Am 11.12.2014 um 04:48 schrieb Warren Young:
I’ve held off reporting this since I thought it might just be some kind of
fluke, but I’ve seen it now on three different boxes.
The symptom is that the stock configuration of Apache only listens for IPv6
connections:
$ netstat -na | grep :80.*LISTEN
tcp6 0 0 :::80 :::* LISTEN
No, that's just the way it is displayed for apache. In fact the service
listens on IPv4 as well (given we speak about the default configuration
with `Listen 80').
Easy to verify.
You should see a second line there for IPv4, but you don't:
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN
The stock httpd.conf file just says “Listen 80” which is documented as
listening on both IPv4 and IPv6. [1] You’re supposed to need to go out of your
way to get it to listen on just one or the other, but somehow CentOS 7’s Apache
manages it.
Since I only need IPv4, I’ve managed to hack it into working by changing that
line in /etc/httpd/conf/httpd.conf to:
Listen 0.0.0.0:80
Why do I need to do this?
[1] https://httpd.apache.org/docs/2.4/mod/mpm_common.html#listen
Alexander
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