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Old   September 27, 2005, 10:53
Default SSH Instead of RSH
  #1
Akano
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My cluster was running rsh on Linux Redhat 7.3 up to CFX-5.7, Now I have to run Ansy CFX10, Which will be on Suse 9.3, how can I switch the rsh to ssh ?
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Old   September 27, 2005, 11:10
Default Re: SSH Instead of RSH
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Mikhail
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It is not good idea, because ssh uses encryption which slow down cluster run. Furthermore rsh still present in SuSE9.3

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Old   September 27, 2005, 11:51
Default Re: SSH Instead of RSH
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Stevie Wonder
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Hi Mikhail,


Could you expand on this please? Where did you see such information?

However, if security is not an issue, RSH is the right choice.

S.W.
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Old   September 27, 2005, 12:00
Default Re: SSH Instead of RSH
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Stevie Wonder
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Use the following environemnt variable in all your nodes (bash syntax): export CFX5RSH=ssh

You'll should also want the ssh connections passwordless but this will require you extra steps. Otherwise it'll be annoying to type the password every time you launch a solver in each node.

Although not present by default in the 9.3 installation you can use the rsh rpm from the SuSE 8.2 version (if you still find it somewhere).

Good luck, S. W.
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Old   September 27, 2005, 12:47
Default Re: SSH Instead of RSH
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Mikhail
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"OpenSSH encrypts all traffic (including passwords) to effectively eliminate eavesdropping, connection hijacking, and other network-level attacks. Additionally, OpenSSH provides a myriad of secure tunneling capabilities, as well as a variety of authentication methods." www.openssh.org

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Old   September 27, 2005, 12:47
Default Re: SSH Instead of RSH
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Mikhail
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RSH client: ftp://ftp.suse.com/pub/suse/i386/9.3...7-556.i586.rpm RSH server: ftp://ftp.suse.com/pub/suse/i386/9.3...7-556.i586.rpm

RPM's should present in CD distribution
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