Re: ipf 4.1.13 + NAT + FTP proxy = window scaling problem

On Thu, 21 Dec 2006, Darren Reed wrote:
> Pekka Savola wrote:
>> On Thu, 21 Dec 2006, Darren Reed wrote:
>>> ok, please apply the attach patch so I can collect some information from
>>> the kernel.
>>
>> The output is like follows (there are no such messages if FTP proxy is
>> disabled):
>>
>> fdata:maxend 1129616061 end 1129616337
>> fdata:end 1129672809 seq 1129614889
>> fdata:winflags 4 winscale 0
>> tdata:winflags 0 winscale 0
>> ack 2182360656 ackskew 0 win 65160 << 0 maxwin 8192
>
> Ah, I think I've read the RFC incorrectly and interpreted it to
> mean that if either end is not doing window scaling then it is
> not enabled.
>
> The attached diffs should undo that madness.

Hmm.. it still doesn't seem to work. The messages are like:

fdata:maxend 4163995118 end 4163996566
fdata:end 4163995118 seq 4163995118
fdata:winflags 7 winscale 6
tdata:winflags 0 winscale 0
ack 423266013 ackskew 0 win 4170240 << 6 maxwin 8192
fdata:maxend 4163995682 end 4163998014
fdata:end 4163995118 seq 4163996566
fdata:winflags 7 winscale 6
tdata:winflags 0 winscale 0
ack 423266013 ackskew 0 win 4170240 << 6 maxwin 8192
fdata:maxend 4163995682 end 4163999462
fdata:end 4163995118 seq 4163998014
fdata:winflags 7 winscale 6
tdata:winflags 0 winscale 0
ack 423266013 ackskew 0 win 4170240 << 6 maxwin 8192
fdata:maxend 4163995682 end 4164000910
fdata:end 4163995118 seq 4163999462
fdata:winflags 7 winscale 6
tdata:winflags 0 winscale 0

--
Pekka Savola "You each name yourselves king, yet the
Netcore Oy kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings