Firewall Device Manager - DDNS Synology

[bwkpgi]

Hello,

I am using a Synology unit behind a Cisco Firewall Device Manager and am trying to use a domain for external access. It keeps telling me I have to open port 80 for Lets Encrypt to verify my domain. I am not sure how to do this. Would it be done under the Policies screen in access control? I am a newbie when it comes to this device so I do not want to break anything as we rely on the current setup for VPN between 2 production buildings. 

[ccieexpert]

https://www.reddit.com/r/synology/comments/uyv9gg/letsencrypt_without_publishing_port_80443/

the above link provides a workaround..

otherwise you would to have a static port address translation to allow port 80 inbound and only allow from a specific ip to be safe.. otherwise everybody would be scanning you and may hack into...

otherwise to allow port 80 :

https://www.petenetlive.com/KB/Article/0001680

only allow from the letstencrypt ip address..

[bwkpgi]

okay I will look into that. Thank you for the reply, I appreciate it.