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Hello, I just got this router.
Haha, I am a novice so please be easy with me 
On my Edgerouter, I have default firewall rules to prevent unwanted traffic from WAN coming in.
Would you please help me set up the same rules on ER605?
Any info would be very much appreciated. Thanks!!
Dear @Buxtehude ,
Buxtehude wrote
On my Edgerouter, I have default firewall rules to prevent unwanted traffic from WAN coming in.
Would you please help me set up the same rules on ER605?
This router is a NAT device, by default it can not actively access the LAN from the WAN side as long as you have not set advanced settings such as port forwarding.
Please check the similar post to get more details: https://community.tp-link.com/en/business/forum/topic/520224
Best Regards!
@Hank21 Thank you so much! Your answer made me read more about how firewalls work in general.
So I have two more beginner questions.
Dear @Buxtehude ,
I'm sorry I don't know much about the Edgerouter.
This router is using symmetric NAT, which is used to improve security in addition to IP translation.
You can check the working mechanism of NAT by Google etc.
Best Regards！
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