Don’t disable IPv6, block the traffic instead

It is a somewhat common practice to disable IPv6 when you have to deal with no such traffic. However, doing so may have some unintended consequences, like when running rpcbind for NFS sharing:

Feb 20 11:27:12 server systemd[1]: rpcbind.socket failed to listen on sockets: Address family not supported by protocol

So, don’t disable IPv6 traffic. Aim to blocking it instead. Or if you must have it disabled, read here.

PS: This is not a post advocating not adopting IPv6. This is simply a workaround if the situation arises. You need to operate in an IPv6 world.

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