Hi,
I have the following setup
In a datacenter:

- a set of racked boxes with IP a.b.c.0/255

- a box as a router R1 with IP a.b.c.21
At work:

- an ADSL connexion with IP x.y.z.91

- a router with a NAT

- a router R2 Soekris with IP 192.168.250.33 (sis0) a.b.c.22 (sis1)

- a iMac connected to the soekris (sis2) with IP a.b.c.23
I manage to have an etherip route between R1 and R2 thru the NAT, with

some parameters in the NAT and correct IPs, bridges config, etc. on both

routers.
Everything works as expected, I can surf from my iMac.
BUT, for some sites (most of the time with HTTPS), the connexion freezes

after the first page is displayed.

I try to understand what is happening, tcpdump of each interface and

trying to follow the packets. But no idea.
Does anybody has a suggestion ?
Note: I have no control on the NAT router (except to add one rule to

redirect traffic to R2).
JG