Port filtering

The following ports are filtered on traffic coming into the CSAIL network:

• 135/tcp (loc-srv)
• 135/udp (loc-srv)
• 137/tcp (netbios-ns)
• 137/udp (netbios-ns)
• 138/tcp (netbios-dgm)
• 138/udp (netbios-dgm)
• 139/tcp (netbios-ssn)
• 139/udp (netbios-ssn)
• 161/udp (snmp)
• 179/tcp (BGP)
• 445/tcp (microsoft-ds)
• 445/udp (microsoft-ds)
• 515/tcp (LPR/LPD)
• 631/tcp (IPP)
• 1433/tcp (ms-sql-s)
• 2967/tcp
• 3127/tcp (various worms)
• 5900/tcp (VNC)
• 5901/tcp (VNC)
• 6000/tcp (x11-xserver)
• 9100/tcp (jetdirect)