NGINX Reverse Proxy on GNS3 VM Not Accessible Externally on Custom Port 60000 #3653
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gns3@gns3vm:~$ apt show gns3-server
Package: gns3-server
Version: 2.2.50~focal3
Priority: extra
Section: net
Maintainer: GNS3 team <[email protected]>
Bugs: https://github.com/GNS3/gns3-server/issues
Installed-Size: 50.0 MB
Depends: python3, vpcs, ubridge (>= 0.9.14), qemu-system-x86, qemu-kvm, qemu-utils, mtools, cpulimit, libvirt-daemon-system, debconf (>= 0.5) | debconf-2.0, libc6 (>= 2.14), libgcc-s1 (>= 4.2)
Recommends: dynamips, x11vnc, xvfb
Enhances: gns3-iou
Download-Size: 8780 kB
APT-Sources: http://ppa.launchpad.net/gns3/ppa/ubuntu focal/main amd64 Packages
Description: GNS3 server |
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I’m encountering an issue with my NGINX reverse proxy setup on a GNS3 VM. The proxy works correctly when tested internally within the VM, but attempts to access it externally from my laptop result in a connection failure. I’ve verified that no additional firewalls are active in my topology. Below are the details of my configuration and the troubleshooting steps I’ve performed so far.
Setup Details:
Environment:
• Host Machine: MacBook (macOS)
• Virtualization: GNS3 VM
GNS3 GUI Details:
NGINX Configuration:
server { listen 60000 default_server; listen [::]:60000 default_server; server_name 10.10.10.111; location / { proxy_pass http://192.168.122.156:80; } }Ubuntu Server (Inside GNS3 via NAT 192.168.122.1) :
• IP Address: 192.168.122.156
• Service: NGINX serving on port 80
Issue Description:
• Internal Testing (Within GNS3 VM):
• Executing the following curl command successfully returns a 200 OK response:
Response:
HTTP/1.1 200 OK Server: nginx/1.24.0 (Ubuntu) Date: Wed, 30 Oct 2024 03:35:39 GMT Content-Type: text/html Content-Length: 615 Last-Modified: Sat, 28 Sep 2024 14:22:47 GMT Connection: keep-alive ETag: "66f81137-267" Accept-Ranges: bytes• External Testing (From Laptop):
• Attempting to access the proxy using the following curl command fails:
Error:
curl: (7) Failed to connect to 10.10.10.111 port 60000 after 23 ms: Couldn't connect to serverDiagnostics Performed:
Output:
● nginx.service - A high performance web server and a reverse proxy server Loaded: loaded (/lib/systemd/system/nginx.service; enabled; vendor preset: enabled) Active: active (running) since Tue 2024-10-01 01:50:58 UTC; 4 weeks 1 days ago Docs: man:nginx(8) Main PID: 70138 (nginx) Tasks: 9 (limit: 38401) Memory: 7.4M CGroup: /system.slice/nginx.service ├─70138 nginx: master process /usr/sbin/nginx -g daemon on; master_process on; ├─70139 nginx: worker process ├─70140 nginx: worker process ├─70141 nginx: worker process ├─70142 nginx: worker process ├─70143 nginx: worker process ├─70144 nginx: worker process ├─70145 nginx: worker process └─70146 nginx: worker process Warning: journal has been rotated since unit was started, output may be incomplete.sudo netstat -nlp | grep :60000Output:
Output:
Note: Port 60000 is not listed as open.
• UFW:
Output:
• iptables:
Output:
• Note: There are no active firewall rules blocking port 60000, and ufw is inactive.
Additional Information:
• According to netstat, NGINX is listening on port 60000 for both IPv4 (0.0.0.0:60000) and IPv6 (:::60000).
• However, nmap does not list port 60000 as open when scanned from within the VM.
• There are no other firewalls or security groups active in the current network topology that could be blocking access to port 60000.
• The GNS3 VM network settings are correctly configured to allow external access to the specified port.
Questions:
What I’ve Tried:
• Verified that NGINX is running and configured correctly to listen on port 60000.
• Confirmed that ufw is inactive and iptables does not block port 60000.
• Successfully accessed the internal server via curl within the VM.
• Confirmed that the port is listening using netstat.
• Attempted to scan ports with nmap, which did not show port 60000 as open.
• Reviewed the gns3-gui package details to ensure there are no related conflicts or dependencies affecting network configurations.
Looking For:
Advice on potential misconfigurations or overlooked settings that could prevent external access to the NGINX reverse proxy on a custom port within a GNS3 VM environment. Guidance on additional troubleshooting steps or configurations to resolve this connectivity issue would be highly appreciated.
Thank you in advance for your assistance!
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