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WebPanel => Apache => Topic started by: brahmi on April 07, 2023, 03:16:02 AM

Title: apache strange behavior
Post by: brahmi on April 07, 2023, 03:16:02 AM

Good morning
I noticed on one of my servers that the netstat info shows that it is listening on ipv6 and not on ipv4 like the other servers.

(https://quickdotnetinfo.com/logo/1.jpg)

command: netstat -pnltu

(https://quickdotnetinfo.com/logo/2.jpg)

it's normal ?

Title: Re: apache strange behavior
Post by: overseer on April 07, 2023, 07:59:20 AM

Yes, it's normal:

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ifconfig eth0or

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ifconfig ens33Look for the "inet6" line.
and test via lsof:

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[root@srv]# lsof -i :443
COMMAND    PID   USER   FD   TYPE  DEVICE SIZE/OFF NODE NAME
httpd    15319 nobody    8u  IPv6 5287623      0t0  TCP *:https (LISTEN)
httpd    26197   root    8u  IPv6 5287623      0t0  TCP *:https (LISTEN)
httpd    26218 nobody    8u  IPv6 5287623      0t0  TCP *:https (LISTEN)
httpd    26219 nobody    8u  IPv6 5287623      0t0  TCP *:https (LISTEN)
httpd    26220 nobody    8u  IPv6 5287623      0t0  TCP *:https (LISTEN)
httpd    26310 nobody    8u  IPv6 5287623      0t0  TCP *:https (LISTEN)
httpd    80303 nobody    8u  IPv6 5287623      0t0  TCP *:https (LISTEN)
httpd   107496 nobody    8u  IPv6 5287623      0t0  TCP *:https (LISTEN)
httpd   112527 nobody    8u  IPv6 5287623      0t0  TCP *:https (LISTEN)
httpd   128430 nobody    8u  IPv6 5287623      0t0  TCP *:https (LISTEN)
[root@srv]# lsof -i :80
COMMAND    PID   USER   FD   TYPE  DEVICE SIZE/OFF NODE NAME
httpd    15319 nobody    4u  IPv6 5287612      0t0  TCP *:http (LISTEN)
httpd    26197   root    4u  IPv6 5287612      0t0  TCP *:http (LISTEN)
httpd    26218 nobody    4u  IPv6 5287612      0t0  TCP *:http (LISTEN)
httpd    26219 nobody    4u  IPv6 5287612      0t0  TCP *:http (LISTEN)
httpd    26220 nobody    4u  IPv6 5287612      0t0  TCP *:http (LISTEN)
httpd    26310 nobody    4u  IPv6 5287612      0t0  TCP *:http (LISTEN)
httpd    80303 nobody    4u  IPv6 5287612      0t0  TCP *:http (LISTEN)
httpd   107496 nobody    4u  IPv6 5287612      0t0  TCP *:http (LISTEN)
httpd   112527 nobody    4u  IPv6 5287612      0t0  TCP *:http (LISTEN)
httpd   128430 nobody    4u  IPv6 5287612      0t0  TCP *:http (LISTEN)
If you would like to disable IPv6, add these lines to /etc/sysctl.conf

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net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1and run

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sysctl -pThen confirm with:

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ifconfig eth0or

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ifconfig ens33

Title: Re: apache strange behavior
Post by: brahmi on April 08, 2023, 08:58:47 AM

thank you for your reply