Short version: per the docs, Edge needs no inbound access, including for remote work on the router's own panel.
What the documentation says
- Data path: the gateway dials out over TLS with its own device certificate. "Nothing on site needs to accept connections from the internet."
- Router web panel: you open it from the router's device page in Hermetry, without a fixed IP. There is no mention of port forwarding or a public address. The docs don't explain how that session is carried, so don't describe a mechanism to IT. You can quote the two statements above.
- Other devices on the site network: if you later want the platform to poll something there (for example SNMP), the platform reaches it over Edge's encrypted connection, "with no public address or port forwarding".
- Setup: claiming needs no credentials typed on site. Settings and signed firmware are pushed from Hermetry.
Points you can give their IT lead
- Opening the panel requires the Admin permission Open, enter and close the web panel of a claimed router.
- A Panel sessions list shows who opened panels. Viewing it is also Admin-only.
- There is a separate docs page, Remote access limits and audit. Read it before the meeting if they ask about logging.
- Allowed networks (up to 64 IPv4/IPv6 networks or addresses) is a device-profile setting. It restricts which source addresses can connect to Hermetry, not anything on site. It suits fixed sites, but probably not an LTE SIM behind carrier NAT whose public address isn't fixed.
Outbound rules The docs confirm MQTT over TLS on port 8883 (TLS 1.2 minimum, 1.3 preferred). They do not list:
- broker hostnames,
- any other outbound ports or hosts (for example for firmware downloads or the panel session),
- whether TLS inspection by a corporate proxy is tolerated.
Ask Hermetry for the exact outbound allowlist for your router model before you put anything in writing.
Sources
- Licensed gateways and Hermetry Edge
- Device transport security
- Gateways, polled devices and remote access
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