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Practical networking. Real-world experience. Routing, infrastructure, and ISP field notes from Justin Wilson.
Latest post Network Operations
BGP Graceful Shutdown
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BGP sessions can drop for many reasons. Dropping a session causes BGP to withdraw the routes learned through that neighbor. If it’s unexpected, this can cause congestion or other issues. The graceful shutdown option in BGP can…
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MikroTik and Cloudflare Zero Trust Part 2: Using WinBox Without Exposing Port 8291
In Part 1, we covered how to use Cloudflare Tunnel to protect MikroTik management access. We configured a connector inside the management network…
DNSSEC Validation and Deployment Planning for ISPs
When a signed domain has a broken chain of trust, a validating resolver returns SERVFAIL. ISP operators need enough resolver data to tell…
j2sw.com updated
j2sw.com has a new look! It was time for a refresh and a better way to bring my projects, writing, and other corners…
We’re Moving Blog Subscriptions to Jetpack: How to Sign Up and Manage Your Emails
We’re consolidating blog email subscriptions in Jetpack and phasing out Noptin and Subscribe to Category. Here’s how to sign up and manage delivery…
J2 Networks Joins MANRS to Strengthen Internet Routing Security
J2 Networks joins MANRS, the Mutually Agreed Norms for Routing Security initiative, reinforcing our commitment to a more secure Internet. MANRS is a…
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