I have tried most rules given in different forums, including rules suggested in this forum and none work.
During an attack server always goes offline in favorites/gametracker/HLSW.
[REUNION]: Blocking query flood from a lot of spoofed addresses: 101885 pps
[REUNION]: Blocking query flood from a lot of spoofed addresses: 114830 pps
[REUNION]: Blocking query flood from a lot of spoofed addresses: 113708 pps
[REUNION]: Blocking query flood from a lot of spoofed addresses: 126650 pps
[REUNION]: Blocking query flood from a lot of spoofed addresses: 142843 pps
[REUNION]: Blocking query flood from a lot of spoofed addresses: 102036 pps
With some rules i manage to bring down the pps to ~1000-2000, but the server is still 'offline'.