We have decided to block several ports at our edge routers:
PORT | TRANSPORT | PROTOCOL | DIRECTION | REASON FOR BLOCK | IP VERSION |
111 | UDP | RPC | BOTH | Malicous Attacks | IPv4/6 |
135-139 | TCP/UDP | NetBios | BOTH | Worms, Viruses | IPv4/6 |
445 | TCP | MS-DS/NetBios | BOTH | Worms, Viruses | IPv4/6 |
520 | UDP | RIP | BOTH | Malicous Attacks | IPv4 |
1433 | TCP | MS-SQL | BOTH | Worms,Trojans | IPv4/6 |
1434 | UDP | MS-SQL | BOTH | Worms,SQLslammer | IPv4/6 |
1080 | TCP | SOCKS | BOTH | Viruses, Worms, DoS Attacks | IPv4/6 |
1900 | UDP | SSDP | BOTH | DoS Attacks | IPv4/6 |
Should there be a reason why you need these ports open for your IP on our network please do open up a support request at https://myportal.ocosa.net/submitticket.php?step=2&deptid=1.