屑俺日記

☆ Deprecated option

sshで入ると、たまに出ていた。

$ sudo systemctl status ssh
● ssh.service - OpenBSD Secure Shell server
   Loaded: loaded (/lib/systemd/system/ssh.service; enabled;
 vendor preset: enabled)
   Active: active (running) since Thu 2017-10-19 09:46:45 JST; 3s ago
Main PID: 16923 (sshd)
    Tasks: 1 (limit: 4915)
   CGroup: /system.slice/ssh.service
           └─16923 /usr/sbin/sshd -D
 
Oct 19 09:46:45 newkuzu sshd[16923]: /etc/ssh/sshd_config line 19:
 Deprecated option KeyRegenerationInterval
Oct 19 09:46:45 newkuzu sshd[16923]: /etc/ssh/sshd_config line 20:
 Deprecated option ServerKeyBits
Oct 19 09:46:45 newkuzu sshd[16923]: /etc/ssh/sshd_config line 32:
 Deprecated option RSAAuthentication 
Oct 19 09:46:45 newkuzu sshd[16923]: /etc/ssh/sshd_config line 39:
 Deprecated option RhostsRSAAuthentication
Oct 19 09:46:45 newkuzu sshd[16923]: Server listening on 0.0.0.0 port 22.
Oct 19 09:46:45 newkuzu sshd[16923]: Server listening on :: port 22.
Oct 19 09:46:45 newkuzu systemd[1]: Started OpenBSD Secure Shell server.

オプションを確認した限り、設定してなくても問題なさげに思えた。
で、コメントアウト。

$ sudo sed -i   '19,20s/^/# /;32s/^/# /;39s/^/# /' /etc/ssh/sshd_config
 
$ sudo sed -n '19p;20p;32p;39p' /etc/ssh/sshd_config
# KeyRegenerationInterval 3600
# ServerKeyBits 1024
# RSAAuthentication yes
# RhostsRSAAuthentication no

$ sudo systemctl status ssh
● ssh.service - OpenBSD Secure Shell server
   Loaded: loaded (/lib/systemd/system/ssh.service; enabled; 
vendor preset: enabled)
   Active: active (running) since Thu 2017-10-19 09:59:32 JST; 2s ago
 Main PID: 16964 (sshd)
    Tasks: 1 (limit: 4915)
   CGroup: /system.slice/ssh.service
           └─16964 /usr/sbin/sshd -D
 
Oct 19 09:59:32 newkuzu systemd[1]: Starting OpenBSD Secure Shell server...
Oct 19 09:59:32 newkuzu sshd[16964]: Server listening on 0.0.0.0 port 22.
Oct 19 09:59:32 newkuzu sshd[16964]: Server listening on :: port 22.
Oct 19 09:59:32 newkuzu systemd[1]: Started OpenBSD Secure Shell server.