No Route to Host

7 Dec 2025

1 min read

No route to host

$ python -c "import requests; requests.get('http://10.255.255.1')"
Traceback (most recent call last):
  ...
requests.exceptions.ConnectionError: Network is unreachable

Why this happens

Host is unreachable due to routing rules, VPN, firewall, or wrong subnet.

Fix

Verify network path, ping/traceroute, and firewall settings.

Wrong code

import requests
requests.get('http://10.255.255.1')

Fixed code

import requests
requests.get('http://10.0.0.5', timeout=5)