Question How to open ports 80 and 443 on both IPv4 and IPv6

[technique-web]

Hi,

I'm having troubles while updating Let's Encrypt SSL, I found this :

Unable to issue Let's Encrypt certificate in Plesk: "Timeout during connect (likely firewall problem)" OR "Error getting validation data"

Applicable to: Plesk Onyx for Linux Symptoms Unable to install Let's Encrypt certificate either for a domain example.com in Domains > example.com > SSL/TLS Certificates or for securing P...

support.plesk.com

The solution don't work, but I found this comment :

Make sure that ports 80 and 443 are opened on both IPv4 and IPv6

Can't find how to do this in plesk ! I have a SSH access but I don't know what iptable rules I need to write

 

[Adam Makowski]

iptables -I INPUT -p tcp --dport 80 -j ACCEPT
iptables -I INPUT -p tcp --dport 443 -j ACCEPT
sudo netfilter-persistent save
sudo netfilter-persistent reload

or install plesk firewall extension
also check your server provider's firewall for blocked ports

 

[technique-web]

Thanks

How ca I check if the rules are ok ?

nmap -p 80 mysite.tld
PORT   STATE SERVICE
80/tcp open  http

nmap -6 -Pn -p80 mysite.tld
PORT   STATE    SERVICE
80/tcp filtered http

The state 'filtered' is the same before and after adding the two rules !

 

[mow]

Are your v6 adresses listed in Tools&Settings -> IP Addresses? If not, klick reread. If that doesn't help, Add.