Table 1. Some Basic Client Options for ssh_config
Parameter Possible Values Description
CheckHostIP Yes / No (Default=yes)
Whether to notice unexpected
source-IPs for known host keys. Warns user each
time discrepancies found.
Cipher 3des blowfish (Default=3des)
Which block cipher should be used for encrypting
ssh v. sessions.
Ciphers 3des-cbc, Order in which to try block ciphers than can be
blowfish-cbc, arcfour, used for encrypting ssh v.2 sessions.
Compression Yes / No Whether to use gzip to compress encrypted session
data. Useful over limited-bandwidth connections,
but can add delay.
ForwardX11 Yes / No (Default=no)
Whether to redirect X connections over the encrypted
tunnel and to set DISPLAY accordingly. Very handy
Password- Yes / No Whether
Authentication to attempt to do (encrypted) UNIX password authentication
in addition to or instead of trying RSA/DSA.