I get connection reset by peer for a pop3 connection from our remote site only - TCP-IP

This is a discussion on I get connection reset by peer for a pop3 connection from our remote site only - TCP-IP ; Hi, Here is the output of a tcpdump -vvv -XX host 221.237.165.x. on mailhost. 16:12:50.549008 IP (tos 0x0, ttl 42, id 5646, offset 0, flags [DF], proto 6, length: 60) 221.228.x.x.21838 > mailhost.pop3: S [tcp sum ok] 2558315381:2558315381(0) win 5840 ...

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Thread: I get connection reset by peer for a pop3 connection from our remote site only

  1. I get connection reset by peer for a pop3 connection from our remote site only

    Hi,

    Here is the output of a tcpdump -vvv -XX host 221.237.165.x. on
    mailhost.

    16:12:50.549008 IP (tos 0x0, ttl 42, id 5646, offset 0, flags [DF],
    proto 6, length: 60) 221.228.x.x.21838 > mailhost.pop3: S [tcp sum ok]
    2558315381:2558315381(0) win 5840 0,nop,wscale 0>
    0x0000: 000c f1d1 8c7e 0010 db7e 6ec5 0800 4500
    ......~...~n...E.
    0x0010: 003c 160e 4000 2a06 ec88 dded a589 c0a8
    ..<..@.*.........
    0x0020: 0a06 554e 006e 987c cb75 0000 0000 a002
    ...UN.n.|.u......
    0x0030: 16d0 4b08 0000 0204 05b4 0402 080a 00df
    ...K.............
    0x0040: dd7b 0000 0000 0103 0300 .{........
    16:12:50.549051 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto
    6, length: 60) mailhost.pop3 > 221.228.x.x.21838: S [tcp sum ok]
    4171883621:4171883621(0) ack 2558315382 win 5792 1460,sackOK,timestamp 2476124731 14671227,nop,wscale 2>
    0x0000: 0010 db7e 6ec5 000c f1d1 8c7e 0800 4500
    ....~n......~..E.
    0x0010: 003c 0000 4000 4006 ec96 c0a8 0a06 dded
    ..<..@.@.........
    0x0020: a589 006e 554e f8a9 e465 987c cb76 a012
    ....nUN...e.|.v..
    0x0030: 16a0 3043 0000 0204 05b4 0402 080a 9396
    ...0C............
    0x0040: aa3b 00df dd7b 0103 0302 .;...{....
    16:12:50.758381 IP (tos 0x0, ttl 42, id 5647, offset 0, flags [DF],
    proto 6, length: 52) 221.228.x.x.21838 > mailhost.pop3: . [tcp sum ok]
    1:1(0) ack 1 win 5840
    0x0000: 000c f1d1 8c7e 0010 db7e 6ec5 0800 4500
    ......~...~n...E.
    0x0010: 0034 160f 4000 2a06 ec8f dded a589 c0a8
    ..4..@.*.........
    0x0020: 0a06 554e 006e 987c cb76 f8a9 e466 8010
    ...UN.n.|.v...f..
    0x0030: 16d0 5ec5 0000 0101 080a 00df dd90 9396
    ...^.............
    0x0040: aa3b .;
    16:12:50.764867 IP (tos 0x0, ttl 64, id 20330, offset 0, flags [DF],
    proto 6, length: 95) mailhost.pop3 > 221.228.x.x.21838: P 1:44(43) ack
    1 win 1448
    0x0000: 0010 db7e 6ec5 000c f1d1 8c7e 0800 4500
    ....~n......~..E.
    0x0010: 005f 4f6a 4000 4006 9d09 c0a8 0a06 dded
    .._Oj@.@.........
    0x0020: a589 006e 554e f8a9 e466 987c cb76 8018
    ....nUN...f.|.v..
    0x0030: 05a8 4e77 0000 0101 080a 9396 ab13 00df
    ...Nw............
    0x0040: dd90 2b4f 4b20 504f 5033 206d 6169 6c68
    ...+OK.POP3.mailh
    0x0050: 6f73 7420 7632 3030 332e 3833 7268 2073
    ost.v2003.83rh.s
    16:12:50.973622 IP (tos 0x0, ttl 42, id 5648, offset 0, flags [DF],
    proto 6, length: 52) 221.228.x.x.21838 > mailhost.pop3: . [tcp sum ok]
    1:1(0) ack 44 win 5840
    0x0000: 000c f1d1 8c7e 0010 db7e 6ec5 0800 4500
    ......~...~n...E.
    0x0010: 0034 1610 4000 2a06 ec8e dded a589 c0a8
    ..4..@.*.........
    0x0020: 0a06 554e 006e 987c cb76 f8a9 e491 8010
    ...UN.n.|.v......
    0x0030: 16d0 5dad 0000 0101 080a 00df dda5 9396
    ...].............
    0x0040: ab13 ..
    16:12:50.973995 IP (tos 0x0, ttl 42, id 5649, offset 0, flags [DF],
    proto 6, length: 58) 221.228.x.x.21838 > mailhost.pop3: P [tcp sum ok]
    1:7(6) ack 44 win 5840
    0x0000: 000c f1d1 8c7e 0010 db7e 6ec5 0800 4500
    ......~...~n...E.
    0x0010: 003a 1611 4000 2a06 ec87 dded a589 c0a8
    ..:..@.*.........
    0x0020: 0a06 554e 006e 987c cb76 f8a9 e491 8018
    ...UN.n.|.v......
    0x0030: 16d0 bd12 0000 0101 080a 00df dda5 9396
    .................
    0x0040: ab13 4341 5041 0d0a ..CAPA..
    16:12:50.974132 IP (tos 0x0, ttl 64, id 20332, offset 0, flags [DF],
    proto 6, length: 52) mailhost.pop3 > 221.228.x.x.21838: . [tcp sum ok]
    44:44(0) ack 7 win 1448
    0x0000: 0010 db7e 6ec5 000c f1d1 8c7e 0800 4500
    ....~n......~..E.
    0x0010: 0034 4f6c 4000 4006 9d32 c0a8 0a06 dded
    ..4Ol@.@..2......
    0x0020: a589 006e 554e f8a9 e491 987c cb7c 8010
    ....nUN.....|.|..
    0x0030: 05a8 6dfe 0000 0101 080a 9396 abe4 00df
    ...m.............
    0x0040: dda5 ..
    16:12:50.974175 IP (tos 0x0, ttl 64, id 20334, offset 0, flags [DF],
    proto 6, length:.x) mailhost.pop3 > 221.228.x.137.21838: P 44:129(85)
    ack 7 win 1448
    0x0000: 0010 db7e 6ec5 000c f1d1 8c7e 0800 4500
    ....~n......~..E.
    0x0010: 0089 4f6e 4000 4006 9cdb c0a8 0a06 dded
    ...On@.@.........
    0x0020: a589 006e 554e f8a9 e491 987c cb7c 8018
    ....nUN.....|.|..
    0x0030: 05a8 4ea1 0000 0101 080a 9396 abe4 00df
    ...N.............
    0x0040: dda5 2b4f 4b20 4361 7061 6269 6c69 7479
    ...+OK.Capability
    0x0050: 206c 6973 7420 666f 6c6c 6f77 733a 0d0a
    ..list.follows:..
    16:12:51.183867 IP (tos 0x0, ttl 42, id 5650, offset 0, flags [DF],
    proto 6, length: 63) 221.228.x.x.21838 > mailhost.pop3: P [tcp sum ok]
    7:18(11) ack 129 win 5840
    0x0000: 000c f1d1 8c7e 0010 db7e 6ec5 0800 4500
    ......~...~n...E.
    0x0010: 003f 1612 4000 2a06 ec81 dded a589 c0a8
    ..?..@.*.........
    0x0020: 0a06 554e 006e 987c cb7c f8a9 e4e6 8018
    ...UN.n.|.|......
    0x0030: 16d0 b9d0 0000 0101 080a 00df ddba 9396
    .................
    0x0040: abe4 5553 4552 2062 6873 750d 0a ..USER.bh$u..
    16:12:51.184078 IP (tos 0x0, ttl 64, id 20336, offset 0, flags [DF],
    proto 6, length: 93) mailhost.pop3 > 221.228.x.x.21838: P 129:170(41)
    ack 18 win 1448
    0x0000: 0010 db7e 6ec5 000c f1d1 8c7e 0800 4500
    ....~n......~..E.
    0x0010: 005d 4f70 4000 4006 9d05 c0a8 0a06 dded
    ..]Op@.@.........
    0x0020: a589 006e 554e f8a9 e4e6 987c cb87 8018
    ....nUN.....|....
    0x0030: 05a8 4e75 0000 0101 080a 9396 acb6 00df
    ...Nu............
    0x0040: ddba 2b4f 4b20 5573 6572 206e 616d 6520
    ...+OK.User.name.
    0x0050: 6163 6365 7074 6564 2c20 7061 7373 776f
    accepted,.passwo
    16:12:51.393371 IP (tos 0x0, ttl 42, id 5651, offset 0, flags [DF],
    proto 6, length: 66) 221.228.x.x.21838 > mailhost.pop3: P [tcp sum ok]
    18:32(14) ack 170 win 5840
    0x0000: 000c f1d1 8c7e 0010 db7e 6ec5 0800 4500
    ......~...~n...E.
    0x0010: 0042 1613 4000 2a06 ec7d dded a589 c0a8
    ..B..@.*..}......
    0x0020: 0a06 554e 006e 987c cb87 f8a9 e50f 8018
    ...UN.n.|........
    0x0030: 16d0 7e50 0000 0101 080a 00df ddcf 9396
    ...~P............
    0x0040: acb6 5041 5353 2074 6573 7431 3233 0d0a
    ...PASS.rate4us..
    16:12:51.419980 IP (tos 0x0, ttl 64, id 20338, offset 0, flags [DF],
    proto 6, length: 84) mailhost.pop3 > 221.228.x.x.21838: P 170:202(32)
    ack 32 win 1448
    0x0000: 0010 db7e 6ec5 000c f1d1 8c7e 0800 4500
    ....~n......~..E.
    0x0010: 0054 4f72 4000 4006 9d0c c0a8 0a06 dded
    ..TOr@.@.........
    0x0020: a589 006e 554e f8a9 e50f 987c cb95 8018
    ....nUN.....|....
    0x0030: 05a8 4e6c 0000 0101 080a 9396 ada2 00df
    ...Nl............
    0x0040: ddcf 2b4f 4b20 4d61 696c 626f 7820 6f70
    ...+OK.Mailbox.op
    0x0050: 656e 2c20 3534 3720 6d65 7373 6167 6573
    en,.547.messages
    16:12:51.628968 IP (tos 0x0, ttl 42, id 5652, offset 0, flags [DF],
    proto 6, length: 58) 221.228.x.x.21838 > mailhost.pop3: P [tcp sum ok]
    32:38(6) ack 202 win 5840
    0x0000: 000c f1d1 8c7e 0010 db7e 6ec5 0800 4500
    ......~...~n...E.
    0x0010: 003a 1614 4000 2a06 ec84 dded a589 c0a8
    ..:..@.*.........
    0x0020: 0a06 554e 006e 987c cb95 f8a9 e52f 8018
    ...UN.n.|...../..
    0x0030: 16d0 b984 0000 0101 080a 00df dde7 9396
    .................
    0x0040: ada2 4341 5041 0d0a ..CAPA..
    16:12:51.629135 IP (tos 0x0, ttl 64, id 20340, offset 0, flags [DF],
    proto 6, length:.x) mailhost.pop3 > 221.228.x.137.21838: P 202:287(85)
    ack 38 win 1448
    0x0000: 0010 db7e 6ec5 000c f1d1 8c7e 0800 4500
    ....~n......~..E.
    0x0010: 0089 4f74 4000 4006 9cd5 c0a8 0a06 dded
    ...Ot@.@.........
    0x0020: a589 006e 554e f8a9 e52f 987c cb9b 8018
    ....nUN.../.|....
    0x0030: 05a8 4ea1 0000 0101 080a 9396 ae73 00df
    ...N..........s..
    0x0040: dde7 2b4f 4b20 4361 7061 6269 6c69 7479
    ...+OK.Capability
    0x0050: 206c 6973 7420 666f 6c6c 6f77 733a 0d0a
    ..list.follows:..
    16:12:51.838470 IP (tos 0x0, ttl 42, id 5653, offset 0, flags [DF],
    proto 6, length: 58) 221.228.x.x.21838 > mailhost.pop3: P [tcp sum ok]
    38:44(6) ack 287 win 5840
    0x0000: 000c f1d1 8c7e 0010 db7e 6ec5 0800 4500
    ......~...~n...E.
    0x0010: 003a 1615 4000 2a06 ec83 dded a589 c0a8
    ..:..@.*.........
    0x0020: 0a06 554e 006e 987c cb9b f8a9 e584 8018
    ...UN.n.|........
    0x0030: 16d0 ac28 0000 0101 080a 00df ddfc 9396
    ....(............
    0x0040: ae73 4c49 5354 0d0a .sLIST..
    16:12:51.838762 IP (tos 0x0, ttl 64, id 20342, offset 0, flags [DF],
    proto 6, length: 1076) mailhost.pop3 > 221.228.x.x.21838: P
    287:1311(1024) ack 44 win 1448
    0x0000: 0010 db7e 6ec5 000c f1d1 8c7e 0800 4500
    ....~n......~..E.
    0x0010: 0434 4f76 4000 4006 9928 c0a8 0a06 dded
    ..4Ov@.@..(......
    0x0020: a589 006e 554e f8a9 e584 987c cba1 8018
    ....nUN.....|....
    0x0030: 05a8 524c 0000 0101 080a 9396 af45 00df
    ...RL.........E..
    0x0040: ddfc 2b4f 4b20 4d61 696c 626f 7820 7363
    ...+OK.Mailbox.sc
    0x0050: 616e 206c 6973 7469 6e67 2066 6f6c 6c6f
    an.listing.follo
    16:12:51.838999 IP (tos 0x0, ttl 64, id 20344, offset 0, flags [DF],
    proto 6, length: 1500) mailhost.pop3 > 221.228.x.x.21838: .
    1311:2759(1448) ack 44 win 1448
    0x0000: 0010 db7e 6ec5 000c f1d1 8c7e 0800 4500
    ....~n......~..E.
    0x0010: 05dc 4f78 4000 4006 977e c0a8 0a06 dded
    ...Ox@.@..~......
    0x0020: a589 006e 554e f8a9 e984 987c cba1 8010
    ....nUN.....|....
    0x0030: 05a8 53f4 0000 0101 080a 9396 af45 00df
    ...S..........E..
    0x0040: ddfc 390d 0a31 3039 2037 3039 390d 0a31
    ...9..109.7099..1
    0x0050: 3130 2035 3133 3232 0d0a 3131 3120 3131
    10.51322..111.11
    16:12:52.063203 IP (tos 0x0, ttl 42, id 5654, offset 0, flags [DF],
    proto 6, length: 52) 221.228.x.x.21838 > mailhost.pop3: . [tcp sum ok]
    44:44(0) ack 2759 win 10136
    0x0000: 000c f1d1 8c7e 0010 db7e 6ec5 0800 4500
    ......~...~n...E.
    0x0010: 0034 1616 4000 2a06 ec88 dded a589 c0a8
    ..4..@.*.........
    0x0020: 0a06 554e 006e 987c cba1 f8a9 ef2c 8010
    ...UN.n.|.....,..
    0x0030: 2798 3d80 0000 0101 080a 00df de12 9396
    '.=.............
    0x0040: af45 .E
    16:12:52.063340 IP (tos 0x0, ttl 64, id 20346, offset 0, flags [DF],
    proto 6, length: 1500) mailhost.pop3 > 221.228.x.x.21838: .
    2759:4207(1448) ack 44 win 1448
    0x0000: 0010 db7e 6ec5 000c f1d1 8c7e 0800 4500
    ....~n......~..E.
    0x0010: 05dc 4f7a 4000 4006 977c c0a8 0a06 dded
    ...Oz@.@..|......
    0x0020: a589 006e 554e f8a9 ef2c 987c cba1 8010
    ....nUN...,.|....
    0x0030: 05a8 53f4 0000 0101 080a 9396 b026 00df
    ...S..........&..
    0x0040: de12 0a32 3532 2033 3932 370d 0a32 3533
    ....252.3927..253
    0x0050: 2032 3037 370d 0a32 3534 2037 3435 330d
    ..2077..254.7453.
    16:12:52.063349 IP (tos 0x0, ttl 64, id 20348, offset 0, flags [DF],
    proto 6, length: 1500) mailhost.pop3 > 221.228.x.x.21838: .
    4207:5655(1448) ack 44 win 1448
    0x0000: 0010 db7e 6ec5 000c f1d1 8c7e 0800 4500
    ....~n......~..E.
    0x0010: 05dc 4f7c 4000 4006 977a c0a8 0a06 dded
    ...O|@.@..z......
    0x0020: a589 006e 554e f8a9 f4d4 987c cba1 8010
    ....nUN.....|....
    0x0030: 05a8 53f4 0000 0101 080a 9396 b026 00df
    ...S..........&..
    0x0040: de12 0d0a 3339 3620 3133 3533 340d 0a33
    .....396.13534..3
    0x0050: 3937 2031 3335 320d 0a33 3938 2035 3633
    97.1352..398.563
    16:12:52.063356 IP (tos 0x0, ttl 64, id 20350, offset 0, flags [DF],
    proto 6, length: 141) mailhost.pop3 > 221.228.x.x.21838: P
    5655:5744(89) ack 44 win 1448
    0x0000: 0010 db7e 6ec5 000c f1d1 8c7e 0800 4500
    ....~n......~..E.
    0x0010: 008d 4f7e 4000 4006 9cc7 c0a8 0a06 dded
    ...O~@.@.........
    0x0020: a589 006e 554e f8a9 fa7c 987c cba1 8018
    ....nUN...|.|....
    0x0030: 05a8 4ea5 0000 0101 080a 9396 b026 00df
    ...N..........&..
    0x0040: de12 3136 3635 0d0a 3534 3020 3130 3339
    ...1665..540.1039
    0x0050: 330d 0a35 3431 2032 3336 310d 0a35 3432
    3..541.2361..542
    16:12:52.291438 IP (tos 0x0, ttl 42, id 5655, offset 0, flags [DF],
    proto 6, length: 52) 221.228.x.x.21838 > mailhost.pop3: . [tcp sum ok]
    44:44(0) ack 5655 win 15928
    0x0000: 000c f1d1 8c7e 0010 db7e 6ec5 0800 4500
    ......~...~n...E.
    0x0010: 0034 1617 4000 2a06 ec87 dded a589 c0a8
    ..4..@.*.........
    0x0020: 0a06 554e 006e 987c cba1 f8a9 fa7c 8010
    ...UN.n.|.....|..
    0x0030: 3e38 1a98 0000 0101 080a 00df de29 9396
    >8...........)..

    0x0040: b026 .&
    16:12:52.291690 IP (tos 0x0, ttl 42, id 5656, offset 0, flags [DF],
    proto 6, length: 58) 221.228.x.x.21838 > mailhost.pop3: P [tcp sum ok]
    44:50(6) ack 5744 win 15928
    0x0000: 000c f1d1 8c7e 0010 db7e 6ec5 0800 4500
    ......~...~n...E.
    0x0010: 003a 1618 4000 2a06 ec80 dded a589 c0a8
    ..:..@.*.........
    0x0020: 0a06 554e 006e 987c cba1 f8a9 fad5 8018
    ...UN.n.|........
    0x0030: 3e38 7391 0000 0101 080a 00df de29 9396
    >8s..........)..

    0x0040: b026 5549 444c 0d0a .&UIDL..
    16:12:52.291880 IP (tos 0x0, ttl 64, id 20352, offset 0, flags [DF],
    proto 6, length: 1076) mailhost.pop3 > 221.228.x.x.21838: P
    5744:6768(1024) ack 50 win 1448
    0x0000: 0010 db7e 6ec5 000c f1d1 8c7e 0800 4500
    ....~n......~..E.
    0x0010: 0434 4f80 4000 4006 991e c0a8 0a06 dded
    ..4O.@.@.........
    0x0020: a589 006e 554e f8a9 fad5 987c cba7 8018
    ....nUN.....|....
    0x0030: 05a8 524c 0000 0101 080a 9396 b10a 00df
    ...RL............
    0x0040: de29 2b4f 4b20 556e 6971 7565 2d49 4420
    ..)+OK.Unique-ID.
    0x0050: 6c69 7374 696e 6720 666f 6c6c 6f77 730d
    listing.follows.
    16:12:52.292035 IP (tos 0x0, ttl 64, id 20354, offset 0, flags [DF],
    proto 6, length: 1500) mailhost.pop3 > 221.228.x.x.21838: .
    6768:8216(1448) ack 50 win 1448
    0x0000: 0010 db7e 6ec5 000c f1d1 8c7e 0800 4500
    ....~n......~..E.
    0x0010: 05dc 4f82 4000 4006 9774 c0a8 0a06 dded
    ...O.@.@..t......
    0x0020: a589 006e 554e f8a9 fed5 987c cba7 8010
    ....nUN.....|....
    0x0030: 05a8 53f4 0000 0101 080a 9396 b10a 00df
    ...S.............
    0x0040: de29 3030 3330 0d0a 3439 2034 3437 3738
    ..)0030..49.44778
    0x0050: 3835 6330 3030 3030 3033 310d 0a35 3020
    85c00000031..50.
    16:12:52.292158 IP (tos 0x0, ttl 64, id 20356, offset 0, flags [DF],
    proto 6, length: 1500) mailhost.pop3 > 221.228.x.x.21838: .
    8216:9664(1448) ack 50 win 1448
    0x0000: 0010 db7e 6ec5 000c f1d1 8c7e 0800 4500
    ....~n......~..E.
    0x0010: 05dc 4f84 4000 4006 9772 c0a8 0a06 dded
    ...O.@.@..r......
    0x0020: a589 006e 554e f8aa 047d 987c cba7 8010
    ....nUN...}.|....
    0x0030: 05a8 53f4 0000 0101 080a 9396 b10a 00df
    ...S.............
    0x0040: de29 340d 0a31 .x 2034 3437 3738 3835
    ..)4..117.4477885
    0x0050: 6330 3030 3030 3037 350d 0a31 3138 2034
    c00000075..118.4
    16:12:52.292316 IP (tos 0x0, ttl 64, id 20358, offset 0, flags [DF],
    proto 6, length: 1500) mailhost.pop3 > 221.228.x.x.21838: .
    9664:11112(1448) ack 50 win 1448 14671401>
    0x0000: 0010 db7e 6ec5 000c f1d1 8c7e 0800 4500
    ....~n......~..E.
    0x0010: 05dc 4f86 4000 4006 9770 c0a8 0a06 dded
    ...O.@.@..p......
    0x0020: a589 006e 554e f8aa 0a25 987c cba7 8010
    ....nUN...%.|....
    0x0030: 05a8 53f4 0000 0101 080a 9396 b10b 00df
    ...S.............
    0x0040: de29 3030 3062 360d 0a31 3833 2034 3437
    ..)000b6..183.447
    0x0050: 3738 3835 6330 3030 3030 3062 370d 0a31
    7885c000000b7..1
    16:12:52.516306 IP (tos 0x0, ttl 42, id 5657, offset 0, flags [DF],
    proto 6, length: 52) 221.228.x.x.21838 > mailhost.pop3: . [tcp sum ok]
    50:50(0) ack 8216 win 21720
    0x0000: 000c f1d1 8c7e 0010 db7e 6ec5 0800 4500
    ......~...~n...E.
    0x0010: 0034 1619 4000 2a06 ec85 dded a589 c0a8
    ..4..@.*.........
    0x0020: 0a06 554e 006e 987c cba7 f8aa 047d 8010
    ...UN.n.|.....}..
    0x0030: 54d8 f8f6 0000 0101 080a 00df de3f 9396
    T............?..
    0x0040: b10a ..
    16:12:52.516506 IP (tos 0x0, ttl 64, id 20360, offset 0, flags [DF],
    proto 6, length: 1500) mailhost.pop3 > 221.228.x.x.21838: .
    11112:12560(1448) ack 50 win 1448 14671423>
    0x0000: 0010 db7e 6ec5 000c f1d1 8c7e 0800 4500
    ....~n......~..E.
    0x0010: 05dc 4f88 4000 4006 976e c0a8 0a06 dded
    ...O.@.@..n......
    0x0020: a589 006e 554e f8aa 0fcd 987c cba7 8010
    ....nUN.....|....
    0x0030: 05a8 53f4 0000 0101 080a 9396 b1eb 00df
    ...S.............
    0x0040: de3f 6330 3030 3030 3066 380d 0a32 3439
    ..?c000000f8..249
    0x0050: 2034 3437 3738 3835 6330 3030 3030 3066
    ..4477885c000000f
    16:12:52.516511 IP (tos 0x0, ttl 64, id 20360, offset 0, flags [DF],
    proto 6, length: 1500) mailhost.pop3 > 221.228.x.x.21838: .
    11112:12560(1448) ack 50 win 1448 14671423>
    0x0000: 0010 db7e 6ec5 000c f1d1 8c7e 0800 4500
    ....~n......~..E.
    0x0010: 05dc 4f88 4000 4006 976e c0a8 0a06 dded
    ...O.@.@..n......
    0x0020: a589 006e 554e f8aa 0fcd 987c cba7 8010
    ....nUN.....|....
    0x0030: 05a8 53f4 0000 0101 080a 9396 b1eb 00df
    ...S.............
    0x0040: de3f 6330 3030 3030 3066 380d 0a32 3439
    ..?c000000f8..249
    0x0050: 2034 3437 3738 3835 6330 3030 3030 3066
    ..4477885c000000f
    16:12:52.516517 IP (tos 0x0, ttl 64, id 20362, offset 0, flags [DF],
    proto 6, length: 1500) mailhost.pop3 > 221.228.x.x.21838: .
    12560:14008(1448) ack 50 win 1448 14671423>
    0x0000: 0010 db7e 6ec5 000c f1d1 8c7e 0800 4500
    ....~n......~..E.
    0x0010: 05dc 4f8a 4000 4006 976c c0a8 0a06 dded
    ...O.@.@..l......
    0x0020: a589 006e 554e f8aa 1575 987c cba7 8010
    ....nUN...u.|....
    0x0030: 05a8 53f4 0000 0101 080a 9396 b1eb 00df
    ...S.............
    0x0040: de3f 3738 3835 6330 3030 3030 3133 610d
    ..?7885c0000013a.
    0x0050: 0a33 3135 2034 3437 3738 3835 6330 3030
    ..315.4477885c000
    16:12:52.516525 IP (tos 0x0, ttl 64, id 20364, offset 0, flags [DF],
    proto 6, length: 1500) mailhost.pop3 > 221.228.x.x.21838: .
    14008:15456(1448) ack 50 win 1448 14671423>
    0x0000: 0010 db7e 6ec5 000c f1d1 8c7e 0800 4500
    ....~n......~..E.
    0x0010: 05dc 4f8c 4000 4006 976a c0a8 0a06 dded
    ...O.@.@..j......
    0x0020: a589 006e 554e f8aa 1b1d 987c cba7 8010
    ....nUN.....|....
    0x0030: 05a8 53f4 0000 0101 080a 9396 b1eb 00df
    ...S.............
    0x0040: de3f 2034 3437 3738 3835 6330 3030 3030
    ..?.4477885c00000
    0x0050: .x 630d 0a33 3831 2034 3437 3738 3835
    17c..381.4477885
    16:12:52.532540 IP (tos 0x0, ttl 42, id 5658, offset 0, flags [DF],
    proto 6, length: 52) 221.228.x.x.21838 > mailhost.pop3: . [tcp sum ok]
    50:50(0) ack 11112 win 27512
    0x0000: 000c f1d1 8c7e 0010 db7e 6ec5 0800 4500
    ......~...~n...E.
    0x0010: 0034 161a 4000 2a06 ec84 dded a589 c0a8
    ..4..@.*.........
    0x0020: 0a06 554e 006e 987c cba7 f8aa 0fcd 8010
    ...UN.n.|........
    0x0030: 6b78 d704 0000 0101 080a 00df de41 9396
    kx...........A..
    0x0040: b10a ..
    16:12:52.532665 IP (tos 0x0, ttl 64, id 20366, offset 0, flags [DF],
    proto 6, length: 1500) mailhost.pop3 > 221.228.x.x.21838: .
    15456:16904(1448) ack 50 win 1448 14671425>
    0x0000: 0010 db7e 6ec5 000c f1d1 8c7e 0800 4500
    ....~n......~..E.
    0x0010: 05dc 4f8e 4000 4006 9768 c0a8 0a06 dded
    ...O.@.@..h......
    0x0020: a589 006e 554e f8aa 20c5 987c cba7 8010
    ....nUN.....|....
    0x0030: 05a8 53f4 0000 0101 080a 9396 b1fb 00df
    ...S.............
    0x0040: de41 0a34 3436 2034 3437 3738 3835 6330
    ..A.446.4477885c0
    0x0050: 3030 3030 3162 650d 0a34 3437 2034 3437
    00001be..447.447
    16:12:52.532675 IP (tos 0x0, ttl 64, id 20368, offset 0, flags [DF],
    proto 6, length: 852) mailhost.pop3 > 221.228.x.x.21838: P
    16904:17704(800) ack 50 win 1448 14671425>
    0x0000: 0010 db7e 6ec5 000c f1d1 8c7e 0800 4500
    ....~n......~..E.
    0x0010: 0354 4f90 4000 4006 99ee c0a8 0a06 dded
    ..TO.@.@.........
    0x0020: a589 006e 554e f8aa 266d 987c cba7 8018
    ....nUN..&m.|....
    0x0030: 05a8 516c 0000 0101 080a 9396 b1fb 00df
    ...Ql............
    0x0040: de41 3166 660d 0a35 3132 2034 3437 3738
    ..A1ff..512.44778
    0x0050: 3835 6330 3030 3030 3230 300d 0a35 3133
    85c00000200..513
    16:12:52.743665 IP (tos 0x0, ttl 42, id 5659, offset 0, flags [DF],
    proto 6, length: 52) 221.228.x.x.21838 > mailhost.pop3: . [tcp sum ok]
    50:50(0) ack 14008 win 33304
    0x0000: 000c f1d1 8c7e 0010 db7e 6ec5 0800 4500
    ......~...~n...E.
    0x0010: 0034 161b 4000 2a06 ec83 dded a589 c0a8
    ..4..@.*.........
    0x0020: 0a06 554e 006e 987c cba7 f8aa 1b1d 8010
    ...UN.n.|........
    0x0030: 8218 b41e 0000 0101 080a 00df de56 9396
    ..............V..
    0x0040: b1eb ..
    16:12:52.759152 IP (tos 0x0, ttl 42, id 5660, offset 0, flags [DF],
    proto 6, length: 52) 221.228.x.x.21838 > mailhost.pop3: . [tcp sum ok]
    50:50(0) ack 16904 win 39096
    0x0000: 000c f1d1 8c7e 0010 db7e 6ec5 0800 4500
    ......~...~n...E.
    0x0010: 0034 161c 4000 2a06 ec82 dded a589 c0a8
    ..4..@.*.........
    0x0020: 0a06 554e 006e 987c cba7 f8aa 266d 8010
    ...UN.n.|....&m..
    0x0030: 98b8 922c 0000 0101 080a 00df de58 9396
    ....,.........X..
    0x0040: b1eb ..
    16:12:52.797004 IP (tos 0x0, ttl 42, id 5661, offset 0, flags [DF],
    proto 6, length: 52) 221.228.x.x.21838 > mailhost.pop3: . [tcp sum ok]
    50:50(0) ack 17704 win 39096
    0x0000: 000c f1d1 8c7e 0010 db7e 6ec5 0800 4500
    ......~...~n...E.
    0x0010: 0034 161d 4000 2a06 ec81 dded a589 c0a8
    ..4..@.*.........
    0x0020: 0a06 554e 006e 987c cba7 f8aa 298d 8010
    ...UN.n.|....)...
    0x0030: 98b8 8ef8 0000 0101 080a 00df de5c 9396
    ..............\..
    0x0040: b1fb ..
    16:12:53.216253 IP (tos 0x0, ttl 42, id 5662, offset 0, flags [DF],
    proto 6, length: 61) 221.228.x.x.21838 > mailhost.pop3: P [tcp sum ok]
    50:59(9) ack 17704 win 39096
    0x0000: 000c f1d1 8c7e 0010 db7e 6ec5 0800 4500
    ......~...~n...E.
    0x0010: 003d 161e 4000 2a06 ec77 dded a589 c0a8
    ..=..@.*..w......
    0x0020: 0a06 554e 006e 987c cba7 f8aa 298d 8018
    ...UN.n.|....)...
    0x0030: 98b8 8ce3 0000 0101 080a 00df de85 9396
    .................
    0x0040: b1fb 5245 5452 2036 310d 0a ..RETR.61..
    16:12:53.216587 IP (tos 0x0, ttl 64, id 20370, offset 0, flags [DF],
    proto 6, length: 1076) mailhost.pop3 > 221.228.x.x.21838: P
    17704:18728(1024) ack 59 win 1448 14671493>
    0x0000: 0010 db7e 6ec5 000c f1d1 8c7e 0800 4500
    ....~n......~..E.
    0x0010: 0434 4f92 4000 4006 990c c0a8 0a06 dded
    ..4O.@.@.........
    0x0020: a589 006e 554e f8aa 298d 987c cbb0 8018
    ....nUN..)..|....
    0x0030: 05a8 524c 0000 0101 080a 9396 b4a7 00df
    ...RL............
    0x0040: de85 2b4f 4b20 3638 3036 3320 6f63 7465
    ...+OK.68063.octe
    0x0050: 7473 0d0a 5265 7475 726e 2d50 6174 683a
    ts..Return-Path:
    16:12:53.217251 IP (tos 0x0, ttl 64, id 20372, offset 0, flags [DF],
    proto 6, length: 1500) mailhost.pop3 > 221.228.x.x.21838: .
    18728:20176(1448) ack 59 win 1448 14671493>
    0x0000: 0010 db7e 6ec5 000c f1d1 8c7e 0800 4500
    ....~n......~..E.
    0x0010: 05dc 4f94 4000 4006 9762 c0a8 0a06 dded
    ...O.@.@..b......
    0x0020: a589 006e 554e f8aa 2d8d 987c cbb0 8010
    ....nUN..-..|....
    0x0030: 05a8 53f4 0000 0101 080a 9396 b4a8 00df
    ...S.............
    0x0040: de85 2028 2920 4157 4c2c 4854 4d4c 5f39
    ....().AWL,HTML_9
    0x0050: 305f 3130 302c 4854 4d4c 5f4d 4553 5341
    0_100,HTML_MESSA
    16:12:53.217321 IP (tos 0x0, ttl 64, id 20374, offset 0, flags [DF],
    proto 6, length: 1500) mailhost.pop3 > 221.228.x.x.21838: .
    20176:21624(1448) ack 59 win 1448 14671493>
    0x0000: 0010 db7e 6ec5 000c f1d1 8c7e 0800 4500
    ....~n......~..E.
    0x0010: 05dc 4f96 4000 4006 9760 c0a8 0a06 dded
    ...O.@.@..`......
    0x0020: a589 006e 554e f8aa 3335 987c cbb0 8010
    ....nUN..35.|....
    0x0030: 05a8 53f4 0000 0101 080a 9396 b4a8 00df
    ...S.............
    0x0040: de85 6564 7563 7469 6f6e 2074 6172 6765
    ...eduction.targe
    0x0050: 7420 6973 2073 6574 2074 6f20 3330 2520
    t.is.set.to.30%.
    16:12:53.417380 IP (tos 0x0, ttl 50, id 129, offset 0, flags [DF],
    proto 6, length: 40) 221.228.x.x.21838 > mailhost.pop3: R [tcp sum ok]
    2558315440:2558315440(0) win 0
    0x0000: 000c f1d1 8c7e 0010 db7e 6ec5 0800 4500
    ......~...~n...E.
    0x0010: 0028 0081 4000 3206 fa29 dded a589 c0a8
    ..(..@.2..)......
    0x0020: 0a06 554e 006e 987c cbb0 987c cb76 5004
    ...UN.n.|...|.vP.
    0x0030: 0000 43de 0000 0000 0000 0000 ..C.........
    16:12:53.417752 IP (tos 0x0, ttl 50, id 129, offset 0, flags [DF],
    proto 6, length: 40) 221.228.x.x.21838 > mailhost.pop3: R [tcp sum ok]
    2558319820:2558319820(0) win 0
    0x0000: 000c f1d1 8c7e 0010 db7e 6ec5 0800 4500
    ......~...~n...E.
    0x0010: 0028 0081 4000 3206 fa29 dded a589 c0a8
    ..(..@.2..)......
    0x0020: 0a06 554e 006e 987c dccc 987c cb76 5004
    ...UN.n.|...|.vP.
    0x0030: 0000 32c2 0000 0000 0000 0000 ..2.........
    16:12:53.418011 IP (tos 0x0, ttl 50, id 129, offset 0, flags [DF],
    proto 6, length: 40) 221.228.x.x.21838 > mailhost.pop3: R [tcp sum ok]
    2558316900:2558316900(0) win 0
    0x0000: 000c f1d1 8c7e 0010 db7e 6ec5 0800 4500
    ......~...~n...E.
    0x0010: 0028 0081 4000 3206 fa29 dded a589 c0a8
    ..(..@.2..)......
    0x0020: 0a06 554e 006e 987c d164 987c cb76 5004
    ...UN.n.|.d.|.vP.
    0x0030: 0000 3e2a 0000 0000 0000 0000 ..>*........
    16:12:53.428993 IP (tos 0x0, ttl 50, id 129, offset 0, flags [DF],
    proto 6, length: 40) 221.228.x.x.21838 > mailhost.pop3: R [tcp sum ok]
    2558315440:2558315440(0) win 0
    0x0000: 000c f1d1 8c7e 0010 db7e 6ec5 0800 4500
    ......~...~n...E.
    0x0010: 0028 0081 4000 3206 fa29 dded a589 c0a8
    ..(..@.2..)......
    0x0020: 0a06 554e 006e 987c cbb0 f8aa 3335 5004
    ...UN.n.|....35P.
    0x0030: 0000 7bf1 0000 0000 0000 0000 ..{.........
    16:12:53.431116 IP (tos 0x0, ttl 50, id 129, offset 0, flags [DF],
    proto 6, length: 40) 221.228.x.x.21838 > mailhost.pop3: R [tcp sum ok]
    2558315440:2558315440(0) win 0
    0x0000: 000c f1d1 8c7e 0010 db7e 6ec5 0800 4500
    ......~...~n...E.
    0x0010: 0028 0081 4000 3206 fa29 dded a589 c0a8
    ..(..@.2..)......
    0x0020: 0a06 554e 006e 987c cbb0 f8aa 38dd 5004
    ...UN.n.|....8.P.
    0x0030: 0000 7649 0000 0000 0000 0000 ..vI........
    16:12:53.432490 IP (tos 0x0, ttl 42, id 5663, offset 0, flags [DF],
    proto 6, length: 52) 221.228.x.x.21838 > mailhost.pop3: . [tcp sum ok]
    59:59(0) ack 18728 win 39096
    0x0000: 000c f1d1 8c7e 0010 db7e 6ec5 0800 4500
    ......~...~n...E.
    0x0010: 0034 161f 4000 2a06 ec7f dded a589 c0a8
    ..4..@.*.........
    0x0020: 0a06 554e 006e 987c cbb0 f8aa 2d8d 8010
    ...UN.n.|....-...
    0x0030: 98b8 8804 0000 0101 080a 00df de9b 9396
    .................
    0x0040: b4a7 ..
    16:12:53.432505 IP (tos 0x0, ttl 64, id 8260, offset 0, flags [DF],
    proto 6, length: 40) mailhost.pop3 > 221.228.x.x.21838: R [tcp sum ok]
    4171902349:4171902349(0) win 0
    0x0000: 0010 db7e 6ec5 000c f1d1 8c7e 0800 4500
    ....~n......~..E.
    0x0010: 0028 2044 4000 4006 cc66 c0a8 0a06 dded
    ..(.D@.@..f......
    0x0020: a589 006e 554e f8aa 2d8d 0000 0000 5004
    ....nUN..-.....P.
    0x0030: 0000 e5c6 0000 ......
    16:12:53.441735 IP (tos 0x0, ttl 42, id 5664, offset 0, flags [DF],
    proto 6, length: 52) 221.228.x.x.21838 > mailhost.pop3: . [tcp sum ok]
    59:59(0) ack 20176 win 41992
    0x0000: 000c f1d1 8c7e 0010 db7e 6ec5 0800 4500
    ......~...~n...E.
    0x0010: 0034 1620 4000 2a06 ec7e dded a589 c0a8
    ..4..@.*..~......
    0x0020: 0a06 554e 006e 987c cbb0 f8aa 3335 8010
    ...UN.n.|....35..
    0x0030: a408 770a 0000 0101 080a 00df de9c 9396
    ...w.............
    0x0040: b4a8 ..
    16:12:53.441747 IP (tos 0x0, ttl 64, id 8261, offset 0, flags [DF],
    proto 6, length: 40) mailhost.pop3 > 221.228.x.x.21838: R [tcp sum ok]
    4171903797:4171903797(0) win 0
    0x0000: 0010 db7e 6ec5 000c f1d1 8c7e 0800 4500
    ....~n......~..E.
    0x0010: 0028 2045 4000 4006 cc65 c0a8 0a06 dded
    ..(.E@.@..e......
    0x0020: a589 006e 554e f8aa 3335 0000 0000 5004
    ....nUN..35....P.
    0x0030: 0000 e01e 0000 ......
    16:12:53.449605 IP (tos 0x0, ttl 42, id 5665, offset 0, flags [DF],
    proto 6, length: 52) 221.228.x.x.21838 > mailhost.pop3: . [tcp sum ok]
    59:59(0) ack 21624 win 44888
    0x0000: 000c f1d1 8c7e 0010 db7e 6ec5 0800 4500
    ......~...~n...E.
    0x0010: 0034 1621 4000 2a06 ec7d dded a589 c0a8
    ..4.!@.*..}......
    0x0020: 0a06 554e 006e 987c cbb0 f8aa 38dd 8010
    ...UN.n.|....8...
    0x0030: af58 6611 0000 0101 080a 00df de9d 9396
    ..Xf.............
    0x0040: b4a8 ..
    16:12:53.449617 IP (tos 0x0, ttl 64, id 8262, offset 0, flags [DF],
    proto 6, length: 40) mailhost.pop3 > 221.228.x.x.21838: R [tcp sum ok]
    4171905245:4171905245(0) win 0
    0x0000: 0010 db7e 6ec5 000c f1d1 8c7e 0800 4500
    ....~n......~..E.
    0x0010: 0028 2046 4000 4006 cc64 c0a8 0a06 dded
    ..(.F@.@..d......
    0x0020: a589 006e 554e f8aa 38dd 0000 0000 5004
    ....nUN..8.....P.
    0x0030: 0000 da76 0000 ...v..



    This connection works 10% of the time and fails all the other time.

    Once I get connection reset by peer message. I cannot connect to pop
    server for a while. If I try after 10-15min It will connect and login
    and connection resets while trying to download a message.

    I would appreciate your help.

    _Venkat


  2. Re: I get connection reset by peer for a pop3 connection from our remote site only

    In article <1148686827.505402.242110@u72g2000cwu.googlegroups. com>,
    "chalukya" wrote:

    > This connection works 10% of the time and fails all the other time.
    >
    > Once I get connection reset by peer message. I cannot connect to pop
    > server for a while. If I try after 10-15min It will connect and login
    > and connection resets while trying to download a message.
    >
    > I would appreciate your help.


    I didn't see the server doing anything wrong. When the client asks to
    retrieve message 61, the server sends it, and then the client sends a
    RST segment that kills the connection, for no discernable reason.

    Are you running any software on the client that scans incoming mail for
    viruses, spam, etc. It might be interfering with this, see if turning
    it off helps.

    --
    Barry Margolin, barmar@alum.mit.edu
    Arlington, MA
    *** PLEASE post questions in newsgroups, not directly to me ***
    *** PLEASE don't copy me on replies, I'll read them in the group ***

  3. Re: I get connection reset by peer for a pop3 connection from our remote site only

    Hi Barry,
    I apologize, my first reply I sent to your address. I also noticed, I
    dont have problem retrieving these messages when I copy the mailbox to
    pop server on a local machine at remote side. I would suspect DSL
    router is doing something wrong, but this does not happen to ssh
    connection.

    Thanks

    Barry Margolin wrote:
    > In article <1148686827.505402.242110@u72g2000cwu.googlegroups. com>,
    > "chalukya" wrote:
    >
    > > This connection works 10% of the time and fails all the other time.
    > >
    > > Once I get connection reset by peer message. I cannot connect to pop
    > > server for a while. If I try after 10-15min It will connect and login
    > > and connection resets while trying to download a message.
    > >
    > > I would appreciate your help.

    >
    > I didn't see the server doing anything wrong. When the client asks to
    > retrieve message 61, the server sends it, and then the client sends a
    > RST segment that kills the connection, for no discernable reason.
    >
    > Are you running any software on the client that scans incoming mail for
    > viruses, spam, etc. It might be interfering with this, see if turning
    > it off helps.
    >
    > --
    > Barry Margolin, barmar@alum.mit.edu
    > Arlington, MA
    > *** PLEASE post questions in newsgroups, not directly to me ***
    > *** PLEASE don't copy me on replies, I'll read them in the group ***



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