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ipv6 prefix length

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Posts: 3
Registered: ‎27-06-2019

ipv6 prefix length

by RogerWilco Starter Poster
Message 1 of 3 (342 Views)

Hi,

 

According to this I I should expect a /56 when I enable ipv6 on my router: http://help.vodafone.co.nz/app/answers/detail/a_id/24011/~/about-vodafone-and-ipv6

 

I'm using a Sophos/Astaro UTM, and when I enable ipv6, I get a /128 assigned to my external interface, which isn't quite what I expected to see: 2407:7000:f01c:0:20c:29ff:feed:a9cc/128

 

Can anyone tell me what I'm missing?

 

Using HFC/FibreX.

 

Thanks! 

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Posts: 3
Registered: ‎27-06-2019

Re: ipv6 prefix length

by RogerWilco Starter Poster
Message 2 of 3 (327 Views)

Doing a bit of digging, I wonder whether the /56 I'm getting is really:

2407:7000:f01c:0:0:0:0:0
2407:7000:f01c:ff:ffff:ffff:ffff:ffff

 

See: https://www.ultratools.com/tools/ipv6CIDRToRangeResult?ipAddress=2407%3A7000%3Af01c%3A0%3A20c%3A29ff...

 

I'm trying a few networks inside the firewall like 2407:7000:f01c:[1-5]:0:0:0:0 and they seem to work, so hopefully I'm not causing any issues!

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Posts: 3
Registered: ‎27-06-2019

Re: ipv6 prefix length

by RogerWilco Starter Poster
Message 3 of 3 (308 Views)

Spoke too soon. I had NAT enabled, so the internal addresses weren't visible outside. When I turn NAT off, I can see traffic from my prefixes going out, but nothing coming back. Routing problem or I have misunderstood what networks I should create? 

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