Mailinglist Archive: opensuse-security (421 mails)
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Re: [suse-security] Re: openssh-2.9p1-7: Protocol 1,2 or Protocol 2,1 ?
- From: Lutz Jaenicke <Lutz.Jaenicke@xxxxxxxxxxxxxxxxx>
- Date: Thu, 14 Jun 2001 17:41:17 +0200
- Message-id: <20010614174117.B7355@xxxxxxxxxxxxxxxxxxxxxx>
On Thu, Jun 14, 2001 at 04:50:31PM +0200, Richard Ems wrote:
> 1. Is the order in sshd relevant? Protocol 1,2 == Protocol 2,1 ?
>
> 2. Should I change to 2,1 on my firewall?
It's the client that decides which protocol to use (if both are available).
For sshd the order is not relevant. For the client the order is of
importance.
Protocol 2 should be preferred over protocol 1, so I have changed this
in ssh_config after installing the RPM. The handling of the sessions
is different for the protocols and protocol 2 has some problems with
connection shutdown when background processes were started. Maybe that's
the reason why SuSE decided to stay with protocol 1 as default.
Best regards,
Lutz
--
Lutz Jaenicke Lutz.Jaenicke@xxxxxxxxxxxxxxxxx
BTU Cottbus http://www.aet.TU-Cottbus.DE/personen/jaenicke/
Lehrstuhl Allgemeine Elektrotechnik Tel. +49 355 69-4129
Universitaetsplatz 3-4, D-03044 Cottbus Fax. +49 355 69-4153
> 1. Is the order in sshd relevant? Protocol 1,2 == Protocol 2,1 ?
>
> 2. Should I change to 2,1 on my firewall?
It's the client that decides which protocol to use (if both are available).
For sshd the order is not relevant. For the client the order is of
importance.
Protocol 2 should be preferred over protocol 1, so I have changed this
in ssh_config after installing the RPM. The handling of the sessions
is different for the protocols and protocol 2 has some problems with
connection shutdown when background processes were started. Maybe that's
the reason why SuSE decided to stay with protocol 1 as default.
Best regards,
Lutz
--
Lutz Jaenicke Lutz.Jaenicke@xxxxxxxxxxxxxxxxx
BTU Cottbus http://www.aet.TU-Cottbus.DE/personen/jaenicke/
Lehrstuhl Allgemeine Elektrotechnik Tel. +49 355 69-4129
Universitaetsplatz 3-4, D-03044 Cottbus Fax. +49 355 69-4153
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