ssh and using putty from the client

ashley75 · 09-09-2003, 03:00 PM

I am trying to connect the server Redhat Advance server 2.1, using putty program and I have some problems. I was able to telnet to this server but I understand it's not safe so I am trying to ssh.

From the server, I was able to do:
#ssh oracle@machine_name

and it connected. when I do that from the client I can't.

could someone please give me some instruction of how to do this????

thanks,

Mara · 09-09-2003, 05:42 PM

Check your firewall. Probably you're blocking ssh.

ashley75 · 09-10-2003, 08:46 AM

I don't think firewall is a problem b/c I reside internally another word, I am on the same side as the server locate. it's not like I am from outside. plus telnet is owrking fine for me.

any thought???

tefal · 09-10-2003, 10:46 AM

How about the firewall settings on the server - is the incoming port blocked?

Mara · 09-10-2003, 01:57 PM

From the client, run something like
telnet serverIP ssh
(it connects to the ssh port using telnet, so you can see all messages). Check what happens.

ashley75 · 09-11-2003, 09:40 AM

when I say:

telnet ServerIP 23

it works fine

but when I say:
telnet ServerIP 22

and I got the error:

Connecting To 172.23.1.8...Could not open a connection to host on port 22 : Connection failed

I believe ssh using port 22 and seem likes port 22 is unvailable, how to get this work???

thanks

trickykid · 09-11-2003, 09:53 AM

Is ssh even running?

ps -aux | grep sshd

And when they mean firewall, make sure a firewall on this server is not blocking port 22, not if its behind another firewall, etc.

ashley75 · 09-11-2003, 09:57 AM

it's running

root 903 0.0 0.0 2676 1280 ? S Sep10 0:00 /usr/sbin/sshd
oracle 7399 0.0 0.0 1752 616 pts/7 S 09:55 0:00 grep sshd

how can I check to see if the firewall on this server is blocking the port 22?????

what about FTP, could you please show me how to check for FTP as well???

thanks

trickykid · 09-11-2003, 10:10 AM

I'm never used the Advanced Server but you can try to type: setup at a console to bring up a configuration window to setup different services, etc. Should be able to select from there to allow FTP and SSH and reconfigure your default firewall settings if that was setup during installation.

ashley75 · 09-11-2003, 10:23 AM

thanks for your prompt advises.

I did type setup and go to services, I noticed that ftp services is not there so how can I reinstall the ftp package on this server???/

Crashed_Again · 09-11-2003, 10:52 AM

It depends on what ftp package you want to use. If you have the RedHat cds you can run:

redhat-config-packages

and then choose to install whatever ftp package you want from there. Then you will be prompted to insert the redhat cd.

trickykid · 09-11-2003, 10:53 AM

Quote:

Originally posted by ashley75
thanks for your prompt advises.

I did type setup and go to services, I noticed that ftp services is not there so how can I reinstall the ftp package on this server???/

You can either most likley install the FTP packages provided by Redhat from your CD's you installed with or you can download whatever FTP service you intend to use. If your looking for the most popular with best track record, I'd recommend proftpd at www.proftpd.org or if you want it secure, go with something like sftp.

Regards.

Mara · 09-11-2003, 01:21 PM

Quote:

Originally posted by ashley75

how can I check to see if the firewall on this server is blocking the port 22?????

iptables -L
Then search for a line with '22'. But it may be SSHD configuration. Look into /etc/sshd/sshd_config (or a similar file), browse the configuration, maybe it's allowing only certain IPs.