[Bug 1307] client disconnects if ServerAlive enabled but not implemented
bugzilla-daemon at mindrot.org
bugzilla-daemon at mindrot.org
Tue Apr 17 12:32:54 EST 2007
http://bugzilla.mindrot.org/show_bug.cgi?id=1307
Summary: client disconnects if ServerAlive enabled but not
implemented
Product: Portable OpenSSH
Version: 4.3p2
Platform: Other
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: ssh
AssignedTo: bitbucket at mindrot.org
ReportedBy: dave.barr at gmail.com
I'm using OpenSSH v4.3p2 against a NetApp filer. It does NOT implement
ServerAlive*, and correctly returns SSH2_MSG_UNIMPLEMENTED if sent a
ServerAlive packet (as seen with ssh -v).
ssh unfortunately however still disconnects the client after sending
ServerAliveCountMax unanswered packets even though the server correctly
told the client that it is not implemented.
ssh should either disable ServerAlive* when the server says it is not
implemented, or perhaps treat SSH2_MSG_UNIMPLEMENTED packets as a valid
ServerAlive ack. (My vote is the former).
(Who is also submitting an RFE to get ServerAlive implemented in
NetApp's sshd, but isn't holding his breath).
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