AX4200 port forwarding doesn't work in all cases

[darkshifty]

Hi all,

I've recently purchased a AX4200 and replaced my ISP's router to improve VPN, however I bumped into two major issues.
One of them is that I opened a SFTP and HTTPS port as I did in my previous router but it doesn't seem to work

If I connect locally to 192.168.100.100 with port 4400 via SFTP it's working, if I try to access it remotely through my home IP

sftp -v -P 4400 user@xx.xxx.xxx.xx

I receive the error:

ssh: connect to host xx.xxx.xxx.xx port 4400: Connection timed out

I just can't seem to figure what is blocking the access, the firewall IPv4 and IPv6 are active but there are no rules that seem to block any access. If I disable the firewall I still receive the mentioned error.

I am using the original firmware: 3.0.0.4.388_32271

 

[ColinTaylor]

Check the AiProtection log to see if that is blocking it.

Try disabling the firewall on 192.168.100.100. Also, if you have any VPN clients enabled temporarily turn those off.

 

[darkshifty]

Thanks for helping me ColinTaylor,
I've Disabled all VPN's, AiProtection was luckily off by default and the sFTP server doesn't have a firewall active (tripple checked it to be safe)

My guess would be something is up with the ISP settings I have defined in the router but I can't imagine port forwarding not to be working because of that.

 

[ColinTaylor]

You can check whether the port forwarding rule is enabled under System Log - Port Forwarding.

Turn off DoS protection in the router's firewall. Or perhaps try a different external port, like 51543.

 

[Ripshod]

4400 is a registered port. Ports 41952-65535 are free to use, so I second @ColinTaylor's suggested port