无法使用端口8080访问在Raspberry Pi上运行的Jenkins

Question

I'm trying to access my jenkins service running on port 8080 through my local network, but for some reason it is not allowing me to connect. I can remote into the pi and launch a web browser and type in localhost:8080 and it works fine.

This is a bare bones installation of raspbian and I have not installed a firewall on it, so not sure why I would not be able to access jenkins on my local network.

Answer 1

If this is true,

I can remote into the pi and launch a web browser and type in localhost:8080 and it seems to work fine.

you can focus on firewall/iptables/routing/ip configuration issues, so let's go ahead with those.

Let's say your Raspberry Pi has ip 192.168.0.10/24 and you are accessing from a device on the same network.

Firewall

You said it is dissabled, so we can forget about it.

Iptables

Check what rules you have

iptables -L

flush all of them for testing in case there's any

iptables -F

Routing

You are on the same network, so there shouldn't be problems here.

Ip Configuration

ping 192.168.0.10

Not working? Then check your configuration

route -n
ifconfig

Everything as it should? ping again while you execute

tcpdump -i eth0 -n #(or use whireshark if possible)

on both machines. You will be able to see there what's going on. What you can see there:

• Request is not being sent => most lickely missconfiguration on source
• Request is being sent and answer not => most lickely missconfiguration on dest
• Both are being sent, but answer is not recieved => missconfiguration of firewall on source or routing problem (probably not your case)

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If everything above works and is as it should, you then have to focus on the service running on the Pi. Is it listenning on every IP and accepting connections from anywhere (or at least your network)?

If not, change your configuration and you should be good and running.