I believe so. I have two ports opened under Rules for my IPSEC configuration.


On Feb 28, 2014, at 3:27 PM, Brian Candler <b.cand...@pobox.com> wrote:

> Is it necessary to add explicit rules to allow inbound ISAKMP (UDP 500) and 
> ESP (IP protocol 50) on the WAN interface?
> 
> I had a problem with pfsense 2.0.1 failing to accept sessions initiated by a 
> Cisco ASA5505. tcpdump showed the ASA was sending ISAKMP phase 1 and pfsense 
> was not replying. I added a rule to allow UDP 500 in and after that it worked.
> 
> Is the same required for ESP?
> 
> Does pfsense 2.1 also require this? I have a new site with pfsense 2.1 which 
> hasn't shown this problem (yet), but that could just be through luck.
> 
> Thanks,
> 
> Brian.
> 
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