On Tuesday December 6 2016 18:13:18 Brandon Allbery wrote:

>Unless things are configured to log to wtmp by IP address, these stopped
>working when hostnames got too long. OS doesn't matter. (wtmp has to set a

Possible that it's that, but this has never been a very standardised thing; my 
code is full of #ifdefs (then again, my fault I ran it on HPUX, A/UX, IRIX etc 
:))

>length limit, and good luck reconstructing from a prefix. It's been tried
>many times and is pretty much impossible.)

It would seem SSH_CONNECTION contains the remote IP, so there's that...

R.

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