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Date: Thu, 4 May 2006 13:07:18 +0200 (CEST)
From: Bernhard Fischer <>
Subject: TCP-Tuning

Problem: while transfering data through a dual-hosted-nat gateway,
bandwidth differs about factor 5..10 instead of direct connections.

1. scenarion: single machine
- machine directly connected to the internet
- transfering 10MB of data within 10 seconds

so far, so good!

2. scenario: gateway
- two lan-interfaces (WAN: 10Mbit, LAN: 100Mbit)
- transfering 10MB of data through the gateway within 122 seconds ?!?

How do i have to configure both lan-interfaces for best throughput?
When i look at the traffic-statistiks, there is a gap of 200ms silence
followed by 300ms transmission. Why?

Any help or hints are very welcome!


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