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How to implement an iptable rule in FIAIF?


I installed a server with Linux distribution 2.6.26-1-686 and an ADSL card Sangoma S518. This server is protecting a subnetwork with FIAIF.

The MTU agreed with the ISP is MTU = 1492. However, per default I got a routing problem because the MTU defined for my subnetwork is MTU = 1500. Then it generates Path MTU discovery failure.

Then I had to add the following rule in my iptable:
iptables -t mangle -A PREROUTING -p tcp --tcp-flags SYN,RST SYN -i eth0 -j TCPMSS --set-mss 1400

However, I currently use FIAIF and I would prefer to translate this iptable rule in a FIAIF's language.

Does anyone know how to do that?


Thomas Nguyen-Van 

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