'Can not connect with a simple http server(tcp connection) on oracle compute instance(oci), ssh connection works well
I am using oracle cloud to create a http server for learning , so I am new on this. Thank you for your any help!
Instance information
Image: Canonical-Ubuntu-20.04-2022.02.15-0
Shape: VM.Standard.E2.1.Micro
Have added ingress rule on subnet(7500 port): Picture of subnet
Source IP Protocol Source Port Range Destination Port Range Allows
0.0.0.0/0 TCP All 7500 TCP traffic for ports: 7500
Using python to create a http server:
python3 -m http.server 7500 &
It was showing：
ubuntu@tcp-server:~$ Serving HTTP on 0.0.0.0 port 7500 (http://0.0.0.0:7500/) ...
Calling lsof -i returns
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
python3 1806 root 3u IPv4 33281 0t0 TCP *:7500 (LISTEN)
Allowed 7500 port on ufw:
ufw Status: active
To Action From
7500 ALLOW Anywhere
7500 (v6) ALLOW Anywhere (v6)
But I can not visit public_Ip_address:7500.
Using telnet:
sudo telnet 152.69.123.118 7500
Returns:
Trying 152.69.123.118...
and does not connect
Thank you in advance!
Solution 1:[1]
The reason is from iptables setting:
sudo nano /etc/iptables/rules.v4
add this sentence: -A INPUT -p tcp -m state --state NEW -m tcp --dport 7500 -j ACCEPT
then:
sudo su
iptables-restore < /etc/iptables/rules.v4
Done!
ubuntu image from oci has been modified by oracle, the default setting has limitted ports accepted. Therefor we have to open the port manually.
Sources
This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.
Source: Stack Overflow
| Solution | Source |
|---|---|
| Solution 1 | Hakunann |