Port forwarding doesn't work

[johnpoz]

@taylorswift ok that is good sign for sure!!! But maybe your isp blocks 443 and 80.. Do those ports same way.. Many an isp block 443 and 80 because part of their tos is can't run server/services, etc..

But you see traffic on that odd ball port is hope for sure.

[A Former User]

@johnpoz
I don't understand this... On port 80 the same results, but can you see me has different IP.

[johnpoz]

@taylorswift That is your traffic to and from the website.. You need to look for traffic to your IP on 443 and 80..

Make sure you like set the count of packets to like 0 or it could finish before you even send your traffic. And might be easier if you download and open in wireshark so easier to look for the specific traffic

here is where they sent to me on 443, I answer because I serve up something on 443.. But here you can see where they sent the syn to my public IP, and where I answer with syn,ack

Your going to want to make sure you see a syn to port 443 in your sniff.

[A Former User]

@johnpoz
I think I've got the point. My isp blocks ports 80 and 443. Tomorrow I'll try to do that on other port, but there might be problem with Let's Encrypt SSL.

[johnpoz]

@taylorswift doesn't matter if ssl is broken, doesn't matter if you have anything listening or anything.. If you send traffic to your IP on 443, then you should see it in the packet capture. If not then no port forward would never work.

See my edit from above.

[A Former User]

@johnpoz
I can't see 80 or 443 in packet capture, but on other ports I see. So if I run the website on, say, port 773, port forwarding won't work?

[johnpoz]

@taylorswift you could for sure use another port.. If you can see the traffic hit your wan, then you can forward it.. You could even forward it to something on 443.. keep in my for a user to access your site they would need to include your port..

http(s)://yourIPorfqdn:port

Browser used by some where http:// would use 80,. https:// would use 443.. If you want to use another port they would have to use the :port in their uri

I run a site on 44301 because it was just easier than messing with haproxy to do another service on 443.. I have openvpn listen on 443, if not vpn traffic it sends it to haproxy on 9443, which forwards to a backend service and does the ssl offload for it.

Vs messing with that setup, I put up a wrapperr thing for users to view their years stats on my plex server, was just easier to use different port.. And I send them a direct link ie https://fqdn:44301 that they just click on..

[A Former User]

@johnpoz
I also found out that port 8443, witch also is using for https I can see in packet capture, same as port 8080 for http.

[viragomann]

@taylorswift
Remember that Lets Encrypt with webroot needs access to port 80 to hand out certs.

[A Former User]

@viragomann
Is there a way to Let's Encrypt use other port?

[johnpoz]

@viragomann said in Port forwarding doesn't work:

access to port 80 to hand out certs.

Not really - just use dns to validate and get your certs. That is how I do it..

[viragomann]

@johnpoz
Yes, I know. I mentioned, this is with webroot identification, which is the default and widely used.

[johnpoz]

@viragomann said in Port forwarding doesn't work:

which is the default and widely used

Not for people that isp block inbound to 80 ;) like this guy..

[viragomann]

@johnpoz
I‘m in doubt, that his ACME client is knowing that.

[johnpoz]

@viragomann exactly..

[A Former User]

I'll ask my ISP can he open these ports.
Thank you @viragomann and @johnpoz for help.