https://errorzap.com/tags/networking/Recent content in Networking on Error ZapHugoen-usTue, 02 Jun 2026 00:00:00 +0000https://errorzap.com/posts/seven-network-gotchas-that-look-like-ghosts/Tue, 02 Jun 2026 00:00:00 +0000https://errorzap.com/posts/seven-network-gotchas-that-look-like-ghosts/The network isn’t haunted — it’s orphaned ports, stale DNS, and a firewall eating your return path. Run the checklist before you light the candles.https://errorzap.com/posts/the-99-access-points-that-didnt-exist/Fri, 29 May 2026 00:00:00 +0000https://errorzap.com/posts/the-99-access-points-that-didnt-exist/An inventory report swore a site had 99 access points; the ceiling said twelve, and the database had been lying the whole time.https://errorzap.com/posts/the-smart-blind-that-took-down-the-network/Thu, 28 May 2026 00:00:00 +0000https://errorzap.com/posts/the-smart-blind-that-took-down-the-network/A $30 Wi-Fi window blind decided it was the default gateway, and the whole site went dark whenever it felt like it.https://errorzap.com/posts/90s-kid-the-lan-party/Tue, 05 May 2026 00:00:00 +0000https://errorzap.com/posts/90s-kid-the-lan-party/You remember hauling your whole computer across town just to sit in a room and frag your friends.https://errorzap.com/posts/two-apps-one-port/Sat, 18 Apr 2026 00:00:00 +0000https://errorzap.com/posts/two-apps-one-port/Edits vanished, reads lied, and nothing in the logs was wrong — because two copies of the same app were quietly knife-fighting over the same TCP port.https://errorzap.com/posts/the-bot-that-hung-because-of-ipv6/Wed, 15 Apr 2026 00:00:00 +0000https://errorzap.com/posts/the-bot-that-hung-because-of-ipv6/A Telegram bot kept freezing on outbound calls with no error — turns out a NIC with IPv6 addresses but no working IPv6 routing was quietly killing every request.https://errorzap.com/posts/how-a-mesh-vpn-killed-my-ssh-jump-host/Sat, 11 Apr 2026 00:00:00 +0000https://errorzap.com/posts/how-a-mesh-vpn-killed-my-ssh-jump-host/The bastion broke every time an IP changed, so I deleted the bastion.https://errorzap.com/posts/the-speaker-that-caused-a-network-storm/Wed, 08 Apr 2026 00:00:00 +0000https://errorzap.com/posts/the-speaker-that-caused-a-network-storm/A wired network melting down at a customer site, traced to a pair of consumer speakers quietly braiding a layer-2 loop out of copper and mesh.https://errorzap.com/posts/the-firewall-api-call-that-wipes-your-router/Thu, 12 Mar 2026 00:00:00 +0000https://errorzap.com/posts/the-firewall-api-call-that-wipes-your-router/I ran a ‘harmless’ config script against a pfSense box and watched the entire firewall configuration evaporate in a single function call.