The sim uses only UDP traffic, so if the others using your Internet connection are using mostly TCP, and you can give priority to UDP traffic, that would be an easy first step.

 

There are two ends to each communication: the local end (your computer), and the server end (our server).

 

For the sim:

 

We use "ephemeral" ports on the local end. This means that your computer finds an unused port number and and uses it for its end of the connection. There is not much you will be able to do with that, since most programs do this same thing.

 

We use a fixed range of ports (15000-52500) on our race servers. Hopefully, you can specify port ranges, and not just individual port numbers.


Race Farms

We have three main farms for official races in iRacing series. There are also three additional farms which allow members to host sessions on servers that may be closer to them than our official series farms (which also allow hosting races).


  • Official & Hosted Sessions
    • US-East-OH
    • DE-Fra
    • AU-Syd
  • Hosted Sessions Only
    • US-West
    • JP-Tok
    • BR-Sao


Note: Race farms have dynamically allocated IPs.


See Also

Gathering Ping / Trace Data for Troubleshooting