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Archive of posts filed under the networking category.

iptables debugging

Using the raw table with the TRACE target

OCSP verification with OpenSSL

How to perform simple OCSP queries from the command line

Controlling client-to-client connections in OpenVPN

To do that, do NOT use client-to-client in the configuration file!

Tun/Tap interface tutorial

How tun/tap works in Linux, with sample code

“Jump in” with ssh and netcat

How to do those two hops in a single step