Subject: TCP-MD5
To: None <current-users@netbsd.org>
From: john heasley <heas@shrubbery.net>
List: current-users
Date: 04/28/2004 00:04:09 
tcp(4):

           algorithm       keylen (bits)
           tcp-md5         8 to 640        tcp: rfc2385

Is that corrent, a minimum length of 8?  Though silly, afaik all the
router implementations i've touched have a minimum length of 1.