[SOLVED]error Problem binding to port 80: Could not bind to IPv4 or IPv6 when Renew SSL Dns server Vestacp Certbot Let's Encrypt

 Error Problem binding to port 80: Could not bind to IPv4 or IPv6 when Renew SSL Dns server Vestacp Certbot Let's Encrypt on Centos 7 Linux

Hi,

I got this problem before and I solved this following step below:

Currently I use the VestaCP install on Centos 7 and use the FirewallD

After I checking I see that my server was protected by FirewallD and use the zone is "Trusted"

and I just only allow some port and some IP specific.

[Solved]

Changed the default zone

1. View current default zone

firewall-cmd --get-default-zone

2. Set new default zone

firewall-cmd --set-default-zone zone-name

3. Assigning a Network Interface to the new default zone [REQUIRED]

firewall-cmd --zone=zone-name --change-interface=<interface-name>

4. Restart FirewallD

firewall-cmd --reload

5. Try renew your DNS SSL again.