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otro
2007 Aug 29
0
reverse mapping check; authentication methods
Hello all,
My logs get filled with bogus SSH connection attemps which I'd expect
should have been denied without logging, so a couple of observations.
Syslog has lots of entries like:
Aug 29 02:23:31 otso sshd[21000]: reverse mapping checking getaddrinfo for
powered.by.e-leven.be [78.110.207.104] failed - POSSIBLE BREAK-IN ATTEMPT!
Aug 29 02:23:31 otso sshd[21000]: Invalid user upload from 78.110.207.104
and these also show as multiple 'lastb' entries in btmp:
upload ssh:notty 78.110....
2000 Oct 24
3
openssh-SNAP-20001016
Using openssh-SNAP-20001016 all of our problems with hanging connections
have gone away (woohoo!), and it seems to be working flawlessly, but I am
seeing messages like this in syslog:
Oct 24 16:57:48 dhumb301 sshd[17752]: error: channel 0: internal error: we
do not read, but chan_read_failed for istate 8
Oct 24 16:57:59 dhumb301 sshd[17771]: error: select: Bad file descriptor
Oct 24 16:58:30