Writing firewall ruleserts ... Recommend good procedure and resource for ports lookup?

["Mark (fat)" <fat () users sourceforge net>]

I have to write firewall rulesets for a pair of back to back dual vendor
firewalls with multiple DMZ's from each.

Can anyone recommend a good procedure to use. Opensource would be great
but you cant really beat a good book.

Also can anyone recommend a good resource for translating services into
ports etc

Thanks

Mark(fat)


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