Resolved Cannot retrieve channel.xml for channel "pecl.php.net"

[yog512]

Server operating system version

Ubuntu 24.04

Plesk version and microupdate number

18.0.67#1

Hi,
i cant install PECL Packages which is not responding:
# /opt/plesk/php/8.4/bin/pecl channel-update pecl.php.net
Updating channel "pecl.php.net"
Channel "pecl.php.net" is not responding over http://, failed with message: Connection to `pecl.php.net:80' failed: Connection timed out
Trying channel "pecl.php.net" over https:// instead
Cannot retrieve channel.xml for channel "pecl.php.net" (Connection to `ssl://pecl.php.net:443' failed: Connection timed out)

In Plesk, for every PHP Version it is impossible to install any PECL Package. I´ve tried to update Channel, see above and it fails.

 

[scsa20]

Are you able to reach pecl.php.net? It's possible at the time when you tried to do it that pecl.php.net's server was down, either that or pecl.php.net is being blocked from your server for whatever reason.

 

[yog512]

I've been trying for a week. Maybe it's because of Immunify 360?

I don't think it's banned:
root@XXXXXX:~# wget https://pecl.php.net/get/apcu-5.1.24.tgz
--2025-02-08 04:04:43-- https://pecl.php.net/get/apcu-5.1.24.tgz
Resolving pecl.php.net (pecl.php.net)... 2604:a880:800:10::621:6001, 104.236.228.160
Connecting to pecl.php.net (pecl.php.net)|2604:a880:800:10::621:6001|:443... failed: Connection timed out.
Connecting to pecl.php.net (pecl.php.net)|104.236.228.160|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 90866 (89K) [application/octet-stream]
Saving to: ‘apcu-5.1.24.tgz.1’

apcu-5.1.24.tgz.1 100%[==================================>] 88.74K 485KB/s in 0.2s

2025-02-08 04:06:57 (485 KB/s) - ‘apcu-5.1.24.tgz.1’ saved [90866/90866]

Ok, there seems IPv6 not working. I don't know.

 

[scsa20]

If your server does not need IPv6, disable it, otherwise change the priority so IPv4 is preferred then figure out why your IPv6 is not working afterwards.

 

[yog512]

Ok. That was it.
vim /etc/sysctl.conf
adding then on the bottom:
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1

sysctl -p
systemctl restart networking

and then the same thing backwards (i need v6!)

remove
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1

sysctl -p
systemctl restart networking

root@XXXXXX:~# /opt/plesk/php/8.4/bin/pecl channel-update pecl.php.net
Updating channel "pecl.php.net"
Update of Channel "pecl.php.net" succeeded

I dont know why it now runs, but it is now fully functionally.

 

[yog512]

Ok. Thats not correct. It was still ipv4, which was the cause that it runs.
I have manually add IPv6 with

https://support.plesk.com/hc/en-us/articles/12377462694807-How-to-enable-IPv6-addresses-on-a-Plesk-server

Then repair IP Adress in Plesk (ipv6 was broken)

Thats important, because letsencrypt and other things need this when before it runs with 4 AND 6.