Re: Re: Re: trouble about IP Fragmentation by using the Linux Virtual Server

[<frederic.buche@xxxxxxxxxx>]

Hello Julian,

Our trouble has now disappeer with the patch you gave me.
Is it only a temporary patch or can I include it definitely on my system ?

tcpdump's logs of a "patched" connection:

10:02:14.544264 195.101.125.28.18232 > 195.6.241.14.smtp: S [tcp sum ok] 71611:71611(0) win 8192 <mss 1460> (DF) [tos 0x10]  (ttl 124, id 55327, len 44)
10:02:14.544301 195.101.125.28.18232 > 195.6.241.14.smtp: S [tcp sum ok] 71611:71611(0) win 8192 <mss 1460> (DF) [tos 0x10]  (ttl 124, id 55327, len 44)
10:02:14.545925 195.101.125.28.18232 > 195.6.241.14.smtp: . [bad tcp cksum 8291!] 71612:71612(0) ack 466327435 win 0 (DF) (ttl 59, id 21494, len 40)
10:02:14.545946 195.101.125.28.18232 > 195.6.241.14.smtp: . [bad tcp cksum 8291!] 0:0(0) ack 1 win 0 (DF) (ttl 59, id 21494, len 40)
10:02:14.732048 195.101.125.28.18232 > 195.6.241.14.smtp: . [tcp sum ok] 0:0(0) ack 1 win 8760 (DF) [tos 0x10]  (ttl 124, id 55583, len 40)
10:02:14.732068 195.101.125.28.18232 > 195.6.241.14.smtp: . [tcp sum ok] 0:0(0) ack 1 win 8760 (DF) [tos 0x10]  (ttl 124, id 55583, len 40)
10:02:14.946394 195.101.125.28.18232 > 195.6.241.14.smtp: P [tcp sum ok] 0:16(16) ack 114 win 8647 (DF) [tos 0x10]  (ttl 124, id 56095, len 56)
10:02:14.946416 195.101.125.28.18232 > 195.6.241.14.smtp: P [tcp sum ok] 0:16(16) ack 114 win 8647 (DF) [tos 0x10]  (ttl 124, id 56095, len 56)
10:02:15.142697 195.101.125.28.18232 > 195.6.241.14.smtp: P [tcp sum ok] 16:45(29) ack 157 win 8604 (DF) [tos 0x10]  (ttl 124, id 56351, len 69)
10:02:15.142717 195.101.125.28.18232 > 195.6.241.14.smtp: P [tcp sum ok] 16:45(29) ack 157 win 8604 (DF) [tos 0x10]  (ttl 124, id 56351, len 69)
10:02:15.304470 195.101.125.28.18232 > 195.6.241.14.smtp: P [tcp sum ok] 45:82(37) ack 190 win 8571 (DF) [tos 0x10]  (ttl 124, id 56607, len 77)
10:02:15.304487 195.101.125.28.18232 > 195.6.241.14.smtp: P [tcp sum ok] 45:82(37) ack 190 win 8571 (DF) [tos 0x10]  (ttl 124, id 56607, len 77)
10:02:15.451928 195.101.125.28.18232 > 195.6.241.14.smtp: P [tcp sum ok] 82:88(6) ack 234 win 8527 (DF) [tos 0x10]  (ttl 124, id 56863, len 46)
10:02:15.451946 195.101.125.28.18232 > 195.6.241.14.smtp: P [tcp sum ok] 82:88(6) ack 234 win 8527 (DF) [tos 0x10]  (ttl 124, id 56863, len 46)
10:02:16.119955 195.101.125.28.18232 > 195.6.241.14.smtp: . 88:1516(1428) ack 295 win 8466 (frag 57119:1448@0+) [tos 0x10]  (ttl 124, len 1468)
10:02:16.120019 195.101.125.28.18232 > 195.6.241.14.smtp: . 88:1548(1460) ack 295 win 8466 [tos 0x10]  (ttl 124, id 57119, len 1500)
10:02:16.120464 195.101.125.28.18232 > 195.6.241.14.smtp: P 1548:1893(345) ack 295 win 8466 (DF) [tos 0x10]  (ttl 124, id 57375, len 385)
10:02:16.120485 195.101.125.28.18232 > 195.6.241.14.smtp: P 1548:1893(345) ack 295 win 8466 (DF) [tos 0x10]  (ttl 124, id 57375, len 385)
10:02:16.385585 195.101.125.28.18232 > 195.6.241.14.smtp: P [tcp sum ok] 1893:1898(5) ack 295 win 8466 (DF) [tos 0x10]  (ttl 124, id 57887, len 45)
10:02:16.385603 195.101.125.28.18232 > 195.6.241.14.smtp: P [tcp sum ok] 1893:1898(5) ack 295 win 8466 (DF) [tos 0x10]  (ttl 124, id 57887, len 45)
10:02:16.617992 195.101.125.28.18232 > 195.6.241.14.smtp: P [tcp sum ok] 1898:1904(6) ack 351 win 8410 (DF) [tos 0x10]  (ttl 124, id 58143, len 46)
10:02:16.618013 195.101.125.28.18232 > 195.6.241.14.smtp: P [tcp sum ok] 1898:1904(6) ack 351 win 8410 (DF) [tos 0x10]  (ttl 124, id 58143, len 46)
10:02:16.796023 195.101.125.28.18232 > 195.6.241.14.smtp: F [tcp sum ok] 1904:1904(0) ack 405 win 8356 (DF) [tos 0x10]  (ttl 124, id 58399, len 40)
10:02:16.796043 195.101.125.28.18232 > 195.6.241.14.smtp: F [tcp sum ok] 1904:1904(0) ack 405 win 8356 (DF) [tos 0x10]  (ttl 124, id 58399, len 40)
10:02:16.804110 195.101.125.28.18232 > 195.6.241.14.smtp: . [tcp sum ok] 1905:1905(0) ack 406 win 8356 (DF) [tos 0x10]  (ttl 124, id 58655, len 40)
10:02:16.804131 195.101.125.28.18232 > 195.6.241.14.smtp: . [tcp sum ok] 1905:1905(0) ack 406 win 8356 (DF) [tos 0x10]  (ttl 124, id 58655, len 40)



thank you very much

Frédéric BUCHE
maito : frederic.buche@xxxxxxxxxx