I had everything working just fine. I have no clue what I broke, but in
any event. Whenever a user sends mail,(from a WinXX box, or even the
Linux server itself), it times out on the 'waiting for reply' message.
For example, below are the tcpdump outputs when I clicked 'send' on a
Win95 box running Netscape 4.51. The little status window popped up
saying "message sent", "waiting for reply", and then after about
60seconds, it times out with an error saying "connection terminated on
the remote end". I'm still connected to the ISP tho. Browsing has always
worked from any workstation. Just outgoing email quit.
Any ideas?
(I have: Redhat 5.2, kernel 2.2.5, ppp-2.3.6-2, diald-0.98-3,
sendmail-8.9.3, ipchains-1.38-?)
TCPDUMP output from when I clicked 'send':
14:40:37.945473 pm8-198.accnorwalk.com.61010 > mail.accnorwalk.com.smtp:
S 42934:42934(0) win 8192 <mss 1460> (DF) [tos 0x10]
14:40:38.072318 mail.accnorwalk.com.smtp > pm8-198.accnorwalk.com.61010:
S 1237378796:1237378796(0) ack 42935 win 8760 <mss 1460> (DF)
14:40:38.072826 pm8-198.accnorwalk.com.61010 > mail.accnorwalk.com.smtp:
. ack 1 win 8760 (DF) [tos 0x10]
14:40:38.282323 mail.accnorwalk.com.smtp > pm8-198.accnorwalk.com.61010:
P 1:138(137) ack 1 win 8760 (DF)
14:40:38.283188 pm8-198.accnorwalk.com.61010 > mail.accnorwalk.com.smtp:
P 1:22(21) ack 138 win 8623 (DF) [tos 0x10]
14:40:38.432331 mail.accnorwalk.com.smtp > pm8-198.accnorwalk.com.61010:
P 138:237(99) ack 22 win 8739 (DF)
14:40:38.433234 pm8-198.accnorwalk.com.61010 > mail.accnorwalk.com.smtp:
P 22:55(33) ack 237 win 8524 (DF) [tos 0x10]
14:40:38.562332 mail.accnorwalk.com.smtp > pm8-198.accnorwalk.com.61010:
P 237:274(37) ack 55 win 8706 (DF)
14:40:38.563051 pm8-198.accnorwalk.com.61010 > mail.accnorwalk.com.smtp:
P 55:83(28) ack 274 win 8487 (DF) [tos 0x10]
14:40:38.682334 mail.accnorwalk.com.smtp > pm8-198.accnorwalk.com.61010:
P 274:311(37) ack 83 win 8678 (DF)
14:40:38.683093 pm8-198.accnorwalk.com.61010 > mail.accnorwalk.com.smtp:
P 83:106(23) ack 311 win 8450 (DF) [tos 0x10]
14:40:38.802328 mail.accnorwalk.com.smtp > pm8-198.accnorwalk.com.61010:
P 311:343(32) ack 106 win 8655 (DF)
14:40:38.803166 pm8-198.accnorwalk.com.61010 > mail.accnorwalk.com.smtp:
P 106:112(6) ack 343 win 8418 (DF) [tos 0x10]
14:40:38.922332 mail.accnorwalk.com.smtp > pm8-198.accnorwalk.com.61010:
P 343:387(44) ack 112 win 8649 (DF)
14:40:38.928103 pm8-198.accnorwalk.com.61010 > mail.accnorwalk.com.smtp:
. 112:1572(1460) ack 387 win 8374 (DF) [tos 0x10]
14:40:38.928494 pm8-198.accnorwalk.com.61010 > mail.accnorwalk.com.smtp:
P 1572:2084(512) ack 387 win 8374 (DF) [tos 0x10]
14:40:40.116447 pm8-198.accnorwalk.com.61010 > mail.accnorwalk.com.smtp:
. 112:1572(1460) ack 387 win 8374 (DF) [tos 0x10]
14:40:40.872318 mail.accnorwalk.com.smtp > pm8-198.accnorwalk.com.61010:
P 343:387(44) ack 112 win 8649 (DF)
14:40:40.872831 pm8-198.accnorwalk.com.61010 > mail.accnorwalk.com.smtp:
. ack 387 win 8374 (DF) [tos 0x10]
14:40:42.520419 pm8-198.accnorwalk.com.61010 > mail.accnorwalk.com.smtp:
. 112:1572(1460) ack 387 win 8374 (DF) [tos 0x10]
14:40:44.812316 mail.accnorwalk.com.smtp > pm8-198.accnorwalk.com.61010:
P 343:387(44) ack 112 win 8649 (DF)
14:40:44.812814 pm8-198.accnorwalk.com.61010 > mail.accnorwalk.com.smtp:
. ack 387 win 8374 (DF) [tos 0x10]
14:40:47.328345 pm8-198.accnorwalk.com.61010 > mail.accnorwalk.com.smtp:
. 112:1572(1460) ack 387 win 8374 (DF) [tos 0x10]
14:40:52.682325 mail.accnorwalk.com.smtp > pm8-198.accnorwalk.com.61010:
P 343:387(44) ack 112 win 8649 (DF)
14:40:52.682836 pm8-198.accnorwalk.com.61010 > mail.accnorwalk.com.smtp:
. ack 387 win 8374 (DF) [tos 0x10]
14:40:52.817191 pm8-198.accnorwalk.com.61011 >
mail.accnorwalk.com.pop-3: S 42936:42936(0) win 8192 <mss 1460> (DF)
[tos 0x10]
14:40:52.942313 mail.accnorwalk.com.pop-3 >
pm8-198.accnorwalk.com.61011: S 1237393671:1237393671(0) ack 42937 win
8760 <mss 1460> (DF)
14:40:52.942799 pm8-198.accnorwalk.com.61011 >
mail.accnorwalk.com.pop-3: . ack 1 win 8760 (DF) [tos 0x10]
14:40:53.152324 mail.accnorwalk.com.pop-3 >
pm8-198.accnorwalk.com.61011: P 1:159(158) ack 1 win 8760 (DF)
14:40:53.153214 pm8-198.accnorwalk.com.61011 >
mail.accnorwalk.com.pop-3: P 1:13(12) ack 159 win 8602 (DF) [tos 0x10]
14:40:53.272323 mail.accnorwalk.com.pop-3 >
pm8-198.accnorwalk.com.61011: P 159:192(33) ack 13 win 8748 (DF)
14:40:53.273078 pm8-198.accnorwalk.com.61011 >
mail.accnorwalk.com.pop-3: P 13:28(15) ack 192 win 8569 (DF) [tos 0x10]
14:40:53.402327 mail.accnorwalk.com.pop-3 >
pm8-198.accnorwalk.com.61011: P 192:235(43) ack 28 win 8733 (DF)
14:40:53.403003 pm8-198.accnorwalk.com.61011 >
mail.accnorwalk.com.pop-3: P 28:34(6) ack 235 win 8526 (DF) [tos 0x10]
14:40:53.512323 mail.accnorwalk.com.pop-3 >
pm8-198.accnorwalk.com.61011: P 235:247(12) ack 34 win 8727 (DF)
14:40:53.517251 pm8-198.accnorwalk.com.61011 >
mail.accnorwalk.com.pop-3: P 34:40(6) ack 247 win 8514 (DF) [tos 0x10]
14:40:53.622334 mail.accnorwalk.com.pop-3 >
pm8-198.accnorwalk.com.61011: P 247:263(16) ack 40 win 8721 (DF)
14:40:53.623005 pm8-198.accnorwalk.com.61011 >
mail.accnorwalk.com.pop-3: P 40:46(6) ack 263 win 8498 (DF) [tos 0x10]
14:40:53.752321 mail.accnorwalk.com.pop-3 >
pm8-198.accnorwalk.com.61011: P 263:319(56) ack 46 win 8715 (DF)
14:40:53.753388 pm8-198.accnorwalk.com.61011 >
mail.accnorwalk.com.pop-3: P 46:54(8) ack 319 win 8442 (DF) [tos 0x10]
14:40:53.862325 mail.accnorwalk.com.pop-3 >
pm8-198.accnorwalk.com.61011: P 319:336(17) ack 54 win 8707 (DF)
14:40:54.038141 pm8-198.accnorwalk.com.61011 >
mail.accnorwalk.com.pop-3: . ack 336 win 8425 (DF) [tos 0x10]
14:40:54.392365 mail.accnorwalk.com.pop-3 >
pm8-198.accnorwalk.com.61011: . 336:1796(1460) ack 54 win 8707 (DF)
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