OPNsense Forum
English Forums => General Discussion => Topic started by: nibbler73 on July 04, 2017, 06:21:37 pm
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Hi Guys,
I've configured an OPNsense router and want to add IPv6 capability to our client pcs.
Basically everything works fine. The internet connection is managed by a Fritz Box 7490 and has a static IP from the provider.
OPNsense is connected to the Fritz Box and requesting an IPv6 network via prefix delegation. Alternative configuration is to add static IPv6 routing.
(Fritz Box) → (OPNsense) → (Client Network)
Both scenarios work fine, with some slight exceptions.
Most Dual-Stack servers are reachable without any issues.
Some hosts though (like https://www.heise.de) trigger a delay around 10 seconds, some others (like https://kb.vmware.com) are not reachable via IPv6 at all.
The behaviour:
* heise.de shows an initial 10 seconds delay, after that the site responds immediately for a couple of hours
* vmware.com does not get any answer through whatsoever
It is not an issue with the server as I can reach both above URLs when I connect to Fritz Box directly or via a mobile device (also IPv6 enabled).
The TCP connection is established from what I can see.
Client side states ESTABLISHED and OPNsense lists the connection as ESTABLISHED as well, e.g. in Firewall → Diagnostics → pfTop
It also does not seem to be an MTU related issue, as I can ping heise.de with large packets.
Any ideas what I can test or how to address this issue?
Regards,
Hrvoje