Filtered Ports: Difference between revisions
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*53 (udp) domain - IP addresses that test positive for open recursion DNS servers | *53 (udp) domain - IP addresses that test positive for open recursion DNS servers | ||
*123 (udp) ntp - IP addresses that test positive for open query NTP servers | *123 (udp) ntp - IP addresses that test positive for open query NTP servers | ||
== DSL / Dialup == | == DSL / Dialup == | ||
We currently filter (block) the following ports on all DSL and Dialup connections by default: | We currently filter (block) the following ports on all DSL and Dialup connections by default: | ||
| Line 18: | Line 19: | ||
We filter and block these ports by default to cut down on the number of 'drive-by' infections. | We filter and block these ports by default to cut down on the number of 'drive-by' infections. | ||
== UTOPIA == | == UTOPIA == | ||
Currently at this time we do not have any filtered ports for customers specific to UTOPIA | Currently at this time we do not have any filtered ports for customers specific to UTOPIA | ||
[[Category:Troubleshooting]] | [[Category:Troubleshooting]] | ||
Revision as of 15:49, 3 September 2014
Network Wide
The following ports are filtered at XMission's borders.
- 19 (udp) chargen
- 1900 (udp) SSDP
- 53 (udp) domain - IP addresses that test positive for open recursion DNS servers
- 123 (udp) ntp - IP addresses that test positive for open query NTP servers
DSL / Dialup
We currently filter (block) the following ports on all DSL and Dialup connections by default:
- 135 (tcp, udp)
- 137-139 (tcp, udp) NETBIOS
- 445 (tcp, udp) Microsoft-DS (CIFS)
- 1433, 1434 (udp) MS SQL Server
- 4444 (tcp) Worm-sign
- 31337 (tcp) BackOrifice
We filter and block these ports by default to cut down on the number of 'drive-by' infections.
UTOPIA
Currently at this time we do not have any filtered ports for customers specific to UTOPIA