To subscribe to Firewalls-Digest, send the command:

    subscribe firewalls-digest

in the body of a message to "Majordomo@GreatCircle.COM".  If you want
to subscribe something other than the account the mail is coming from,
such as a local redistribution list, then append that address to the
"subscribe" command; for example, to subscribe "local-firewalls":

    subscribe firewalls-digest local-firewalls@your.domain.net

A non-digest (direct mail) version of this list is also available; to
subscribe to that instead, replace all instances of "firewalls-digest"
in the commands above with "firewalls".

Back issues are available for anonymous FTP from FTP.GreatCircle.COM, in
pub/firewalls/digest/vNN.nMMM (where "NN" is the volume number, and "MMM"
is the issue number).