Permission denied (publickey,gssapi-keyex,gssapi-with-mic)

ssh -v -i /root/test_keys/id_dsa test@test.test
...
debug1: Skipping ssh-dss key /root/test_keys/id_dsa - not in PubkeyAcceptedKeyTypes
...
Permission denied (publickey,gssapi-keyex,gssapi-with-mic)

ssh -i /root/test_keys/id_dsa test@fortest.host -o "PubkeyAcceptedKeyTypes +ssh-dss"

The new openssh version — 7.0+ does not support DSA keys anymore