How to configure Jenkins to run on port 80

Question

I\'m running Ubuntu 11.10 and have run sudo apt-get install jenkins to install Jenkins on this system.

I\'ve seen some tutorials on how to setup a rever

Answer 1

I had the same problem and I found the best solution to it using iptables.

By default Jenkins runs on ports 8080 or 8443. And HTTP/HTTPS servers run on ports 80 and 443.

But this is these are the special ports and the process using them must be owned by root.

But running Jenkins as root is not the best solution(it should be run as its own user) and so does to run Jenkins with a web server such as Apache, and let it proxy requests to Jenkins

The best solution is to use iptables on Linux to forward traffic.

1) Use this command to list the current iptables configuration:

$ iptables -L -n

target     prot opt source               destination
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0            tcp dpt:8443
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0            tcp dpt:8080
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0            tcp dpt:443
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0            tcp dpt:80

2) If you don't see above entries, then you need to run below commands:

sudo iptables -I INPUT 1 -p tcp --dport 8443 -j ACCEPT

sudo iptables -I INPUT 1 -p tcp --dport 8080 -j ACCEPT

sudo iptables -I INPUT 1 -p tcp --dport 443 -j ACCEPT

sudo iptables -I INPUT 1 -p tcp --dport 80 -j ACCEPT

3) Now re-run the $ iptables -L -n command and verify that you are seeing 1st step o/p.

4) The final step is to run the below commands to forward port 80 traffic to 8080, and port 443 traffic to 8443(if you are using HTTPS).

sudo iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 8080

sudo iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 443 -j REDIRECT --to-port 8443

5) Now your URL should stay on port 80

You can find the more details here.