Sorry Kurt. I was meant to reply to your message.
Does he have to open then tcp 6 and udp 17 re ESP?

Thanks
Pierre



I believe you'll need to make sure that IP Protocol 50 is enabled as 
well, for ESP. 

http://en.wikipedia.org/wiki/Layer_2_Tunneling_Protocol 

On Sat, Mar 3, 2012 at 04:33, Pierre Camilleri 
<pierre.camill...@fosterclark.com> wrote: 
> Hi everyone 
> 
> I wonder if someone could help me solve this issue. A friend of mine is 
> having issues when trying to connect to his office network using a vpn 
> connection with L2TP. He is using Windows 7 Ultimate and the office server is 
> running MS SBS 2010. He can't just get this vpn connection to work. All the 
> required ports are opened on the Juniper firewall i.e. udp ports 4500, 500 
> and 1701.
 > Any idea what could be wrong and where to check further? 
> 
> TIA 
> Pierre 
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