topic Re: ssh question in Operating System - HP-UX

ssh question

John McDen — Thu, 11 Apr 2002 11:52:06 GMT

Hello Gurus,

I installed ssh 3.1p1 on ver 11.0 but how do I replace telnet with ssh?

What do I need to do ?

How do I make my users use ssh and sft instead of telnet and ftp?

Thanks in advance, and points will be assigned to every answer.

Re: ssh question

Emiel van Grinsven — Thu, 11 Apr 2002 12:08:15 GMT

Hi,

A few things to note for compiling SSH on HP-UX 11.00. To ensure that the make compilation works, you have to add a parameter to ./configure as follows:

# ./configure --host=hppa2.0-hp-hpux11.00

For running sftp on Unix, also make sure that /usr/local/bin is in your PATH variable so that it knows where to search for the other required SSH binaries.

It doesn't answer all your questions but it can help.

grt, Emiel

Re: ssh question

Clemens van Everdingen — Thu, 11 Apr 2002 12:09:45 GMT

Hi,

Find some links here :

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x8464c5ea0230d411ade80090279cd0f9,00.html

Clemens

Re: ssh question

Kurt Beyers. — Thu, 11 Apr 2002 12:13:25 GMT

If you have ssh on your HP-UX box, you must make sure you have a ssh client on the workstations as well.

You can disable access bu telnet and ftp by editing /etc/inetd.conf and put the entries for telnet and ftp in comment:

ftp stream tcp nowait root /usr/lbin/ftpd ftpd -l
telnet stream tcp nowait root /usr/lbin/telnetd telnetd

Now restart the inetdaemon:

/sbin/init.d/inetd stop
/sbin/init.d/inetd start

The users are now forced to use the ssh connection instead of telnet.

Kurt

Re: ssh question

Darrell Allen — Thu, 11 Apr 2002 12:31:08 GMT

Hi John,

First verify ssh, sftp, and scp work for you then your users. Note that the client machines will have to have an ssh package.

Once your users have ssh working, disable telnet and ftp in /etc/inetd.conf and tell inetd to re-read it's configuration with "inetd -c".

Also, if you are "replacing" telnet for security reasons, you should also replace rlogin. It too is disabled in /etc/inetd.conf.

Darrell

Re: ssh question

Dylan Fahey — Thu, 11 Apr 2002 12:31:11 GMT

Hi,
Although some people will be able to answer your question specifically, you might try http://www.onsight.com/faq/ssh/ssh-faq.html , http://www.openssh.com/ for the FAQ and http://www.snailbook.com/ for "SSH: The Secure Shell The Definitive Guide", http://wks.uts.ohio-state.edu/sysadm_course/html/sysadm-558.html ,
http://wks.uts.ohio-state.edu/sysadm_course/html/sysadm-1.html#HEADING1-37 .

Re: ssh question

Sridhar Bhaskarla — Thu, 11 Apr 2002 12:49:15 GMT

Hi John,

1. Broadcast to your users that telnet/rlogin will be disabled by keeping a message in motd or /etc/issue. Give them sufficient time.

2. Do not disable telnet at once. Instead use /var/adm/inetd.sec file to restrict telnet/login/shell and rexec to only few systems preferably to your system from where you should be able to login. This will not allow users to telnet. You can use "telnet deny all" followed by few clients.

3. Let users start using ssh and be comfortable with key management etc., If you get into any problems with ssh, you can always telnet to the box from your system.

4. Keep startup/shutdown scripts so that sshd will comeup automatically when you reboot the system.

5. Disable the abovesaid services from inetd.conf once you feel comfortable with it.

-Sri