blocking access to saslauthd

[Russell Bell]

     Quoth Dan White:  'Are you asking how to block all access to your
server except for port 25?
Could you clarify what activities you are trying to prevent?'

These entries,

May 10 04:10:44 monolake vsftpd: pam_succeed_if(vsftpd:auth): error
retrieving information about user Administrator
May 10 04:10:44 monolake vsftpd: pam_unix(vsftpd:auth): check pass; user unknown
May 10 04:10:44 monolake vsftpd: pam_unix(vsftpd:auth): authentication
failure; logname= uid=0 euid=0 tty=ftp ruser=Administrator
rhost=219.232.225.213

of which I am finding tens of thousands daily in /var/log/secure.

I hope you're laying off the Twinkies.