PPPoE and VPN Links

[pbix]

Eric,

I am unable to initiate SSL connections over a VPN link when I am using PPPoE. I tried DD-WRT and no problem so it seems specific to Gargoyle/OpenWRT. This is a strange one and I would investigate myself but I am a little confused about the source of pppd in Gargoyle.

Is this coming from OpenWRT? I see many references to PPPd fixes in your notes but I do not see and sources in the SVN.

pbix

[Eric]

Yeah, PPPoE is coming from OpenWRT. I havn't done much to it -- again because testing is a real issue for me. I've only modified a few network scripts. The one patch (07-ppp-dns-fix in the targets directory) fixes an issue with PPPoE and DNS, and gets applied to the openwrt PPPoE package.

[pbix]

After struggling with this issue I found that my MTU size is related to this problem. In my case I had the MTU selected at 1400 bytes. Setting the MTU to 1492 bytes resolved the issue I had with SSL over VPN links.

I don't know why this is connected to this problem but I thought I would post my experience here in case someone else runs into this.