-happens-when-you-type-in-a-url-in-browser?lq=1 and I know all the functions of all the layers that are there in OSI model. Also, do we use OSI model or TCP/IP in the whole process? Basically I am having problem linking all the things together. And please forgive me if there are resources out there that explain this concept. You can definitely point to them.

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• PHP/Oracle Connectivity randomly "drops out"

  - by user20555

  Hi! Here's the current situation - I have two web servers (for now named A and B) and two database servers (named C and D). The web servers are quite old, and are running an early version of Apache 2 + PHP4, while the DB servers are running Oracle 9i and 10g respectively. We're experiencing a strange problem connecting (via PHP code) to database A while on web server B only. Web server A has no issues at all... Randomly, web server B will report a "Not connected to Oracle" error (3114). I can't see a real pattern with this, but refreshing a few times seems to fix the issue. Apparently there are no drop-outs on the network interface, which leads me to believe that there's some misconfiguration between PHP/Apache and Oracle (which uses connection pooling). We're running SunOS 5.8... Any ideas?

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• Is there a way for me to test my [closed]

  - by Jimi

  I have a home network with a cheap-o little router with a development server and a few devices hooked up to it. I am finding that backups of my server are taking FOREVER (a week for 60gb) running backups renders my internet connection useless from any other box int he house. I have maxed out the pipe to my house from the ISP (10down, 3up), but is there a way for me to test and see if my router is bottlenecking anything? I feel like 60gb backups shouldn't take this long so any help would be great!

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• Long term system health monitor

  - by user30336

  As an experienced user, I sometimes notice that things are not going well with my computer. For example, my backup drive recently started cycling up and down, so I guessed it was probably dying, and replaced it. I detected this with my ears. Windows did not seem to notice or care. There ought to be software that monitors overall system health by keeping track of things like this, so that unusual events or increasing error rates will not be shrugged off. Among other things: disk errors that are recovered, corrupt network packets (at above the baseline expected rate) and crashes of trusted programs are early warnings. Is there any software that tries to use this kind of monitoring to warn of impending trouble?

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• Where do I read more about building an architecture like Google has? [on hold]

  - by user107148

  I want to develop a program that watches and traverses a rather big network for data. This data should then be available to search through with my program, maybe through a web interface or something. My intuitive thought at the moment is to build an architecture kind of like the one Google has. One "front-end" (the Google Search page) which is essentially a regular web application and one "back-end" (which in Google's case traverses the web). Now for the hard part: If I decide to make such a system, how should communication be done between these parts? One idea I had is to use some kind of database that both the back-end and front-end can access, but then comes the issues of concurrent writes and reads. Another issue with just using a database to communicate is that it makes it hard to "notify" the other part when something changes. Let's say that I want the "front-end" part to push changes to the UI when a change is noticed in the back-end. Then the back-end would have to have some way of notifying the front-end of this.

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