bugzilla-daemon at bugzilla.mindrot.org
2011-Apr-07 11:16 UTC
[Bug 1887] New: Failure to initiate 12+ simulateous connections using priv-key auth
https://bugzilla.mindrot.org/show_bug.cgi?id=1887
Summary: Failure to initiate 12+ simulateous connections using
priv-key auth
Product: Portable OpenSSH
Version: 5.5p1
Platform: All
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: ssh
AssignedTo: unassigned-bugs at mindrot.org
ReportedBy: ddick at iinet.net.au
Created attachment 2026
--> https://bugzilla.mindrot.org/attachment.cgi?id=2026
Bourne Shell Script to reproduce issue
When rapidly starting a lot of ssh connections to remote hosts, the
most that can be done is about 12 without running into odd error
messages. When running in verbose mode the log shows;
OpenSSH_5.5p1, OpenSSL 1.0.0d-fips 8 Feb 2011
debug1: Reading configuration data /home/dave/.ssh/config^M
debug1: Reading configuration data /etc/ssh/ssh_config^M
debug1: Applying options for *^M
debug2: ssh_connect: needpriv 0^M
debug1: Connecting to localhost [127.0.0.1] port 22.^M
debug1: Connection established.^M
debug2: key_type_from_name: unknown key type '-----BEGIN'^M
debug2: key_type_from_name: unknown key type 'Proc-Type:'^M
debug2: key_type_from_name: unknown key type 'DEK-Info:'^M
debug2: key_type_from_name: unknown key type '-----END'^M
debug1: identity file /home/dave/.ssh/id_rsa type 1^M
debug1: identity file /home/dave/.ssh/id_rsa-cert type -1^M
debug1: identity file /home/dave/.ssh/id_dsa type -1^M
debug1: identity file /home/dave/.ssh/id_dsa-cert type -1^M
ssh_exchange_identification: Connection closed by remote host
so the tcp connection seemingly gets made and then killed shortly
afterwards. Both the client log and the server log indicate that the
other side closed the connection. There is an example script attached
to replicate the issue, it expects that a private key will be available
via an agent.
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bugzilla-daemon at bugzilla.mindrot.org
2011-Apr-08 05:57 UTC
[Bug 1887] Failure to initiate 12+ simulateous connections using priv-key auth
https://bugzilla.mindrot.org/show_bug.cgi?id=1887
Damien Miller <djm at mindrot.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |djm at mindrot.org
Status|NEW |RESOLVED
Resolution| |INVALID
--- Comment #1 from Damien Miller <djm at mindrot.org> 2011-04-08 15:57:49
EST ---
You are almost certainly running into sshd's MaxStartups limit. Have a
look at the documentation on this option in the sshd_config man page
and adjust the limit in sshd_config to suit.
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bugzilla-daemon at bugzilla.mindrot.org
2011-Sep-06 05:32 UTC
[Bug 1887] Failure to initiate 12+ simulateous connections using priv-key auth
https://bugzilla.mindrot.org/show_bug.cgi?id=1887
Damien Miller <djm at mindrot.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |CLOSED
--- Comment #2 from Damien Miller <djm at mindrot.org> 2011-09-06 15:32:53
EST ---
close resolved bugs now that openssh-5.9 has been released
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