Standard usage for UDP DNS is source port 53 to destination port 53 or source port 137 to destination port 53 (from Microsoft clients). This is because DNS normally happens between the system level DNS resolver process and the DNS server, not from a user level service for Unix. MS has no concept of privileged ports so client software uses the low number port.
To: [EMAIL PROTECTED] cc: (bcc: Bill Royds/HullOttawa/PCH/CA) Subject: udp to port 53 I see alot of attempted udp connections to port 53 on my dns servers but the source is less than 1024. According to the O'Reilly book I shouldn't have to allow this. Source port is in the 600, 700, 800, 900 area. Should I be allowing this? Thanks. _______________________________________________ Firewalls mailing list [EMAIL PROTECTED] http://lists.gnac.net/mailman/listinfo/firewalls _______________________________________________ Firewalls mailing list [EMAIL PROTECTED] http://lists.gnac.net/mailman/listinfo/firewalls
