On 03/27/2014 03:40 PM, Rick Stevens wrote:
On 03/27/2014 09:50 AM, Robert Moskowitz issued this missive:
This is from a Fedora 20 client testing to a Centos 6.5 server.
I can do a ping6 with no problems, but I cannot 'ssh -6' to the server
(ssh -4 works). I have reason to suspect the challenge is in my PPPoE
link with a restricted MTU size that v6's PMTU is not working right
with.
So my question is: Is there a way to specify the MTU size for things
like ssh (and http) to use?
The odds are that your PPoE stuff has problems with IPV6 addressing (as
many things do). I really doubt the MTU has anything to do with it
since MTU sets the maximum size of a packet and has nothing to do with
the addressing mechanisms. You could have a router that doesn't like
big packets, but that would affect both IPV4 and IPV6.
ping6 works in both directions no problem. Addressing is right. I
actually have my own /48 allocation here.
It seems to be something with the firewall.
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