Control Web Panel
WebPanel => CentOS-WebPanel GUI => Topic started by: anandmys on April 25, 2025, 05:28:17 AM
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Apr 25 00:22:01 hosting NetworkManager[676]: [1745558521.6932] platform-linux: do-add-ip6-address[2: fe80::250:56ff:fe40:f5e8]: failure 13 (Permission denied)
Apr 25 00:22:03 hosting NetworkManager[676]: [1745558523.6955] ipv6ll[7815b866a956efe0,ifindex=2]: changed: no IPv6 link local address to retry after Duplicate Address Detection failures (back off)
Apr 25 00:22:03 hosting NetworkManager[676]: [1745558523.6958] platform: (eth0) route-sync: failure to add IPv6 route: type unicast fe80::1/128 dev 2 metric 100 mss 0 rt-src user: Permission denied
Apr 25 00:22:13 hosting NetworkManager[676]: [1745558533.7064] platform-linux: do-add-ip6-address[2: fe80::250:56ff:fe40:f5e8]: failure 13 (Permission denied)
Apr 25 00:22:15 hosting NetworkManager[676]: [1745558535.7089] ipv6ll[7815b866a956efe0,ifindex=2]: changed: no IPv6 link local address to retry after Duplicate Address Detection failures (back off)
Apr 25 00:22:15 hosting NetworkManager[676]: [1745558535.7093] platform: (eth0) route-sync: failure to add IPv6 route: type unicast fe80::1/128 dev 2 metric 100 mss 0 rt-src user: Permission denied
Apache log file shows these lines. Should I ignore or should I fix this?
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If unused, consider disabling IPv6 to simplify your network stack (I have):
https://webhostinggeeks.com/howto/disable-ipv6-on-redhat-centos-6-centos-7/ (https://webhostinggeeks.com/howto/disable-ipv6-on-redhat-centos-6-centos-7/)
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IPV6 is already disabled in kernel
Should it be disabled in networkmanager?
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If it's disabled in the kernel, there shouldn't be anything left to do (after rebooting). Can you show the results of
ip a | grep net6
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If you don't want IPv6 and are using AlmaLinux, you can use nmtui and disable it.
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If it's disabled in the kernel, there shouldn't be anything left to do (after rebooting). Can you show the results of
ip a | grep net6
[root@hosting ~]# ip a | grep net6
[root@hosting ~]# ip a | grep net6
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If you don't want IPv6 and are using AlmaLinux, you can use nmtui and disable it.
#nmcli connection show
NAME UUID TYPE DEVICE
System eth0 3521111a-4fxx-43xx-x444-1xxxxxxxxx0 ethernet eth0
# nmcli connection modify System ipv6.method "disabled"
Error: unknown connection 'System'.
What is the connection name I should use?
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If you don't want IPv6 and are using AlmaLinux, you can use nmtui and disable it.
#nmcli conn show "System eth0"
connection.id: System eth0
# nmcli connection modify "System eth0" ipv6.method "disabled"
Error: Failed to modify connection 'System eth0': ipv6.addresses: this property is not allowed for 'method=disabled'
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It wouldn't appear that IPv6 is enabled on your system, but you can double check here:
sysctl -a | grep -i ipv6
nmtui is a semi-graphical utility, so the procedure is not just a single command but a series of steps.
Invoke nmtui with sudo in a root shell: nmtui
Click on Edit a connection.
Select the interface you want to edit (eth0).
Go to IPv6 with the arrow keys on the keyboard.
Then select Disabled and click OK.
Run the ip a command from the terminal to confirm that IPv6 is no longer available.
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Then select Disabled and click OK.
Run the ip a command from the terminal to confirm that IPv6 is no longer available.
Unable to save connection: │ │
│ │ [ ] Ignore aut│ ipv6.addresses: this property is │ │
│ │ │ not allowed for 'method=disabled' │
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Edit the file - /etc/sysctl.conf
e.g. nano /etc/sysctl.conf
Add the line:
net.ipv6.conf.all.disable_ipv6 = 1
Save, Exit and Reboot
Then IPv6 will be Disabled.
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Edit the file - /etc/sysctl.conf
e.g. nano /etc/sysctl.conf
Add the line:
net.ipv6.conf.all.disable_ipv6 = 1
Save, Exit and Reboot
Then IPv6 will be Disabled.
It is already disabled.
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So are you trying to Enable or Disable IPv6?
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By default Apache will listen both on IPv6 and IPv4, as defined by the Listen directive:
Listen 80If you want to restrict it to listen on IPv4 only, change the setting to:
Listen 0.0.0.0:80Repeat for port 443 to stop Apache from listening for HTTPS connections on IPv6:
Listen 0.0.0.0:443
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So are you trying to Enable or Disable IPv6?
IPv6 is disabled.
Apache logs show lots of warnings like
May 15 01:42:03 hosting NetworkManager[669]: [1747291323.8795] platform: (eth0) route-sync: failure to add IPv6 route: type unicast fe80::1/128 dev 2 metric 100 mss 0 rt-src user: Permission denied
My initial question was
Should these warnings be ignored? Or should I work on the cause and correct it?
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Your choice to ignore the errors or remove the root of the problem. I just gave that possibility to you in the previous post, now that we've worked out that IPv6 is indeed disabled on your system.