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SubjectRe: IPv4 NAT UDP Traversal issue
From
2010/4/20 飞颜 <win847@gmail.com>:
> Dear all,
>
> I have a question about Linux NAT, our Product is ADSL
> Router(Linux Version is 2.6.22.15), and Now our customers requirment
> is below:
>
> IPv4 Nat: UDP Traversal through NAT, must support STUN
> (RFC3489) the four ways: Full Cone、Restricted Cone、Port Restricted
> Cone and Symmetric
>
> As I known, netfilter IPv4 NAT is belonged to Symmetric type.
> and if want UDP Traversal through NAT, NAT Device can not be Port
> Restricted Cone and Symmetric type if the other is Symmetric type.
>
> So my question is: Can iptable set the UDP NAT converted to
> Full Cone or Restricted Cone type?
>
> we now set NAT use iptables below:
>
> Chain POSTROUTING (policy ACCEPT)
> target prot opt source destination
> MASQUERADE all -- anywhere anywhere
>
> Thanks very much!
>
> BR,
> win847
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