Hi there,

Le 16 mai 2010 ` 14:26, Claudio Jeker a icrit :

> On Sat, May 15, 2010 at 05:15:21PM +0200, Xavier Beaudouin wrote:
>> Hi Stuart,
>>
>> Le 15 mai 2010 ` 13:47, Stuart Henderson a icrit :
>>
>>> On 2010-05-15, Xavier Beaudouin <[email protected]> wrote:
>>>> Hello,
>>>>
>>>> I am running OpenBSD 4.7-current, and it seems I have some problems to
>>>> negociate tcp md5 bgp session... They doesn't seems at all to wake up, I
>> have
>>>> connection timeout... or what ever.
>>>
>>> Please show ipsecctl -sa and netstat -rnfencap
>>
>> # netstat -rnfencap
>> Routing tables
>> (empty)
>>
>> # ipsecctl -sa
>> FLOWS:
>> No flows
>>
>> SAD:
>> tcpmd5 from 194.68.129.120 to 194.68.129.151 spi 0x18ca8716
>> tcpmd5 from 194.68.129.120 to 194.68.129.150 spi 0x38c985dd
>> tcpmd5 from 194.68.129.114 to 194.68.129.120 spi 0x4f5d8833
>> tcpmd5 from 194.68.129.103 to 194.68.129.120 spi 0x5351ca6b
>> tcpmd5 from 194.68.129.120 to 194.68.129.115 spi 0x7a989c0e
>> tcpmd5 from 194.68.129.120 to 194.68.129.121 spi 0x8c8c5051
>> tcpmd5 from 194.68.129.129 to 194.68.129.120 spi 0xaece6b67
>> tcpmd5 from 194.68.129.121 to 194.68.129.120 spi 0xbb6260f1
>> tcpmd5 from 194.68.129.115 to 194.68.129.120 spi 0xbc589b6f
>> tcpmd5 from 194.68.129.120 to 194.68.129.129 spi 0xc16133b3
>> tcpmd5 from 194.68.129.120 to 194.68.129.114 spi 0xc36216e4
>> tcpmd5 from 194.68.129.120 to 194.68.129.103 spi 0xc39e4d97
>> tcpmd5 from 194.68.129.150 to 194.68.129.120 spi 0xc8bf11ca
>> tcpmd5 from 194.68.129.120 to 194.68.129.102 spi 0xcc6b7756
>> tcpmd5 from 194.68.129.102 to 194.68.129.120 spi 0xd9097ad1
>> tcpmd5 from 194.68.129.197 to 194.68.129.120 spi 0xdb53b930
>> tcpmd5 from 194.68.129.151 to 194.68.129.120 spi 0xde1e91da
>> tcpmd5 from 194.68.129.120 to 194.68.129.197 spi 0xe630b27a
>>
>>
>> The .120 is my IP :p
>>
>>> I have md5 working with a kernel from April 28th and an absolutely
>>> -current bgpd, and also with the version from the Apr 28th snapshot,
>>> so I don't think there is a general problem with the code you're
>>> running.
>>
>> I'm allmost sure there is no problems... I still try to find where is it
the
>> problem :(
>>
>> If you have any hints.. I'm be happy to apply them...
>
> Did it work before the update with that peer?
> Most of the time the problem is different passwords or some other
> misconfiguration. TCP MD5 is an ugly hack that has some nasty
> ramifications (it breaks some basic behaviour of TCP e.g. RST signaling).

Hum, this is strange, in fact all tcp md5 sessions doesn't work at all.

I can give you access to this router if you like Claudio... :)

Xavier

> Normaly the best is to turn of md5 and check that the session works. Then
> enabling md5 or use ttl-security.
> --
> :wq Claudio

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