Back to feed
Dev.to
Dev.to
7/16/2026
The original title is about a WireGuard tutorial showing both encrypted and cleartext perspectives of the same ping.

The original title is about a WireGuard tutorial showing both encrypted and cleartext perspectives of the same ping.

Original: WireGuard, Seen From Both Sides: The Same Ping as Ciphertext and Cleartext

Short summary

A hands-on Protocol Lab tutorial that builds a WireGuard tunnel between two nodes and demonstrates the dual perspective of encrypted and cleartext traffic. Capturing the underlay interface shows only UDP/51820 ciphertext, while the tunnel interface reveals the decrypted ICMP packets. The lab covers peer identification via public keys, overlay/underlay concepts, and references the relevant RFCs for WireGuard's cryptography stack.

  • •Hands-on lab builds a WireGuard tunnel and captures traffic from both underlay and overlay perspectives
  • •Underlay shows only encrypted UDP/51820; tunnel interface shows cleartext ICMP
  • •Covers peer identification, overlay/underlay concepts, and references RFCs 7748, 8439, and the WireGuard whitepaper

Generated with AI, which can make mistakes.

#open-source
Read full article at Dev.to

Is this a good recommendation for you?

Comments

Failed to load comments. Please try again.

Explore more

The original title is "VXLAN Explained: An Overlay You Can Read on the Wire"
Dev.to
The original title is: "One TCP Connection, From SYN to FIN: Capture the Whole Lifecycle in tcpdump"
Dev.to
Debugging WireGuard VPN on GCP: NAT IP Mismatch and Linux rp_filter Packet Drops
Dev.to
Lab 12 - Telnet and SSH ( I Captured My Own Password in Wireshark — Here's What Telnet Taught Me About Network Security )
Dev.to