Re: Serious Postfix weirdness

["Sepherosa Ziehau" <sepherosa@xxxxxxxxx>]

On Sat, Nov 15, 2008 at 6:17 PM, Petr Janda
<elekktretterr@exemail.com.au> wrote:
>> window scaling shift 0 is allowed.  It just mean we support window
>> scaling, but the shift is 0.
>> From the dump, it looks like the other side is a Linux box.
>>
>> > Could Sephe give a suggestion about what is the problem here and how I
>> > can solve it?
>>
>> As Joerg has suggested, window scaling option may be problematic with
>> pf.  You could try set net.inet.tcp.rfc1323 to 0
>
>
> Here is another dump this time with rfc1323, sack and smartsack disabled. Do
> you notice something weird here?

17:48:34.875003 IP 203.16.214.214.41558 > 202.76.131.108.25: P
91:145(54) ack 218 win 49640
/* 17:48:34.915642 IP 202.76.131.108.25 > 203.16.214.214.41558: P
218:269(51) ack 145 win 58400 */
17:48:34.952747 IP 203.16.214.214.41558 > 202.76.131.108.25: P
7445:8337(892) ack 269 win 49640

Several segments (203.16.214.214 -> 202.76.131.108) are never seen by
the driver.

17:48:34.952792 IP 202.76.131.108.25 > 203.16.214.214.41558: . ack 145 win 58400

Application seems to use 5min timeout.  The question is why
203.16.214.214 did not rexmit?

17:53:34.930919 IP 202.76.131.108.25 > 203.16.214.214.41558: P
269:325(56) ack 145 win 58400
17:53:34.931606 IP 202.76.131.108.25 > 203.16.214.214.41558: F
325:325(0) ack 145 win 58400

Best Regards,
sephe

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