For what it’s worth, I VPN over PPPOE very often …. Works very well.  However I 
did have a point in time where it was totally unstable and after some wireshark 
traces I found it to be an MTU issue for sure.  The client was Pulse Secure 
(former Juniper Pulse) and I was unknowingly running an older client … the 
client didn’t do path discovery correctly and sent all traffic with DF bit set 
…doh …

 

I upgraded the client and all is well since 

 

Paul

 

 

From: Af <[email protected]> on behalf of Mathew Howard 
<[email protected]>
Reply-To: <[email protected]>
Date: Monday, February 26, 2018 at 7:57 PM
To: af <[email protected]>
Subject: Re: [AFMUG] OT VPN over PPPOE

 

It's a pretty good bet that any Pppoe connection is going to have an MTU of 
1492 or less... But yeah, any decent VPN client should be able to handle that 
just fine... and most un-decent ones too, for that matter

 

On Mon, Feb 26, 2018, 6:28 PM Forrest Christian (List Account) 
<[email protected]> wrote:

Depending on the exact settings in PPPoE it may have a smaller MTU than 'normal 
ethernet'.

 

Any decent VPN should be able to handle this, however.

 

-forrest

 

On Mon, Feb 26, 2018 at 5:06 PM, Chuck McCown <[email protected]> wrote:

Had a customer that works from home.  Could not make his VPN work.  

We thought perhaps it was a port issue.  Opened the ports on the Smart RG.  No 
good.

 

He spend $150 over the weekend on a geek squad type of service and they pointed 
their finger at us.  

 

So, just because we haven’t tried it, we switched him to DHCP and it started 
working.

We are in the process of converting everyone to DHCP.

 

He wants a credit in the amount of the money he paid the geek squad.  

 

Wonder if it was truly our fault.  Still don’t know why it started working or 
what the problem was.  



 

-- 

Forrest Christian CEO, PacketFlux Technologies, Inc.Tel: 406-449-3345 | 
Address: 3577 Countryside Road, Helena, MT 59602
[email protected] | http://www.packetflux.com  

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