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
