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On-Premises Contrast Server won't start after changing port to 80 or 443 on Linux system

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Issue

On-Premises Contrast Server won't start after changing port to 80 or 443 on Linux system.

Cause

Ports below 1024 on Linux systems are considered privileged / system ports.

Resolution

Possible workarounds are:

  • Run the server as root (but this is generally not recommended, for security reasons)
  • Set up a reverse proxy (nginx, haproxy or similar)
  • Use port forwarding (see here for an example)

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