File openssh-5.9p1-sshconfig-knownhostschanges.diff of Package openssh
Index: ssh_config
===================================================================
--- ssh_config.orig
+++ ssh_config
@@ -67,5 +67,13 @@ ForwardX11Trusted yes
SendEnv LANG LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE LC_MONETARY LC_MESSAGES
SendEnv LC_PAPER LC_NAME LC_ADDRESS LC_TELEPHONE LC_MEASUREMENT
SendEnv LC_IDENTIFICATION LC_ALL
-# VisualHostKey no
+
+# This will print the fingerprint of the host key in "visual" form
+# this should make it easier to also recognize bad things
+VisualHostKey no
+
+# This will hash new host keys and make them so unusable for malicious
+# people or software trying to use known_hosts to find further hops.
+HashKnownHosts yes
+
# ProxyCommand ssh -q -W %h:%p gateway.example.com