Tcp

OpenWRT and PPTP VPN

2026-03-22 ·1 min read

Troubleshoot PPTP VPN connections on OpenWrt by installing NAT helper modules and configuring an nftables connection tracking helper.

2024-03-18 ·1 min read

Find which process is listening on a specific TCP port on macOS Big Sur or later using lsof and grep in Terminal.

2007-03-26 ·1 min read

Configure Windows XP to use DHCP with a static IP fallback, making it easier to move a laptop between home and work networks.