I would like Apache to listen on the link-local ipv6 address on a particular interface. I have the following line in my httpd.conf:
Which is based on the Apache documentation here: https://httpd.apache.org/docs/2.4/bind.html "IPv6 addresses must be enclosed in square brackets"
My operating system/Apache version details are as follows:
$ httpd -v Server version: Apache/2.4.18 (Unix) Server built: Dec 14 2015 08:05:54 $ uname -rv 4.3.3-3-ARCH #1 SMP PREEMPT Wed Jan 20 08:12:23 CET 2016
The result shown using
journalctl -e is:
(22)Invalid argument: AH00072: make_sock: could not bind to address [fe80.....
IPv6 is working because I have sshd and dnsmasq listening. I have tried appending two different scope ID suffixes to the address. You can use either the interface id
3 or name
net1 as a scopeid in both
$ ip addr | grep -Po "^\d: \S+" 1: lo: 2: net0: 3: net1: $ for scopeid in 3 net1; do ping6 -c 1 fe80::a00:16ff:fe89:420f%$scopeid; done | grep loss 1 packets transmitted, 1 received, 0% packet loss, time 0ms 1 packets transmitted, 1 received, 0% packet loss, time 0ms
sshd_config works with either:
So with all this in mind I tried the following in httpd.conf
Adding either scopeid made Apache fail earlier in its start up process.
journalctl -e shows a syntax error when parsing httpd.conf as follows:
AH00526: Syntax error on line 52 of /etc/httpd/conf/httpd.conf:
Scope id is not supported
Apache listens on the localhost ipv6 if I do
I would expect
Listen 80 to get Apache to bind to both ipv4 and ipv6, but it doesn't. It only binds to ipv6 addresses - netstat shows:
tcp6 0 0 :::80 :::* LISTEN
In this case, Apache does accept requests on the link-local address on net1. I have to specify
0.0.0.0:80 or a specific ipv4 address for it to listen on ipv4.
So, how do I make Apache bind to one specific link-local address (not all of them - I want to avoid listening on other interfaces), or is it just not possible for Apache to listen on a link-local ipv6 address?
net1? Either seems unlikely, so it's unclear why you attempted to use these.
Scope id is not supportedcertainly suggests that it isn't supported - at least not with the version of Apache that you are using. I couldn't get Apace to do it either. Listening on
::will accept connections over link-local addresses, that's about as close to an answer as I can get. Any more definitive answer than that would have to be based on a reading of the actual source code.