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[lwip-users] VPN Client for incoming PPP connection

From: Marco Jakobs
Subject: [lwip-users] VPN Client for incoming PPP connection
Date: Fri, 04 Feb 2011 15:28:08 +0100
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv: Gecko/20101207 Lightning/1.0b2 Thunderbird/3.1.7

Dear LwIP users,

we are running LwIP (1.3.2) with FreeRTOS on a ATMEL AT91SAM7X512 embedded controller for our projects. Here we have implemented a small NAT routing to allow the usage of our device to connect devices on the ethernet port to a radio network which is connected by PPP.

We have now the requirement to connect the device(s) on the ethernet port by VPN to a master PC without NAT modification (so that they are accessible with their LAN IP's), so we need to be a VPN client to fulfill this.

Is there a VPN implementation for LwIP or has anybody realized this? Will it generally be possible to do this with LwIP (what support of the stack will be needed for this?)? At least, how many ressources must be available for such an extension?

Any thoughts are highly appreciated ... ;-)


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