There are several ports blocked according to the instructions of the HUT Computing Centre.
| Service | TCP | UDP | Notice |
|---|---|---|---|
| echo, discard etc. | 0-19 | 0-19 | |
| telnet | 23 | 23 | |
| smtp | 25 | except to smtp.hut.fi | |
| tftp | 69 | ||
| kerberos | 88 | 88 | |
| sunrpc | 111 | 111 | |
| netbios-* | 135-139 | 135-139 | |
| snmp, snmptrap | 161-162 | 161-162 | |
| slp | 427 | 427 | |
| microsoft-ds | 445 | 445 | |
| r-services | 512-514 | 513 | |
| ncp | 524 | 524 | |
| submission | 587 | 587 | |
| http-rpc-epmap | 593 | 593 | |
| Kazaa | 1214 | ||
| msg | 1241 | ||
| ms-sql-* | 1433-1434 | 1433-1434 | |
| tftp-mcast | 1758-1759 | 1758-1759 | |
| radius, radacct | 1812-1813 | 1812-1813 | |
| ssdp | 1900 | 1900 | |
| nfsd | 2049 | 2049 | |
| novell-ipx-cmd | 2645 | 2645 | |
| rdp | 3389 | ||
| eDonkey | 4661-4665 | 4661-4665 | |
| upnp | 5000 | 5000 | |
| x11 | 6000 | ||
| dameware | 6129 | ||
| analogx-proxy | 6588 |