SyGate 5.0 - Insecure UDP Source Port Firewall Bypass Weak Default Configuration
source: https://www.securityfocus.com/bid/6684/info
It has been reported that the Sygate Pro firewall permits traffic originating from UDP source port 137 or 138 by default. This may allow a remote attacker to bypass the firewall.
nmap -vv -P0 -sU %victims_ip_address% -g 137