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Archive of posts filed under the worksforme category.

Run cron job every N days

It's easy with modular arithmetic.

GRE bridging, IPsec and NFQUEUE

Playing around with tunneling.

Send email with attachment(s) from script or command line

To avoid having to search it every single time.

SSH auto-reconnect

Not a big issue, but it's easy to make it better.

Firewall HA with conntrackd and keepalived

Firewall failover without losing stateful connection tracking