On 2015-04-08 13:46:06 -0400, Michael Graham wrote: > On 8 April 2015 at 13:41, Vincent Lefevre <vinc...@vinc17.net> wrote: > > # /usr/sbin/sshd -D -ddd -p 80 -f /etc/ssh/sshd_config 2>>(ts -s "%.s") > > [...] > > 3.315346 debug3: Trying to reverse map address 140.77.51.8. > > So sshd is doing the reverse lookup and fails
Yes, but with nslookup, the failure is *immediate*. So, this doesn't explain the 5-second delay. > You probably want to add (or modify) the UseDNS setting to your sshd > config file. > > UseDNS Specifies whether sshd(8) should look up the remote host name > and check that the resolved host name for the remote IP address maps > back to the very same IP address. The default is “yes”. Thanks, this solves the problem. (I've also reported the DNS issue to the sysadmin.) -- Vincent Lefèvre <vinc...@vinc17.net> - Web: <https://www.vinc17.net/> 100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/> Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon) -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/20150408181312.gb24...@xvii.vinc17.org