server - Ubuntu after upgrade - ssh exchange failed - Ask Ubuntu


i have little bit problem after upgrading ubuntu 14.04 16.04. i've try estabilish ssh connections servers trough ssh after upgrade in cases have these output:

unable negotiate 10.13.45.221 port 22: no matching key exchange method found. offer: diffie-hellman-group1-sha1

i know adding : ssh -okexalgorithms=+diffie-hellman-group1-sha1 user@legacyhost

but maybe way enable globally , use ssh user@host in 14.04?

this means diffie-hellman-group1-sha1 not present in default set of key exchange algorithms.

to ssh option permanent, add follwoing ~/.ssh/config (or globally in /etc/ssh/ssh_config):

kexalgorithms=+diffie-hellman-group1-sha1

be careful host, match etc selective declarations while adding directive if want globally values inside snippets apply mentioned set only. whenever unsure, put @ top.


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