Racoon/IPSEC Tunnel in 9.2 vs 10.0

[Matt Lager]

Do you utilize PF as your firewalling platform, because I'm slightly 
suspicious that could be the cause. In fact, it's a bit silly I haven't 
disabled it entirely to see if that resolves my issues. I'll probably 
run tests doing that tomorrow and will report back. PF did undergo a lot 
of changes as I understand it between 9 and 10.

On 4/14/2014 9:14 PM, Eugene M. Zheganin wrote:
> Hi.
>
> On 10.04.2014 02:15, Matt Lager wrote:
>> I have used IPSEC tunnels w/ racoon to establish point to point VPN
>> connections for a long time, with great success. I recently decided to
>> upgrade one of my endpoints to 10.0-RELEASE from 9.2-RELEASE-p3. I
>> didn't do an upgrade but did a fresh installation of 10.0-RELEASE, but
>> applied the identical VPN configuration that was working in
>> 9.2-RELEASE-p3. The tunnels came up fine, and setkey -D shows that
>> keys had been generated, connectivity appeared to be working at first
>> glance. I then started to work as normal through my VPN with things
>> like RDP, SQL Server, and other protocols, where I found that
>> connectivity started then came to a dead halt (not ICMP, which always
>> works fine). I did another fresh install of 9.2-RELEASE-p3, applied
>> the config, and everything worked as expected.
>>
>> I've read a lot about MTU's and fragmented traffic, but I'm trying to
>> figure out where I should be looking to fix things up. Something
>> obviously changed. I do use PF, and I know PF underwent some big
>> changes, so maybe it's a PF problem, but I thought I'd post here
>> first. I'm using the same PF config on the 10.0 system as I did on the
>> 9.2, of course making sure interfaces were all named properly and
>> whatnot.
>>
>> Any advice would be appreciated. Thanks!
>>
> I'm using FreeBSD on a variety of VPN/ipsec links. Nothing really
> changed in 10.x. In fact, I've skipped the 9.x branch entirely, because
> it has been worst release over many years. You should really investigate
> the problem, since it looks like it has nothing to do with the
> versining. As a wild guess I can assume you have FLOWTABLE in your
> kernel; if I'm right you should get rid of it.
>
> Eugene.
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