Thanks for the input and explanation, I changed the names so they start with a letter. Martin On Thu, Mar 2, 2017 at 2:24 PM, Nico Kadel-Garcia <nkadel@xxxxxxxxx> wrote: > On Thu, Mar 2, 2017 at 7:09 AM, Darren Tucker <dtucker@xxxxxxxxxx> wrote: > > On Thu, Mar 2, 2017 at 10:46 PM, Martin Rys <spleefer90@xxxxxxxxx> > wrote: > > [...] > >> `ssh user@330` - That gets me an error: > >> ssh: connect to host 330 port 22: Invalid argument > >> > >> I'm assuming that when the hostname is pure number, it ignores domain > >> suffix. As just a number cannot be an actual IP, could this behavior be > >> fixed in OpenSSH? > > > > not really, the behaviour in question is in they system libraries, > > which think it's an IP address (single numeric, number.number and > > octal are all valid but uncommon representations of IP addresses). > > > > $ gethostip localhost > > localhost.localdomain 127.0.0.1 7F000001 > > > > $ gethostip 330 > > 330 0.0.1.74 0000014A > > > > $ telnet 330 > > Trying 0.0.1.74... > > telnet: connect to address 0.0.1.74: Invalid argument > > > > You can work around it with an entry in ~/.ssh/config: > > > > Host 300 > > Hostname 330.blah.domain.com > > Note that SSH is hardly the only tool vulnerable to t his problem. > This is why most of us never use raw numbers as shortened hostnames, > even if it is convenient on occasion. > _______________________________________________ openssh-unix-dev mailing list openssh-unix-dev@xxxxxxxxxxx https://lists.mindrot.org/mailman/listinfo/openssh-unix-dev
