I've been searching around this morning trying to figure out how to resolve my issue but nothing appears to suit my situation or solve my problem and so here I am.
I have a server running on CentOS Linux release 7.5.1804 (Core) and I have installed node v10.11.0 in order to host a website. I have a domain foo.ca whereby I have two separate web servers running (one for client, one for server). The client runs on port 3000, and I used iptables to forward port 80 to port 3000 so I can actually view my website without explicitly listing the port (i.e. by entering foo.ca in the address bar)
sudo iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 3000
This works fine, and I can see foo.ca
My problem arises when I try to access the server which is running on port 3001. I have enabled the port via tcp using firewall-cmd:
sudo firewall-cmd --zone=public --add-port=3000/tcp --permanent
sudo firewall-cmd --zone=public --add-port=3001/tcp --permanent
sudo firewall-cmd --reload
If I type foo.ca:3001 chrome tells me the site can't be reached, foo.ca took too long to respond.
I tested port 3001 via an online tool and it says that it is open, I also checked netstat:
netstat -tuplen
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State User Inode PID/Program name
tcp 0 0 127.0.0.1:27017 0.0.0.0:* LISTEN 995 12161 -
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 0 12066 -
tcp 0 0 0.0.0.0:3000 0.0.0.0:* LISTEN 1000 56647615 4926/node
tcp 0 0 0.0.0.0:3001 0.0.0.0:* LISTEN 1000 56671635 6195/node
Some online suggestions included using 0.0.0.0 rather than localhost but as you can see I already have that implemented. I don't really know what my options are at this point, I've tried enabling the port via iptables as well but I am not sure that did anything:
iptables -A INPUT -p tcp --dport 3001 -j ACCEPT
One last thing, my express server code is like so:
const express = require('express')
const app = express()
const port = 3001
app.get('/', (req, res) => res.send('Hello World!'))
app.listen(port, '0.0.0.0', () => console.log(`Example app listening on port ${port}!`))
And I run it like node test
Anyone have any ideas? I'm not much of a network guru
The solution was my network was blocking it for some reason