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[#] Thu Jan 20 2022 19:43:02 EST from IGnatius T Foobar

Subject: Re: Easy Install of fresh Ubuntu server ONLY listens on IPv6

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I went through all the setup steps and selected '*' to listen on both
IPv4 and IPv6 interfaces. When Citadel started I was not able to
access it. I checked my netstat and all of the cit services are ONLY
listening on IPv6. I know this server has an IPv4 interface, as that
is the address I am using to SSH to it. Any ideas why it would only
be using IPv6?

That may be misleading. On a Linux system (unlike, say, OpenBSD) listening on IPv6 with an address like "*" will also make it listen on IPv4. Can you post the output of "ss -lt" so we can see where it thinks it's listening?

I suspect the problem might be somewhere else.

[#] Thu Jan 20 2022 19:47:04 EST from UnexampledSalt

Subject: Re: Easy Install of fresh Ubuntu server ONLY listens on IPv6

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It does appear to be listening on all interfaces...hmm...

Found it. It was UFW. That is usually disabled on Ubuntu installs by default.

I allowed 80 and 443 through the firewall and we are all good! Thanks!



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