On Wed, 2013-09-11 at 17:42 +0200, Dag-Erling Smørgrav wrote: > Ian Lepore <i...@freebsd.org> writes: > > So what happens when there is no dns server to consult? Will every > > ssh connection have to wait for a long dns query timeout? What if the > > machine is configured to use only /etc/hosts? > > If there is no DNS server, no query will be sent. > > > What if a DNS server is configured but doesn't respond? > > The DNS request will time out. > > In the vast majority of cases, you will either have no DNS at all (so no > query will be sent), or you will have a functioning DNS server. In a > slightly less vast majority of cases, you will not be able to resolve > the server's IP address without DNS anyway. > > > For that matter, I just realized I'm a bit unclear on who is querying > > DNS for this info, the ssh client or the sshd? > > The client - and you can override this in your ~/.ssh/config or on the > command line (-oVerifyHostKeyDNS=no). > > DES > --
Thanks. If this is client-side I'm much less scared by it. At $work we have embedded systems with less than full network functionality, often including either /etc/hosts usage or worse, sometimes a dns is configured but unreachable, and we ssh into them a lot for development. -- Ian _______________________________________________ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
