Linux GRE Tunnel Shell Script:
#!/usr/bin/env bash # Linux Point-to-Point GRE Tunnel Setup set -euo pipefail # 1. Create GRE tunnel interface sudo ip tunnel add gre01 mode gre remote 203.0.113.1 local 198.51.100.1 ttl 255 # 2. Assign tunnel IP address sudo ip addr add 10.0.0.1/30 dev gre01 # 3. Adjust MTU to accommodate 24-byte GRE encapsulation overhead sudo ip link set gre01 mtu 1476 # 4. Bring up tunnel interface sudo ip link set gre01 up echo "GRE Tunnel gre01 successfully established!" ip addr show gre01
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How to use GRE Tunnel Config Generator
- 1Configure your parameters in the input form.
- 2Inspect the instant client-side calculated results.
- 3Copy the generated command or config snippet.
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