[Swan] Windows 7/10 ipsec issues

Computerisms Corporation bob at computerisms.ca
Thu Dec 12 20:44:02 UTC 2019

Hi John,

if your ipsec sa established line is coming up and xl2tp logs (I think 
syslog on debian?) are showing nothing, I would check:

xl2tpd is listening on 1701

use tcpdump to see if any packets are reaching 1701

iptables might be blocking the connection, find the nf-packetflow 
diagram and put logging entries in the appropriate tables/chains to see 
where the packets are being dropped

disable any and all firewalls on windows side

On 2019-12-09 1:44 p.m., John Crisp wrote:
> On Thu, 31 Oct 2019 20:24:40 +0100
> John Crisp <jcrisp at safeandsoundit.co.uk> wrote:
>> I'll keep poking about.
> Hmm - I am completely flummoxed here.
> I am no Windows expert but I can usually sit down, fiddle and make
> something work.
> In this case I seem to get a Ipsec connection but it never passes to
> xl2tpd and I can't see where why or how it fails.
> The Linux & Android connections work perfectly !
> Any suggestions appreciated.
> B. Rgds
> John
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