Tag: Firewall
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A Hit Counter Doesn’t Know When It Started Counting
A rule that has matched nothing in nine minutes and a rule that has matched nothing in eighty days look exactly the same in the output. I wrote about that moment on LinkedIn; this post goes deeper into the toolchain around that observation: three small Perl tools written to consolidate a set of independently managed…
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When the Fix Becomes the Failure: ECMP, Zone Protection, and a 64KB Ceiling
Three ECMP firewall cutovers went cleanly. The fourth did not — and the cause turned out to be Palo Alto MSS clamping, hidden inside a zone protection profile that had passed through three clean rollouts undetected. It was the highest profile pair in the sequence, sitting at the data center boundary. The Setup The Baylor…