Hurricane Electric's IPv6 Tunnel Broker Forums

General IPv6 Topics => IPv6 on Linux & BSD & Mac => Topic started by: webmany on September 24, 2010, 11:33:23 PM

Title: Apple Airport and DSL
Post by: webmany on September 24, 2010, 11:33:23 PM
Just finished fighting this for a couple of hours and thought I would write it here in case someone else has the same problem.

I have a brand new dual band airport extreme that I have setup with a tunnel to HE.  The tunnel came up and I was able to ping6 fine, but was unable to connect to any HE webpages using my browser.  I ended up having to change the MTU size on the laptop I was using to 1472 in order to make it work.  Smaller MTU size will also work, but nothing larger.

The DSL I have uses PPPOE, so it already shrinks the usable MTU to 1492, then add the tunnel and you have 1472.  I am guessing that HE has a firewall that is not allowing fragmentation, but have not looked further yet.