From: "Rob Sterenborg (lists)" <lists@sterenborg.info>
To: Steven O'Connor <steven@suse.com.au>, netfilter@vger.kernel.org
Subject: Re: PPTP passthrough
Date: Wed, 3 May 2017 16:45:16 +0200 [thread overview]
Message-ID: <86316f95-37e3-8f80-d9ee-c4f6c428ff1c@sterenborg.info> (raw)
In-Reply-To: <6d2c9c2f-2636-9e3f-b8e1-eec95eb02370@suse.com.au>
On 3-5-2017 04:13, Steven O'Connor wrote:
> PPTP pass-through seems to be broken. When the client tries to connect,
> a gre packet is sent but the reply gre packet is dropped at my firewall.
>
> The relevant conntrack dump shows a mismatch between the expected reply
> and the packet received, srckey/dstkey do not match. Is that significant?
>
>
> gre 47 27 src=aaa.bbb.cc.ddd dst=www.xxx.yy.zz srckey=0x0
> dstkey=0xb053 [UNREPLIED] src=www.xxx.yy.zz dst=aaa.bbb.cc.ddd
> srckey=0xb053 dstkey=0x0 mark=0 use=1
> gre 47 27 src=192.168.0.212 dst=aaa.bbb.cc.ddd srckey=0x0
> dstkey=0x1380 [UNREPLIED] src=aaa.bbb.cc.ddd dst=www.xxx.yy.zz
> srckey=0x1380 dstkey=0x0 mark=0 use=1
You don't show any rules, so just a guess.
Do you allow/forward protocol 47 (gre) packets?
--
Rob
next prev parent reply other threads:[~2017-05-03 14:45 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-03 2:13 PPTP passthrough Steven O'Connor
2017-05-03 10:38 ` Robert White
2017-05-04 3:46 ` Steven O'Connor
2017-05-04 19:58 ` Robert White
2017-05-03 14:45 ` Rob Sterenborg (lists) [this message]
2017-05-04 3:42 ` Steven O'Connor
2017-05-04 6:07 ` Rob Sterenborg (Lists)
2017-05-04 6:11 ` Rob Sterenborg (Lists)
2017-05-04 18:46 ` Pascal Hambourg
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