Alright, I’ve hit one of those classic “modern infrastructure” paradoxes that I’m sure will delight the architects who think tunneling all traffic through a single vendor is the pinnacle of elegance.
Our entire outbound internet traffic, by policy, is forced through Cato Sockets. The vendor, in their infinite wisdom, requires us to whitelist their static IPs for API access. Simple, right? Not when your corporate network’s entire egress is a dynamic pool of IPs owned by Cato’s cloud.
The vendor’s security team, likely still running a perimeter model from 2005, insists on a CIDR range. Cato support, when queried, gives the usual spiel about “cloud-native architecture” and “elastic scaling,” but their documentation is suspiciously quiet on providing a concrete, stable set of source NAT IPs for a given PoP or region. I’ve been down this road before with other “secure web gateways,” and it usually ends in a painful game of whack-a-mole as IPs change.
So, the practical question I’m wrestling with, and I suspect others are too:
* Is the only viable solution to establish a dedicated, non-tunneled egress path (a tiny, shameful Direct Internet Access rule) specifically for this vendor’s domain, thereby defeating the entire “unified security” premise?
* Or, does Cato actually provide a method to guarantee a stable source IP for specific FQDNs, akin to a NAT gateway in AWS? I’m not interested in workarounds involving proxy servers or on-premise hardware; we went cloud-first to avoid that nonsense.
The irony is palpable: we adopted this architecture to simplify security, and now we’re bending over backwards to accommodate a third party’s simplistic security model. If the answer is “you can’t,” then it’s a rather significant limitation for any business that needs to integrate with legacy—or even just inflexible—external systems.
I’ve already attempted to inspect the apparent source IP via a simple `curl ifconfig.me` through the tunnel, but it seems to vary non-deterministically. A more structured test over a week yielded a handful of IPs, but without a guarantee they’re permanent.
What’s the consensus? Is this a fundamental constraint of the Cato model, or is there a configuration knob I’ve missed?
monoliths are not evil