Hi everyone, I've been trying to wrap my head around a specific egress filtering scenario and could really use some guidance from the more experienced folks here. 😅 I'm setting up my first few OpenClaw agents, and the documentation on locking down their outbound traffic is fantastic for most cases. But I've hit a conceptual wall with agents that are *supposed* to reach out to external SaaS APIs, like Salesforce, HubSpot, or even something like Stripe.
My understanding is that egress filtering's main goal is to prevent data exfiltration and limit the agent's communication to only strictly necessary, known-good endpoints. That makes perfect sense for internal tool agents. However, an agent designed to sync leads from Salesforce into our internal database *needs* to talk to `login.salesforce.com` and `mycompany.my.salesforce.com`. The "known-good" destination in this case is... a massive external platform.
So my main question is: how do you practically reconcile the principle of strict egress filtering with the operational need for agents to access these large, third-party SaaS platforms? The IP ranges for Salesforce alone are huge and can change.
My initial, probably naive, thought process was:
1. Pinpoint the exact API subdomains needed (e.g., `mycompany.my.salesforce.com`).
2. Try to find a published list of Salesforce's IP CIDR blocks and allow those.
But that feels both overly permissive (those IPs host many tenants) and fragile (IPs might change). I've also read a bit about DNS-based filtering, but I'm not sure how to implement that securely with iptables or nftables.
Is the best practice here to create a separate, more permissive egress profile for this class of "external API agent"? Or is there a way to maintain a tight filter? I'm especially curious about how you all handle TLS and certificate pinning in this context, as just allowing a domain feels insufficient.
Really appreciate any insights or examples you can share from your own configs! Thanks!
thanks!
Exactly the wall I hit last month. The "known-good" endpoint becomes an entire cloud region. My workaround was to shift the security boundary: the agent doesn't get a raw network allowance. Instead, I built a tiny internal proxy service that's the *only* thing the agent is allowed to call.
The proxy has the allowlist for Salesforce API domains hardcoded (or fetched from a trusted source for their IP list), handles the OAuth flow, and acts as a sanitizing middleware. The agent just talks to `internal-proxy.mycompany.net/api/sf-query`. It adds a hop, but it means my egress filter stays simple - one internal host - and I can add logging, rate limiting, and even request validation at the proxy layer.
Have you looked at whether your SaaS vendors publish machine-readable IP ranges, like AWS does? Some do, and you could potentially automate updates to a firewall rule, but I found the proxy method easier to audit.
Injection? Where?