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Author Topic: Unable to access websites - SonicWall (TZ600 on  (Read 55 times)


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Unable to access websites - SonicWall (TZ600 on
« on: October 17, 2017, 06:01:17 AM »

Hi guys,

I've setup a TZ600 with a /64 from HE and both the TZ and my computers behind are able to ping IPv6 IPs and are able to resolve IPv6 hostnames via an IPv6 DNS server (google). But whenever I try to access IPv6 websites, the connection fails. I tried from several devices and used different browsers, with the same result.

I've done a packet capture on the TZ and I can see that the TCP three way handshake works fine and the browser sends the client hello, but there isn't any response to the client hello. Anyone ever came across that?

I will have to play with the security services later, to make sure that they are not the problem, but they shouldn't be an issue.


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Re: Unable to access websites - SonicWall (TZ600 on
« Reply #1 on: October 17, 2017, 08:32:48 AM »

Sounds like you may have an MTU issue

Any chance there's a firewall interfering?