Filtered Ports: Difference between revisions

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== UTOPIA ==
We do not filter any ports for UTOPIA customers.


== Network Wide ==
The following ports are filtered at XMission's borders, primarily due to their abuse in "Denial of Service" attacks.


*19 (udp) chargen
== Yellowstone Fiber ==
*1900 (udp) SSDP
We do not filter or block any ports on Yellowstone Fiber. However, while we are not filtering any ports, if you need port forwarding, please contact XMission for a static public IP address.
*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)
== Colocation ==
*137-139 (tcp, udp) NETBIOS
We do not filter any ports for colocation customers.
*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


[[Category:Troubleshooting]]
[[Category:Troubleshooting]]

Latest revision as of 10:09, 16 June 2026

UTOPIA

We do not filter any ports for UTOPIA customers.


Yellowstone Fiber

We do not filter or block any ports on Yellowstone Fiber. However, while we are not filtering any ports, if you need port forwarding, please contact XMission for a static public IP address.


Colocation

We do not filter any ports for colocation customers.

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