2620:119:35::35 + 2620:119:53::53
We support recursive IPv6 DNS resolution, and security and content filtering for IPv6 traffic. Our IPv6 DNS server addresses are:
Now Available: IPv6 addresses can be registered as network identities in Umbrella.
The last block of IPv4 addresses have been allocated, and it’s time to get your network ready for IPv6. Cisco Umbrella now supports IPv6 addresses — meaning you’ll be able to resolve your DNS using IPv6 DNS servers.
IPv6 supports a far larger number of addresses than IPv4, which is why the change is taking place now — since IPv4 was implemented in 1981, the internet has grown dramatically, and there are no more available IPv4 addresses.
IPv4 — Within an IPv4 only network environment all communication is done by using IPv4 as a transport protocol.
IPv6 — Within an IPv6 only network environment all communication is done by using IPv6 as a transport protocol.
Dual Stack — When a device has dual stack capabilities then it has access to both IPv4 and IPv6 technology available. It can use both of these technologies to connect to remote servers and destinations in parallel.
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