SSH

Posted on Jan 29, 2022

 

configuration on server side

on the /etc/ssh/sshd_config* AllowGroups   wheel

  • PasswordAuthentication no
  • AuthenticationMethods publickey
  • PermitRootLogin no

access server

put public key into server side ~/.ssh/authorized_keys and then use private key on your computer to access remote server.## SSH2_MSG_KEX_ECDH_REPLY

if encounter “SSH2_MSG_KEX_ECDH_REPLY” issue, try * KexAlgorithms

  • ssh -oKexAlgorithms=ecdh-sha2-nistp521 server
  • KexAlgorithms ecdh-sha2-nistp521 in ~/.ssh/config
  • see link for detail and Key Exchange Method for background
  • MTU
  • see link for background
  • ip link set mtu 1200