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IPv6 is the next generation protocol for Internet networking. IPv6 expands on the current Internet Protocol standard known as IPv4. Compared to IPv4, IPv6 offers better addressing, security and other features to support large worldwide networks.

25 votes

How would disabling IPv6 make a server any more secure?

These days, most people actually are using IPv6 even if they don't have global IPv6 connectivity. … Windows 8 and later use IPv6 extensively on home networks, and some Windows features absolutely require IPv6. …
Michael Hampton's user avatar
5 votes
Accepted

Is receiving IPv4 connections on AF_INET6 sockets insecure?

One example of such is IPv4-mapped IPv6 addresses (::ffff/96): a representation of an IPv4 address as an IPv6 address inside an operating system as defined in [RFC3493]. … If an attacker transmits an IPv6 packet with IPv4-mapped addresses in the IPv6 source and destination fields to a protocol that swaps IPv6 source and destination addresses, he might be able to use a node …
Michael Hampton's user avatar