How to deny suspicious hosts
Lately We have been getting ssh errors such as this:
Invalid user tky from 222.73.216.8
fatal: initgroups: NOUSER: No such file or directory
/etc/sshd_config line 74: Unsupported option KerberosGetAFSToken
Invalid user tkz from 222.73.216.8
fatal: initgroups: NOUSER: No such file or directory
/etc/sshd_config line 74: Unsupported option KerberosGetAFSToken
But several 100s of them. We have OSX server 10.5 and from what I understand this has an adaptive firewall. Well it doesn't seem to be doing much. We also have a hosts.allow file with just the ip address that are allowed to connect. That doesn't seem to be stopping these attacks either.
What can I do to prevent these attacks?
xserve 10.5