[Hellfighter]

firewall: settings
stealth mod- enable
ant-port scan- enable

disable these two item, you should be able to stay in a host server or stats server without getting kickout

you will not get a error message on this ether

basic you were auto punt out in 3-5sec
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if the server is running a modded game then you can't join the server at all without the mod ether, think you get a error message on that say its a mod things error

when a server or a group of players host a modded game! all players need to have the same mod as the host is using same version of the mod too

my feeling about this is your firewall has two items enable

if it windows firewall you using enable the game is all is needed to connect to the internet