MUTP

Борьма с мелкими пакетами mUTP

правило для dgs-3426+pptp:

create access_profile profile_id 1 packet_content_mask offset_chunk_1 7 0x00FF0000 offset_chunk_2 15 0x0000FF00 offset_chunk_3 23 0x00FFFFFF offset_chunk_4 24 0xFFFF0000
config access_profile profile_id 1 add access_id auto_assign packet_content offset_chunk_1 0x2F000000 offset_chunk_2 0x11000000  offset_chunk_3 0x007FFFFF offset_chunk_4 0x00FFAB00 port 1-24 deny

для D-Link DGS3627 create access_profile profile_id 2 packet_content_mask offset_chunk_1 9 0xFFFF offset_chunk_2 13 0xFFFF offset_chunk_3 24 0xFFFFFFFF offset_chunk_4 25 0xFF000000 config access_profile profile_id 2 add access_id 1 packet_content offset_chunk_1 0x6A5 offset_chunk_2 0x21 offset_chunk_3 0x7FFFFFFF offset_chunk_4 0xAB000000 port 1:25,2:25 deny

Linux

-A FORWARD -m udp -p udp -m string --hex-string "|7F FF FF FF AB|" --algo kmp --from 40 --to 44 -m statistic --mode random --probability 0.90 -j DROP
-A FORWARD -m udp -p udp -m string --hex-string "|7F FF FF FF AB|" --algo kmp --from 40 --to 44 -j DROP