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2003 Jan 15
1
Double NATed VPN
...I must :-) - configure a VPN server behind 2 NATs.
My situation:
RoadWarior - INet - ISP Router (NAT+PortForwarding) - Inetranal Router
(running Shorewal, NAT+PortForwarding) - Inetranl VPN Server
If RoadWariror try to connect Internal VPN Server then connection failed
with "GRE: Bad check chcksum from pppd" message.
If I try connect to this VPN server from LAN then connection is
estabilished well.
I have rules
DNAT net loc:10.1.4.20 tcp 1723
DNAT net loc:10.1.4.20 gre
Can be problem with "double NAT"?
Can you help please?
Zbynek Cvach
2013 Dec 05
14
Re: Question about TCP checksum offload in Xen
On Tue, Dec 03, 2013 at 01:00:23PM +0000, Balraj Singh wrote:
> Hi,
>
> I''m working on verifying TCP checksums on incoming packets in Mirage, but
> I''ve run into a bit of a problem.
>
> If TCP checksum offload is turned on on a virtual interface (this is the
> default), and if the TCP connection is local to the machine, it looks like
> Xen does not