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go to aa25srv.ini

[Engine.GameEngine]
CacheSizeMegs=64 change to 256

[IpDrv.TcpNetDriver]
KeepAliveTime=0.2 change to 0
NetServerMaxTickRate=20 change to 50

save it and restrt the server, have fun

I would NOT touch keep alive time. if I'm not mistaken thats the servers sending packets to make sure player are there, 0.2 is fine, what "improve ping" is NetTickRate and MaxClientRate so u must LEAVE it on 0.2.

side notes:
higher NetTickRate will make the server use more CPU and both Tick and MaxClientRate will make the server use more bandwidth, ask your host before doing such changes cuz some do not allow you to do.

MaxClientRate is also what limit the max client NetSpeed, so MaxCleintRate will be the max netspeed avaliabe for the client NetSpeed can be set higher than '10000' since some updates we have did, no worries about cvar kicks(max of 80000! min of 2700!)

changing rates can make you get kills a bit easier but get killed the same easy way.

http://wiki.unrealadmin.org/Netspeed_Tutorial_%28UT%29

the fact is that did made ping less by 10-15 ms, i know all the unreal wiki tutorials. if you hit while in server netstats you will see packets in by deafult 20-25(dynamic) with the setting i posted above it stays static by 52 packets in, better bullet registration, but it needs to be tested when server is full.

yea but tickrate 50 & maxclientrate 25000 should be more than enough.
UDP ping might be lower, my ping is always lower than in the server browser.

According to Epic, changing CacheSizeMegs won't do anything for a server so leave it at it's default value.
NetServerMaxTickRate: is how many "frames" an Internet server operates at. It is an important setting in that it will affect CPU usage. Some admins will set this higher believing that it improves ping but that is nonsense. Also, higher tick rates will influence the power of weapons such as the pulse cannon and minigun in a noticeable way.
MaxClientRate: controls the maximum netspeed a client will use when connected to the server.
KeepAliveTime: This is the time a server will send a packet regardless of whether it needs to update possible packet alive time.

kriz is right, dont trust everything u read on the internet. test it urself. I never had 55 ping in a germany server before, and the hit registration and server performance was pretty good. just need to test it with more ppl now

Null means None ou nenhum, servidor não precisa renderizar nada
e tambem não usa/reproduz sons. por isso esta em NullRender e UseSound False

Wouldnt it be wise to deadicate even more memory to the game server? I mean 256 is miniscule for todays computers. I would think 1, 1.5 or 2 gig would be doable and help any?

I also change the engine cache game in the userini

Really? Even when server limits are higher like 26 man servers? Im just comparing to having seen a mine craft server and even only 4 people playing it gets quite demanding...But I suppose its a more server demanding game size wize with building maps and stuff

I try it to, but only the CacheSizeMegs=64 to 256 on 1 server