General :: Cannot Ssh Into RHEL 5.5 Server Unless SSHD Server Debug Is Enabled?
Aug 11, 2010
I cannot ssh into an RHEL 5.5 server (192.168.20.104) from another RHEL 5.5 server (192.168.20.101) unless server debug is turned on 192.168.20.104, and even then, I have to wait several minutes before the connection is established. scp to and from the 104 server is also not working.Here is the debug output on the 101 server when server debug is not enabled on the 104 server-:
I have multiple public ip addresses.My DSL modem blocks ping from a server behind the modem (nb6+4w) modem lan ip (gateway) is xxx.xxx.xxx.105the server is xxx.xxx.xxx.107If I DMZ this server it responds to pings.If i don't want to use DMZ, what service is ping using.I have set up virtual server 443 to this 107 ip as it's a SSL server
I have a script that works fine on a commercial server and my CentOs Box at home but doeasn't work with another commercial server (Where we need it to).I have pulled the PHPINFO.PHP from both and wondering if someone could tell me which parameters to compare when the following happens:The script seems to do the HTML/Java and outputs the PHP script on the page , but this site has many other PHP scripts working fine:
i have dual OS in my hard disk. win xp and rhel5. i used use ntfs partition too while working in linux. There is no problem until i enable selinux. When i enabled that, its giving some error at startup and left the partition unmounted. But manually i can mount after logged in. But i need it at the startup itself. How to solve this.i am installed dkms* dkms-fuse* fuse* and fuse-ntfs-3g* rpms to use the ntfs partitions.
I am looking for the active CPU in my dell server whichl has 64 cpu's, can anyone explain me how to list the cpu which are currently active and cpu's not active, also appriciated if you could help in clarifying how to enable a cpu or disable cpu in the RHEL 5.5 environment
I've got Fedora 14 running on an EBS volume on Amazon EC2. I've created a few users and enabled port 22. When I set a password for these users, they can successfully ssh into the instance; even if they logout and login again....until:
If I reboot the machine, they can no longer ssh into the machine (permission denied). If I issue the passwd <user> command and change their passwords, they can login again....until I reboot the machine at which time they cannot login again until I change their passwords. The problem exists even from the machine. That is, if root attempts to ssh into 127.0.0.1 using their username/password, the same problem/resolution exists.
is possible to edited the default RHEL CD to have it automatically install RHEL based off of a kickstart file that I will store locally on the CD. My plan would be to put a cd in a server and have the OS automatically being installed.
We are planning to migrate our LINUX server from RHEL 3to RHEL 5. What are the configuration difference between RHEL 3 to RHEL 5 for webserver installations?
I have a Redhat fedora core release 6 (2.6.22.9-61.Ns4) server and form time to time ssh fails although I am still able to ping the device and with a reboot the device will start working correctly so upon further investigation it appears the sshd daemon fails.Not knowing a great deal about Linux I thought I would ask some advice on the path I am thinking of taking. The first would be to put an entry in the cron to try and start the ssdh every hour or so. Would this cause issues in the long term run it multiple times when the sshd daemon was still running?
The Second though I had was having a bash script to check if the process was running and if not restarts it and if it was just exit the program which would seem like a neater way to do it but this is where my limited Linux knowledge hits a wall so was looking for suggestion on how to implement this?
I am getting these error in RHEL 5.3 while i did "yum update".
---> Package libstdc++-devel.i386 0:4.1.2-46.el5_4.2 set to be updated ---> Package libstdc++-devel.x86_64 0:4.1.2-46.el5_4.2 set to be updated ---> Package libstdc++44-devel.i386 0:4.4.0-6.el5 set to be updated
[code]....
The program package-cleanup is found in the yum-utils package.
Having some issues setting up sendmail on a (basically) blank RHEL 5.5 server setup. My ultimate goal is to be able to automagically send logs / errors / notifications to ourselves from the server.
Our basic setup is a Win 2003 domain with exchange running on mail.domain.com.au.
I've edited the '/etc/mail/sendmail.mc' and added the :
Code:
line to it.
Also added the domain (domain.com.au) to the '/etc/mail/local-host-names' files
Also edited submit.mc and added
Code:
When I try and send a mail from root or a test user to one of the domain accounts, it seems to go fine, i.e no errors are reported but it never gets delivered.
From the mail logs:
Code:
So it seems to be sent to the queue no problems and when I check the queue :
Code:
Total requests: 0
Not nothing ever gets received. Am I missing something? I have read and read and read but dont seem to be getting any furthur.
So in the end this server doesn't need to do anything except be able to send mail from root to an external mail address.
In oreder to run an application software on RHEL 3 ES server, I created a link forcefully using following command from root id: # cd /lib64/tls/ # ln -sf libc-2.3.4.so libc.so.6 before that I copied file libc-2.3.4.so from a workstation with OS RHEL 4 WS so that a link can be created. Now I am unable to run any command except cd & pwd and it gives error messaage as given below: ls:relocation error:/lib64/tls/libc.so.6:symbol _rtld_global_ro,version GLIBC_PRIVATE not defined in file ld-linux-x86-64.so.2with link time reference.
Before running this command libc.so.6 was pointing to libc-2.3.so file in path /lib64/libc-2.3.2.so. I am now unable even to open a new window on the server.Please send me some solution as early as possible because this server is running production data and many users are runnig application on this server.
we are running a Red Hat Enterprise Linux ES release 3 (Taroon Upd 5) Kernel 2.4.21-32.ELsmp since several years. The server hosts an old ERP system who will be replaced at the end of the year.However it is necessary that some collegues are able to write some files to that server regulary. Since we are running Windows 7 on several machines, those users aren't anymore able to write to the samba share. Getting files from the share works fine.
But the problem seems not to be situated at the samba service because also the transfer using SSH (WINSCP) from any Win7 system to the server doesn't work.During testing we recogniced that transfering files smaller then 1kb works fine ... any file greater then 1kb ends up in an connection abort. This works with samba and also using SSH.All the workarounds editing some registry entries in Win7 for improving the interoperability between vista / win7 and samba don't work for us ... and also seem not to be the source of the problem.Is there a general known incompatibility between our RHEL version / kernel and Windows 7 regarding file transfers?
I want to make sure sshd service will start after a server reboot. On redhat or centOS I can do "chkconfig sshd on". What's the equivalent command for ubuntu?
Does anyone have an UP TO DATE document, or know how to set up a standard RHEL 4.1.2... 64-bit box to be a YUM Proxy machine? I have found several manuals, all being dated a while ago.
I have been tasked with taking over the new RHEL 5.6 server our company installed. Currently we have a network printer, for general purposes let's say it's called printer1 with ip address of 1.2.3.4.I want to add this printer to the RHEL server, do I simply run:lpadmin -p printer1 1.2.3.4
I have a RHEL 5 server with 32 bit architechture that is not recognizing more that 4 GB of RAM and I am trying to locate a version of the kernel-PAE package that will work well with the 2.6.18-53 kernel. I found something on Open VZ called ovzkernel-PAE that is built for the 2.6.18-53 kernel [URL]
and wanted to find out if there were any known issues with this release before I attempted to install it. Is anyone aware of any issues with any rpms on openvz.org or with this particular rpm in general?
I have a RedHat box that I have configured, security, audit rules, latest updates, etc. I want to be able to "image" that configuration so I can kick other boxes with that "image", that way no other configuration/updating needs to be done on the newly kicked boxes. What is the best way to accomplish this? To make things more difficult, it would be near to impossible for me to pull any software off the internet for this.
I have problem with sshd server, its authenticate user and then terminate the session. Here is debug log: Jan 1 04:26:41 server sshd[29677]: debug1: userauth-request for user root service ssh-connection method none Jan 1 04:26:41 server sshd[29677]: debug1: attempt 0 failures 0 Jan 1 04:26:43 server sshd[29677]: debug1: userauth-request for user root service ssh-connection method password Jan 1 04:26:43 server sshd[29677]: debug1: attempt 1 failures 0 Jan 1 04:26:43 server sshd[29676]: Accepted password for root from xx.xx.xx.xxx port 50971 ssh2 Jan 1 04:26:43 server sshd[29676]: debug1: monitor_child_preauth: root has been authenticated by privileged process .....
Last night a RHEL server in our cluster unexpectedly ran out of memory and became unable to perform its purpose. I say unexpectedly, because it had been purring away for ~385 days of uptime without a twitch. It has 16GB of memory, of which on average 2GB are in use. I see no unusual traffic in e.g. HTTPD log files. how to approach tracking down why this might have happened, with a view to preventing a reoccurrence.
provide me the steps for configuring the DNS server on RHEL 5.2.I did the DNS configuration on RHEL 4.7 it worked fine but as i see in RHEL 5.2 the named.conf file is different and i am confused.
machine ipaddress = 192.168.0.1 Domain name = testing.com
please provide me with the steps on how to edit the named.conf file and zone entries.
I have a database server running RHEL 5.1 32 bit that suffered some catastrophic failures about 6 months ago. We were able to patch it back together and keep it running, but now the manufacturing site it supports is going to shut down for two weeks and I would like to replace it permenantly. Does anyone have any guidance for that sort of thing? I'd like to have the new server up and running before hand, basically changing the hostname/ip and restoring the databases only on conversion day. I've done this in the past with HP UX - Red Hat conversions, but this is my first red hat to red hat move. Any advice or shortcuts?I forgot to add the other wrinkle. The new server will be running 64bit linux.
