2016-10-21 14:40 GMT+03:00 Adam D. Barratt <a...@adam-barratt.org.uk>: > On 2016-10-21 12:26, Martin-Éric Racine wrote: >> >> Unable to negotiate with 172.16.1.254 port 22: no matching key >> exchange method found. Their offer: diffie-hellman-group1-sha1 >> >> I get the above error when trying to connect to a router using >> openssh-client from Testing. >> >> Connecting using the openssh-client from Stable works as expected. > > > That's to be expected, given: > > openssh (1:7.1p1-1) unstable; urgency=medium > > * New upstream release (http://www.openssh.com/txt/release-7.0, closes: > #785190): > - Support for the legacy SSH version 1 protocol is disabled by default > at compile time. > - Support for the 1024-bit diffie-hellman-group1-sha1 key exchange is > disabled by default at run-time. It may be re-enabled using the > instructions at http://www.openssh.com/legacy.html
That would indeed explain it. Exception added in .ssh/config for that subnet. Thanks! Martin-Éric