Whitelist

Important IP Addresses to Whitelist

The following are important IP Addresses that need to be whitelisted. When adding this to an IPTables chain they need to be inserted after you have added your blacklist ipsets or appended as the first items in your chain.

MXToolbox:
This is very useful for ensuring you are RFC Compliant when setting up an email server click here for the link to this information at mxtoolbox.com

• US-EAST-1A: 44.194.168.193/32
• US-EAST-1B: 52.55.244.91/32
• US-EAST-1C: 18.205.72.90/32
• US-EAST-1D: 18.209.86.113/32

LetsEncrypt:
This is used by many so thought I should add the IP Addresses that definately need to be added to run “certbot renew”. This list does not always work as LetsEncrypt uses a number of Amazon Web Services IP addresses when verifying a certificate. Since this is the case if you are using the RBL here (for now only the WordPress firewall) you can drop the ipset US-WA.Seattle using the command:
~]# iptables -D INPUT -m set –match-set US-WA.Seattle src -j DROP
However I will be adding a bash script to this site for doing a LetsEncrypt update.