CentOS 5 Networking :: SSH Either Times Out Or Refuses Connection
Apr 2, 2009
I'm trying to setup a ssh connection from to my house that way I can learn Linux on a box that won't make my boss the sys admin (Im help desk) grind his teeth. He say that ssh port is allowing connections out of the firewall but not in so I can connect to my house. However If I try to connect to my box I get a message stating that the connection has time out. I have port forwarded the 22 to my box and have even changed the port to see if it is my isp blocking me. I am able to connect via SSH internally but when I try outside my house I am running into trouble. I looked up how to disable my fire wall and as far as I know it is.
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Jun 6, 2010
I dual boot windows xp and ubuntu 10.04 LTS and the wireless card works perfectly fine in xp so I know its not a hardware/network issue. In ubuntu, it detects wireless networks, will connect to network and work for about 20 seconds.
[Code]....
and it continues on after this alternating between a normal 20ms and high ping over 200ms. The connection refuses to load anything off the internet/local network.
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Feb 20, 2010
I recently started attending University and there is a filesharing hub set up throughout the dorms. I want to connect to it using LinuxDC++ but the connection just continuously times out. I have used DC++ before on Windows and never had any troubles so I am thinking it is something to do with networking in Linux (I have only been using Ubuntu for about a month).
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Dec 16, 2010
Wrong prefix, its Ubuntu not Lubuntu. Three devices:
Laptop 1:
---Can ssh to any device.
---Accepts any internal ssh.
Desktop 1:
---Can ssh to any device.
---Accepts any internal ssh.
Desktop 2:
---Can ssh to any device.
---Can ssh to itself through localhost or 192.168.1.130.
---Any ssh(and telnet) aimed at this device times out.
All three devices recently had openssh-server installed yet only one seems deviant. I've been trying to ssh into desktop 2 to no avail, yes the machine is reachable, yes sshd is running, yes ufw is disabled, and no there is no external firewall that I know of. Anything else I can try? The router for the LAN being dd-wrt.
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May 17, 2011
I had recently installed Ubuntu 11.04 (64-bit) and I have trouble loading websites. I use a DSL (PPPoE) connection from NetworkManager to connect to the internet. Some sites like this forum site, stack overflow, etc. do not load. Firefox 4 says 'loading...' and then finally times out. I can ping these sites though.
I tried 'wget stackoverflow.com' and Lynx both timed out. wget sends out a request and waits a long time for response before timing out. These sites load perfectly well on my Fedora 14 (64-bit) & Windows XP installations and both these OSes have Firefox 4. From this I assumed that this is not a problem with Firefox (or any other browser for that matter) but it has got something to do with the network configuration.
I faced the same problem with Ubuntu 10.04 too. I use a Dell Inspiron N5010.
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Aug 3, 2011
My desktop computer, running 11.04 (fresh install) sometimes can't establish a wired Ethernet connection. Sometimes when I boot, it keeps trying to establish, but with no luck. I keep trying to choose "Auto eth0" from the networking menu, but still, it doesn't succeed. If I reboot, it sometimes works. I can't establish a connection about half the times that I boot.
The computer is connected with a cable to a router ("Belkin Wireless Pre-N router"), and the router is connected with a cable to a cable modem.I've been using Ubuntu for a while, and I've had a problem for the past few versions (since around 10.04)? I thought that it might be some old issue that got resolved, so I did a fresh install of 11.04 today, and still have the same behaviorI'm willing to try things next time I can't get a connection, but don't know what.
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Jun 30, 2009
I've just set up a PC with CentOS 5.3 runing on near identical hardware to an existing 5.2 machine. Motherboard is Asus M2A-VM which I discover by chance generally works very well with CentOS. Ethernet is on board Nvidia.The older machine just did run gigabit speed without any intervention at all, rather to my surprise. The newer machine insists on running at 100 Mbit which is annoying as it is connected to a NAS through a gigabit dumb switch.
The obvious difference between the two is that ethtool on the older machine says that supported ports are TP, and so the port is TP. Whereas the newer machine says that supported ports are TP or MII and insists on running MII. I cannot change this with ethtool -s eth0 port tp. Perhaps not too surprisingly, mii-tool says that the supported speeds range up to 100 Mbit.
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Jun 20, 2011
I have been having trouble with Ubuntu 11.04 when connecting to the Internet via Wireless Networking. It will connect, and has good speed once it connects, however it takes upward of 10 minutes and over 20 times of me clicking 'Connect'.
Is there a way to connect to a wireless network quicker? My network is unsecured and without a keyring. It is not only slow connecting to my network, but the network of other's.
lspci information:
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Jul 6, 2009
I run a CentOS 5.1 using VMServer on XP. From home I can successfully 'cvs login' to my CVS server. But starting 'cvs update', the connection times out.
Netstat shows the connection as established:
# netstat -an | grep 2401
tcp 0 0 192.168.1.35:58651 85.25.xx.xx:2401 ESTABLISHED
CVS server is domain managed with dnsalias service (dyndns.org)
Using the same computer at work (other ISP) I have no problems - cvs update works just fine.
Can I assume that it is not a port/firewall issue, since "cvs login" is successful? Any clues where to start diggin'?
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Jan 4, 2011
I just installed 10.10 (2.6.35-24-generic) and my wired network connection is cutting out. I'm dual booting with Windows 7, and it works fine over there. I'm confident it's not a hardware issue. It works initially, but after a few minutes (this varies) the connection will drop out. If I'm on Firefox, I'll get "Loading" until the connection times out. If I'm using RDP to a local computer, I'll lose the connection. When it happens, if I ping a local computer, I'll get:
[Code]....
So I'm getting a bunch of packet loss. Some of the time, once the packets do start going through again, Firefox will finish loading the page. Other times, I have to click on network manager and click on "Auto eth0" which will give me the "connection established" message, and kick the network card back into gear. Sometimes I have to do this several times. It never shows as disconnected, but this somehow gets it going again.
[Code]...
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Jan 10, 2011
I had Ubuntu guest installed on VMWare. The Host OS is Windows 7. But now I want to migrate it to Virtual Box. I migrated it, but it does not allow PUTTY to connect it. It says "connection refused". On VMWare on same host and same guest, PUTTY connection is successful. But it does not allow on Virtual Box. It says connection refused. Both on VMWare and Virtual Box, the guest Ubuntu is configured using NAT networking.
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Sep 5, 2011
I have local and remote networks that have various printers. I can add any printer (local or remote) to any PC, except for one PC that's refusing to allow remote connection (it used to, but doesn't now!). The problem PC has two printers connected and work OK as a local printer, but both display same problem when attempting to connect from any remote PC via YaST. Using 'Connection Wizard> CUPS Server' connection method requires IP address of remote PC and printer name. But if I correctly select either of the two printers I get an error message:
"PING 192.168.1.149 (192.168.1.149) 56(84) bytes of data.
64 bytes from 192.168.1.149: icmp_seq=1 ttl=64 time=1.12 ms
Both printers are set to 'Accept Print Jobs' and 'Share Printers> Allow remote access' permits all networks to connect. why this PC is requiring the root password?
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Mar 23, 2010
my wireless will connect to a well known connection but will sometimes drop the connection then tries to reconnect. Sometimes it will reconnect w/o a problem but most times it will fail and when it fails it will refuse to even recognize that same wireless connection.
If by a small chance it does recognize the network then when you click on it, it will ask you again for the password, which is already saved onto the computer. After entering the password it will try to reconnect, then fail.
Only solution is to reboot.
I was wondering if there was an easy temporary fix of just reloading the software that controls the wireless.Such as, my audio doesn't work when I boot. I need to reload the ALSA driver using sudo /sbin/alsa force-reload
Is there something specific to the wireless that I can force-reload and it will start working w/o having me reboot my PC?
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Jan 1, 2010
How can i add a PPPOE connection witch connect automatically on system start up in text mode in centos 5.4
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Jun 7, 2009
I want to install CentOS from netinstall CD, but it doesn't work for wireless connection, because it just looks up for eth0 connection. Well, I connected server to wired USB connection and it's named eth1. I want to use netinstall CD but using eth1 connection. Is there any way for doing it?
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Dec 19, 2009
I'm using Fedora 12 with Apache 2.2.14, and I was having this error on 2.2.13 as well.
Even when I connect to my server over LAN, Firefox times out occasionally while connecting. I can't figure out what is causing this. The error_log isn't showing anything. I even cleaned the error_log file, so that if something happened, it'd be a little easier to spot. But I'm still getting time outs, and nothing in the error_log.
Here is my httpd.conf [URL]
It's the default Fedora configuration, I've only changed the ServerName if I remember correctly. it's not the Timeout setting, because on LAN it should never time out.
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Jan 24, 2011
When ever i run ssh -p <port> <user>@<remote IP>, i get a connection has timed out error. (i use the -p <port> part because i'm using a custom port). does anyone know what could be causing this? i know of a few *possible* problems, but i don't know how to test them all.
- I am on the same network as the server (I'm trying to test using remote IP to make sure it works before i go out an try it somewhere else)
-The router could be blocking it (i'm using linksys)
-IPtables may not be set up right (i think it is though. the only thing i've run is "sudo iptables -A INPUT -p tcp --dport ssh -j ACCEPT". I have changed the port for the server since then. maybe i have to restart it or something for it to recognise the change? I know very little about IPtables though).
-maybe i have to change something in my client or server config files? (the only config file i've changed is the sshd_config file on the seerver, and that was to change the port to my custom port).
thats all i can think of for now. It may be none of those. I do have the sshd_config and port forwarding in my router set to the same port, so thats good.
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Dec 20, 2009
I have an NFS4 and Kerberos server on the same machine running a CentOS Plus 5.4 kernel (due the Redhat NFS kernel bug). On shutdown the command to mountd produces a [FAILED] response and the NFS share refuses to unmount, complaining that it is busy. This occurs even if no client machines have been started. i.e. with all machines stopped, start the server only (no clients) then shutdown the server - produces the same result.
Immediately after the server has been started, query the nfs daemon:
# service nfs status
produces normal output, except for:
# rpc.mountd is stopped
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Dec 1, 2010
I would like to put a command to ring the system bell several times when a connection via PPP drops.
Where/how can this be done using bash?
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Aug 23, 2009
I have installed bind from the repos and am trying to setup a caching name server. After copying the stock name-cachinging.conf to named.conf, I tweaked named.conf to reflect my LAN:
options {
listen-on port 53 { 127.0.0.1; 192.168.1.102; };
listen-on-v6 port 53 { ::1; };
[code]...
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Apr 13, 2011
Seismicmike here. My first post. I'll try to be as clear and concise as possible. For the sake of this post, I'm going to use 1.2.3.4 as a place holder for my public IP. On my web server, I would like to be able to access the /var/ftp directory through a web browser. I have successfully done so with Google Chrome, but I cannot access the directory in Firefox or IE. Both FF and IE ask me for authentication but then time out attempting to load the directory.
I suspect that there may be something up with switching to passive mode and/or that this issue may be more with my configuration of Firefox and not with the server (seeing as how Chrome works). Another possibility may be related to SSL. When I connect with FileZilla, I have to use the FTP over Explicit SSL/TLS option in order to connect. In any case I still would like to fix it. I would also like to avoid having to install FireFTP if at all possible.
Steps to reproduce (not that you can without my actual IP =J):
* Open Chrome
* Go to ftp://1.2.3.4
* Enter username
* Enter password
[code]....
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Jul 31, 2011
Just re-installed Bodhi. Ran update, dist-update, set up connection and connection still slow or timing out and reporting errors in 'iwconfig'. This is 3rd re-install of this version. Have also tried 3.0 kernel and pae versions of Bodhi. Cannot get this connection up to speed and without errors. Atheros chipset ar9271.
Sorry for weird subject line and opening paragraph. Trying to make it easy to find and browse in case this gets solved and can help someone else. Not being a Linux guru, I can only hope to help others through my mistakes and ignorance.
I followed instructions to update driver listed at Linux Wireless.
In addition to following the directions at Linux Wireless, I also downloaded the GUI Program to install ath9k_htc.
No luck. My connection reports 1M/s and is reporting "invalid misc:" errors in iwconfig.
I'm running Midori browser but apt-get and wget are also downloading slowly.
I'm connecting to a Zyxel 660 series router using WPA/WPA2.
uname -r
Code:
Code:
Code:
Code:
sudo lshw:
Code:
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Jan 21, 2016
My systemd-udev-settle.service is failing for some reason.
systemctl status systemd-udev-settle.service -a output
Code: Select all● systemd-udev-settle.service - udev Wait for Complete Device Initialization
Loaded: loaded (/lib/systemd/system/systemd-udev-settle.service; static)
[ode]...
Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable.
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Jul 12, 2010
My 5.5 server has crashed on my multiple times over the past few weeks. I have 2 terabyte drives mirrored.It automatically reboots and seems to run fine after rebooting.I've attached a copy of the /var/log/message to this post.I was unable to paste file.I'm not if a bad disk is causing the problem or not.
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Nov 3, 2010
I have a compaq c784tu and it was shitty with xp. Vista is quite crap, so i turned over to ubuntu 10.4. The configuration of the laptop is: 1.73 GHz Intel Pentium Dual Core Processor T2370 with 1-MB L2 Cache, 533 MHz FSB featuring Intel Mobile 945GML Express Chipset Motherboard, 2-GB PC2-5300 DDR2 667 MHz SDRAM (Maximum 4-GB in 2 slots), a 160-GB SATA 5400 rpm Hard Disk Drive and 8x Super Multi Double Layer (8.5 GB) Slot-in DVD Writer.Everything worked like a charm and I was able to connect to the internet through a public wifi network. However, I came home this week to my mothers house, where they have a dsl-router to connect to the internet whih uses bridge mode pppoe. I tried to connect to the internet through it, and it initially couldnt. However, I got around that by doing a clean install of ubuntu. I was able to then connect to the internet using "sudo pppoeconf" and "sudo pon dsl-provider"One night the network manager app on the top left disappeared and would not come on. I figured I had fried my wifi adapter, however, lspci -v confirmed its presence.Further, "system>admn>system testing" detected the adapter aswell. I tried the iwconfig command in the terminal the result was:
lo no wireless extensions
eth0 no wireless extensions
wlan0 IEEE 802.11bg ESSIDff/any
[code].....
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Mar 19, 2009
I'm familiar with linux (Debian/Ubuntu), but new to CentOS. I recently installed CentOS 5.2 on a new server for my radio station. I can log in and do everything fine, save connect to any network. I only have a Broadcom wired nic. I know the wire and ethernet jack work fine, so that lead me to the server's settings. I'm not sure if I missed something somewhere, or a similar post (I'm sorry for double-posting if this has been done before).
There is a static IP address set, and that's done correctly.
From what I've seen, someone would like to see /sbin/lspci | grep -i ether: 03:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5722 Gigabit Ethernet PCI Express
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Jun 29, 2009
using a terminal on the server,telenet localhost 25 should connect to my mail server.It times out yet I can telnet remotely to my mailsever and get connected.I removed Iptables and that does change things.what ever is causing this started a week ago fri.I was adding to the iptables.I am still a newbie to Linux and Centos so I probably messed it up.
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Jul 22, 2009
how to setup a broadband connection in Centos5.. My broadband connection is over a PPPoE link
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Jul 28, 2010
I have just taken on a dedicated server sitting somewhere in Norfolk. I have created a website that uses PHP to connect to another remote server in order to interrogate a MSSQL database. This script, running on Apache, uses a VPN connection to connect to the remote server.To test, I have Apache on my laptop at home and just used Microsoft Network Connection to create the VPN connection.I have now uploaded this site to my new CentOS server and need to create the same VPN connection. I understand this is a command level and have been advised to use OpenVPN which I have successfully installed.My problem is I only have the details remote ip address, username and password. I believe I have to use the 'client.conf' script instead of server.conf.
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Sep 14, 2010
I have a email(postfix) installed on my centos, i think it is under some kind of attack, Is it possible that I can check who is connecting my server?
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