Resolver IP is the DNS Server IP of website. It is an optional parameter for OCSP stapling. OCSP stapling itself is an optional parameter but it is highly recommended to use it as it will improve SSL handshake speed of website.
If resolver IP it is not added, it defaults to the server's DNS IP.
You can get Server's DNS IP using following commands in Linux
Command: cat /etc/resolv.conf
Output:
options timeout:2 attempts:5
; generated by /sbin/dhclient-script
search ap-south-1.compute.internal
nameserver x.x.x.x
Resolver IP is the DNS Server IP of website. It is an optional parameter for OCSP stapling. OCSP stapling itself is an optional parameter but it is highly recommended to use it as it will improve SSL handshake speed of website.
If resolver IP it is not added, it defaults to the server's DNS IP.
You can get Server's DNS IP using following commands in Linux
Command: cat /etc/resolv.conf
Output:
options timeout:2 attempts:5
; generated by /sbin/dhclient-script
nameserver x.x.x.x
Alternative way:
Command: less /etc/resolv.conf
Output:
options timeout:2 attempts:5
; generated by /sbin/dhclient-script
nameserver x.x.x.x
Use this nameserver IP as resolver IP in configuration
If you have any problem using this nameserver IP you can use Google Public DNS (8.8.8.8 or 8.8.4.4 ) for resolver parameter. This IP resolves very fast, so there is no problem in its use.