CentOS 5 Server :: Ssh Connection - Was Working - After Update - Stopped
Oct 1, 2010
I have openssh running it was working last week then an update was done and now ssh does not work. removed the updates and the problem still exists.
Its CentOS 5.5 with all the latest updates for 64 bit!
Issue if as follows:
Connect locally to the loop back ip or remote ip the connection is disconnect right after the correct password is entered.
Here are copies of the log, sshd config.
sshd config:
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Jul 23, 2009
After using fedora 11 for a month or two now the ethernet gave out on me tonight. However if I switch to my ubuntu or windows XP install it runs fine. I made no recent changes to network connections, and no installed programs that should effect it.
kernel version: 2.6.29.6-213.fc11
default connection: eth0(and only connection)
ifcfg-eth0:
# Networking Interface
DEVICE=eth0
BOOTPROTO=dhcp
HWADDR=00:1F:C6:DB:05:0C
ONBOOT=yes
TYPE=Ethernet
IPV6INIT=no
USERCTL=no
NM_CONTROLLED=yes
NAME=eth0
UUID=5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03
DNS1=192.168.1.254
PEERDNS=yes
PEERROUTES=yes
I have tried, restarting, older kernel, restarting services, and clearing the DNS Cache. The specific error I get is that "Firefox can't find the server", and most other applications return similar. I can however ping websites still. All other computers on the network are running fine, and booting into another system the internet will work. Just not for fedora.
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Apr 2, 2010
I have been using my laptop as a development machine for a few months now, developing php/mysql applications, and testing them offline via the same laptop by pointing the browser to url.
But a few days ago, my url stopped working and I discovered that it will now only work if I have an active internet connection plugged in. Why has this happened and how to I fix my test server so localhost works with or without an internet connection via an ethernet cable.
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Feb 22, 2011
I have a machine running with slackware64 13.1 and vnc servers is installed on it. It worked for months until yesterday, when I couldnt connect to the machine remotely.
I have 2 vnc "users" on this machine, root and "user". Each have their own desktop. Root has desktop :1 and user had desktop :2. Simple enough.
VNC servers is started via /etc/rc.d/rc.local with the command:
Code:
Code:
It worked flawlessly. I use the very same configuration on my home server, never had a glitch.
From the "distant" machine, I get this error when I try to connect:
Code:
Unable to connect to VNC server
What has changed so it no longer works? I assume its not a network problem since the machines are all located in my home network and there is no firewall or router in between them.
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Jan 21, 2011
My mail server stopped working this weekend, when I got in today I restarted and all the emails came through. The panic_log shows: daemon: accept process fork failed: Cannot allocate memory several times over the course of a few minutes. Can anyone give me advice on troubleshooting this one?
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Feb 4, 2010
When using yum update, can a program have been wrongly updated (or marked updated without finishing the update)? I ask this question because I'm new to Linux and my connection stopped during a yum update and the console text was strange when I did CTRL + C. (Did it 2 times (starting the yum update and because of no more answers and pressed CTRL + C)).
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Apr 9, 2011
I've been administrating a dedicated Linux CentOS 5 (Linux 2.6.26.5-rootserver-20080917a) server for around 2 years, and although not a network or Linux expert, been learning to configure as need arises. Primarily using Plesk for day-to-day, but occasionally using Putty to SSH into server.
For all the time I've had the server, I've been connecting to my server via sFTP using "root" password. ( Although, I know this is really bad practice, I assume made safer by connecting with SSH FTP)
After spending another normal day in the office developing websites, connecting to my server as root using SFTP in Filezilla AND Dreamweaver I left for the night.
Returned next morning, after having done no manual updates or amends to my server; I could no longer SFTP into my server?
Thought it may be related to my office network, so tried it from home over the weekend, same result; can no longer connect SFTP for root?
I can connect to the server via Putty using my "root" username and password.
After spending hours looking on the internet for a solution, I'm lost for ideas as I didn't make any changes?
What happens when I open my Filezilla and try connecting as SFTP is it states:
Error:Connection timed out
Error:Could not connect to server
I checked server log /var/log/secure and it states:
Accepted password for root from UNKNOWN port 49212 ssh2
Apr 9 07:41:41 s15320264 sshd[7122]: fatal: Write failed: Connection reset by peer
Odd part is, it's worked fine for weeks, months without ever failing to connect?
Also, notice that Putty connection seems to take much longer to authenticate root user than it used to?
Checked via Plesk Health Monitoring and all CPU, Memory and Disk Levels are well below any alarm levels.
I have run all Plesk updates to 10.2.0 in the hope that it resolved it, but to no avail.
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Nov 24, 2009
I have Debian installed a year ago, working perfectly until last week when network card connected to internet stopped to communicate. I did no change in configuration. It just stopped to work while I was reading an online web page. Network card connected to local network still works fine.
I thought it might be a NIC failure so I installed a new PCI NIC but no change, still no communication throught this NIC.
I verified/changed cable between NIC and the router, no luck. If I connect the same cable from router to a Windows PC, everything is OK. If I connect back to Debian machine, it does not work.
I tried connect this NIC with a different router with DHCP enabled, nothing, NIC will not communicate with DHCP server.
I tried to set static IP, no change.
Today I booted a Knoppix 6.2 and this NIC worked perfetly! It set up using DHCP, I could access the internet.
I booted machine as usual and the problem still persists of course.
This is information captured immediately after boot. The trouble NIC is eth0 after boot finishes.
All this was captured with eth0 connect to a router with DHCP enabled. There is no DHCP entry in syslog related to eth0. Reinstall is the very last option.
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Oct 6, 2010
I managed to set up a PPTP VPN connection in Ubuntu 10.04, and it worked first time.This was about 3 months ago. It was working yesterday (Oct 05 2010), but when I came to log in to the VPN today it doesn't work. I tried the same VPN connection on my wife's laptop which runs Vista and it works. I have tried re-entering the details, even deleting and setting up from scratch via network manager. And yes I have the correct VPN plugins. what I should do. Is there a log file so I can have a look at it to see what the problem is. If there is where is it located. The computer is able to connect to the internet without any problems, just can't connect to the VPN. The only thing I can think of is that the update manager popped up this morning so a few things have got updated today. maybe something in there broke the VPN connection.
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Oct 20, 2010
About a week ago I upgraded to Maverick from Lucid.
All networking worked fine on Lucid.
I am using an Acer Laptop with the Atheros AR928X Wireless Network Adapter.
I can connect to my home network (visible, with WPA2-Personal) fine. However, I cannot connect to my university's wireless network. The only difference I noticed is that its network is using WPA2 Entreprise with Tunneled TLS Authentication and MSCHAPv2.
I tried dmesg and I got:
wlan0: authenticate with 00:1a:1e:ef:f4:e1 (try 1)
wlan0: authenticated
wlan0: associate with 00:1a:1e:ef:f4:e1 (try 1)
wlan0: RX AssocResp frin 00:1a:1e:ef:f4:e1 (capab=0x431 status=0 aid=2)
[Code].....
Unless the driver has changed, I suspect this is not a driver issue, since it worked fine on Lucid. Is this a NetworkManager issue?
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Mar 20, 2011
I'm running 10.10 on a brand new computer, and up until this afternoon the wired connection was working fine. All of a sudden it stopped working (and doesn't work in Windows either).I ran sudo dhclient and it gave me:
DHCPDISCOVER on eht- to 255.255.255.255 port 67 interval 3 (7, 9, 10, 18, 13)
No DHCPOFFERS RECEIVED
No working leases in persistent database sleeping
[code]...
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Feb 6, 2010
My ubuntu karma desktop is plugged into a wired connection that goes through a router and into my cable modem.Everything was working fine like it had been foseveral months yesterday morningSomething happened by the end of the day that has screwed up my wired networking. I plugged my laptop into the same cable thats plugged into my ubuntu, and the cat5 cable is live. Also when I plug said cable into the ubuntu box, the ethernet lights come on, or atleast a solid green one. Meanwhile the network connections Icon continues to have a red X and a tooltip saying "No network connection".
Under network settings, there is only one wired network "Auto eth0", but it says "last used: never" which is strange since I've been using this for months. When I click edit the main settings are MTU automatic, ipv4 automatic DHCP, and ipv6 ignore.hat could the problem be? By chance did a karma update get released that broke the networking
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Jul 4, 2010
I installed Ubuntu 10.4 side by side with my Vista. This is on a PC I leave on permanently and use as a sort of Sever, so Security and Network connection are VERY important on this device. I use it for documents and IP PBX (telephone system). I currently use Vista and 3CX, but I plan to roll it over to Unbuntu full time once its up and runnng correctly - I will just need to change the Grub2 conf priority. After install, all was fine and I managed to make many changes to settings, apps and updates, but I have noticed in the past week when going in to make further changes the network has suddenly stopped working! According to Network Manager and the icon on the panel it is connected and I can not see anything obvious that is not correct. I tried doing a PING (192.168.1.1) from Network Manager to the main router, but it failed. I know that there is nothing wrong with the network nor the card or PC it all sits on. It's working now with Vista and my other machines. It must be a config some-where.
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Sep 17, 2009
i did an update yesterday and after me-tv doesn't work any more, now when i run me-tv i get this error message,Duplicate object id 'hbox1' on line 1220 (previously on line 535)To c if the tunner was working i installed kaffeine and it works fine, so its something related to the me-tv, any ideas how to fix it
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Jul 22, 2010
I'm using fedora 13, and it's been a while that yum auto-update doesn't pop up.Some time ago, when updates were available, a notification popped up asking for update (and I love this feature because I didn't have to check manually).Under System>Preferences>Software Update i've Daily check for updates and weekly check for major updates, with no automatic installs.And doing System>Administration>Software updates, it load and updates correctly, just it's no longer automatically checked.
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Apr 18, 2010
Is it just me or your update applet also stopped working recently? I'm running Factory KDE-4.4.2 and openSUSE-11.2. It's always "Checking for updates..." without finding any, even though I can always see new ones through Yast - Online Update. And sometimes it asks me to accept some key, when I click OK it asks me for a root password but after I type in half of the password it simply disappears and starts "Checking for updates..." again without end.
And YAST doesn't show any newer packages anymore but rather has "Switch system packages" on the top. If I click on that, then it starts showing newer packages and wants to update them all. But what if I want to use Packman's packages for multimedia and Factory KDE for KDE? If I select "Switch system packages" for KDE then it will update, for example, Kaffeine to KDE's but I want to keep it Packman's. If I search for Kaffeine, it shows no newer packages, but if I go to Versions, there's clearly a newer version there!
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Mar 19, 2010
Today i made an update using Webmin, and after that php stopped working, instead of running the files it launches a download. So i checked what was going on, and php module was disabled in apache config. When trying to enable it, it said the file "/usr/lib/apache2/modules/libphp5.so" did not exist, and indeed it disapeared. I tried to reinstal php and apache (with and without --purge, through apt) and it didn't solved the problem.
Also i tried copying the file from another machine, also without success (this time it shows " Apache is running a threaded MPM, but your PHP Module is not compiled to be threadsafe. You need to recompile PHP.") Dont know what to do now, im kinda desperated here because this machine hosts my website =P
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Aug 9, 2010
Basically what seems to have happened is after the recent Ubuntu update my Windows partition became unbootable (or maybe just removed from Grub). This wasn't a problem for a while though as I still had access to my files through Ubuntu.After a couple of weeks of using Ubuntu I needed to get into Windows, trying to (blindly) fix the problem I think what I did was open up Disk Manager in Ubuntu, clicked the Vista partition and marked it as bootable. Having done this some sort of error occured (can't remember what exactly) and after a reboot the partition is no longer accessible via Ubuntu.
I've read through a fair amount of similar posts and tried anumber of solutions but haven't had any luck so I thought someone here might be able to shed a bit more light on to my situation?Realistically, my main concern is getting data off the drive, if I can do that I can wipe the entire thing clean
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Nov 10, 2010
Touchpad has stopped working after some update. How to re-enable it? I don't haveusb mouse. No PS2 port. pci=noacpi dop. apt-get install xserver-xorg-input-synaptics
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Apr 30, 2011
On 10.10 my wireless card worked out of the box. Now on 11.04 it stopped working after the update!. My card is Atheros AR5001.
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Jul 22, 2011
I kind of feel like I'm out there hanging by myself when trying to understand Ubuntu. If there is a tutorial or guide for beginners, please feel free to post the link to it!I recently updated Ubuntu 11.04 on my dads computer and after the restart I noticed his keyboard no longer works. Well, it's has the light on like normally, but it's like the computer doesn't recognize it.
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Apr 8, 2010
I have ubuntu 9.10 and my wireless connection has been working perfectly until a few weeks ago when I updated my laptop. I can connect to the internet using my wired cable but not by wireless. There is nothing listed under my wireless list. I am new to this and have been unsuccessful in getting my wireless connection going again. I don't even know were to begin. I have a 2wire modem also.
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Nov 29, 2010
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Mar 7, 2010
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Mar 22, 2010
I did an update yesterday and since then my mouse stopped working.
/var/log/messages contains:
Code:
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Mar 25, 2010
Running openSUSE 11.2 with HP All-in-one 3055 printer/fax/scanner attached through network.
Using hplip package.
Printer works just fine. Scanner did work for quite some time, however it stopped working after some update about a month ago (using only opensuse update repo).
When doing hp-scan I get following error:
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Sep 1, 2011
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Mar 26, 2010
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Jul 3, 2010
I've been running ubuntu on my Asus 1001ha netbook for half a year or so. I ran Karmic for at while, wifi working and all, accepted the recommended updates when Update Manager popped up and everything was fine until one day I let Update Manager do it's thing and my wifi stopped working.. Lycid had just come out that same week, so I thought "screw it" and installed 10.04 instead..
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Sep 21, 2010
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