Date: Tue, 14 Feb 2023 09:04:50 +0000 From: Arthur Chance <freebsd@qeng-ho.org> To: Ian Zimmerman <possessor.assizer305@aceecat.org>, freebsd-questions@freebsd.org Subject: Re: alias addresses both ipv4 and ipv6 Message-ID: <bdba1a63-81ee-7077-f34d-f21562e4816a@qeng-ho.org> In-Reply-To: <20230214010042.it7xu4zgx6ad4cht@beesty.loosely.org> References: <20230214010042.it7xu4zgx6ad4cht@beesty.loosely.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On 14/02/2023 01:00, Ian Zimmerman wrote:
> Hello,
> sorry for the newbie question. We live in the age of migrations.
>
> I need to have both an IPv4 and an IPv6 alias on the same net
> interface, and I am unsure of the numbers in the option names.
> If I screw this up I'll lock myself out of the system, so I
> better get it right.
>
> This is the networking part of my rc.conf now, with the obvious
> obfuscations.
>
>
> ifconfig_vtnet0="DHCP -tso -rxcsum -txcsum"
> #ifconfig_vtnet0_alias0="123.123.123.161/17"
> ifconfig_vtnet0_ipv6="inet6 accept_rtadv"
> ifconfig_vtnet0_alias0="inet6 dead:beef:dead:beef::2 prefixlen 64"
>
> The question is how to add the commented out line.
> Should it be alias0 (no conflict with the ipv6?), alias1 or what?
>
> I have read the rc.conf manpage, and sadly it doesn't really answer
> this. It discusses each of ipv4 and ipv6 in isolation.
>
You can mix IPv4 and IPv6 in ifconfig_???_aliases. Here's a chunk of one
of my rc.confs - ${ix0pfx} gives the IPv6 prefix for that interface.
ifconfig_ix0_aliases=" \
inet 172.23.1.53/32 \
inet6 ${ix0pfx}::1:123/64 \
inet6 ${ix0pfx}::1:143/64 \
inet6 ${ix0pfx}::1:2525/64 \
inet6 ${ix0pfx}::53:1/64 \
inet6 ${ix0pfx}::a53:1/64 \
"
As you can see it's one alias per line, with inet/inet6 as relavant for
each alias.
--
We build our computer systems the way we build our cities; over time,
without a plan, on top of ruins.
— Ellen Ullman
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?bdba1a63-81ee-7077-f34d-f21562e4816a>