u/ElderberryLexi

I spent the better part of last year helping a financial services firm with about 8,000 employees clean up the operational mess left by their SASE deployment. The platform had been running in production for eighteen months by the time I got there, and nobody had a definitive answer for what the current policy state actually was. Changes had been made directly in the admin console during incidents, never captured in a change ticket, and the vendor's "configuration history" feature showed timestamped diffs but had no approval workflow attached to it. During a routine audit, the compliance team found that several DLP policies had been silently modified three months earlier and there was no record of who authorized it.

What we ended up building was pretty close to what DevOps teams do with application infrastructure. Configurations got exported via API into a Git repository, a lightweight CI pipeline ran validation checks before any policy could be promoted, and a change ticket in their ITSM system became the required trigger for any production change. 

The part that took the longest was getting the network access policies, the cloud app control policies, and the DLP policies into the same workflow, because they lived in different admin panels with different API maturity levels. Two of the three had complete APIs; one required a combination of API calls and manual steps that we documented and enforced through process rather than automation. 

The audit findings closed out, and the team finally had a way to answer "what changed and who approved it" without digging through individual inboxes. Did anyone else end up having to build the versioning layer themselves rather than relying on what the vendor shipped?

edit: for those asking about rollback speed in production incidents, it depends entirely on whether your platform supports atomic policy swaps or applies changes incrementally

We're about 18 months into an SD-WAN deployment at a retail chain with 80 branches, and about 35 of them are still in hybrid state -- SD-WAN edges installed, running alongside MPLS circuits that are under contracts that don't expire for another 14 to 22 months. I won't pretend the hybrid operating period has been simple. We have two separate monitoring systems that need to be correlated during incidents, routing coexistence between the SD-WAN fabric and the legacy EIGRP environment took longer than anyone planned to get stable, and there are sites where the SD-WAN edge and the legacy CPE are both in the path in a way that makes troubleshooting calls genuinely annoying.

That said, the branches that have been fully migrated are noticeably easier to operate, and even the hybrid sites are delivering real benefits we didn't have before. Application-aware path selection means we stopped losing Teams calls every time a branch's primary circuit had a bad afternoon. We can see WAN performance across all 80 branches in one dashboard instead of five. The MPLS circuits that are still under contract are now cold standby rather than primary paths, which reduced our per-site bandwidth costs on those circuits. The thing that has made the hybrid period manageable is getting both the SD-WAN telemetry and the legacy network telemetry into the same observability platform early. Before we did that, incidents at hybrid sites were genuinely painful to triage. After, they're just normal incidents. Did anyone else find that unified observability was what made the coexistence period tolerable, or did you solve the two-dashboard problem differently.

we kept the official nginx image around longer than we should have. familiar, well-documented, easy to justify. but every pipeline run was flagging the same base layer findings and nobody was fixing them because they weren't "our" CVEs.

the question we eventually had to answer was whether we needed a general-purpose image at all or just something that runs the binary cleanly. for most production services the answer is the latter: fewer packages, less to scan, less to defend. what have teams here landed on for common infrastructure components like nginx, redis, or postgres?