MikroTik Tutorial: Firewall ruleset for IPsec whitelisting

MikroTik Tutorial: Firewall ruleset for IPsec whitelisting

This article will show you how to setup a firewall whitelist for IPsec peer associations on a MikorTik router. The firewall ruleset will make use of address-lists to allow UDP 500 traffic only from trusted networks.

The address list for trusted networks will be called ipsec-trusted-nets and all other hosts that attempt IPsec traffic will be added to the list ipsec-uninvited.

Here are the firewall input rules

Please Note: This is not a complete firewall ruleset, only the rules relevant to whitelist/blacklist IPsec traffic to the router.

Decision Flowchart

This technique will limit the total attack surface of your public facing IPsec VPN router. I know that all of my IPsec clients will be coming from one class A subnet (owned by one of the major wireless carriers) so I’ve added it to the ipsec-trusted-nets address list. The same technique can be used to whitelist/blacklist other protocols such as SSH.

If you found this articles useful please take a moment to ! Join the conversartion by writing a comment below or check my other Mikrotik Tutorials.

NetScout LinkRunner G2

LinkRunner G2 is the ultimate network cable test tool


CAT5 Cable Tester, Measure Cable Length,
PoE Voltage, Network Connectivity, Switch Port ID
Optional Wireless & Fiber Optics Modules
Check Price on Amazon

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.