Will Bonded Fusion get in the way of AT&T Microcell?

[tbessie]

Hi folks...

I just had bonded fusion installed, and since then, my AT&T MicroCell can't seem to finish it's connection cycle to AT&T.

I was wondering if the ZyXel P-663HN-51 modem/router firewall setup is, by default, blocking the ports needed.

The MicroCell manual says:

Firewall Specifications
System Administrators (Business Customers): Installing the 3G MicroCell behind a firewall, or behind a router with firewall
capabilities, requires the following ports be opened to prevent the firewall from blocking communication with the network.
This type of installation is typically found in corporate environments.
123/UDP: NTP timing (NTP traffic)
443/TCP: Https over TLS/SSL for provisioning and management traffic
4500/UDP: IPSec NAT Traversal (for all signaling, data, voice traffic)
500/UDP: IPSec Phase 1 prior to NAT detection (after NAT detection, 4500/UDP is used)
4500/UDP: After NAT detection, 4500/UDP is used

Another thing, however, that I did was to upgrade my home-router's firmware, so that might be causing this as well.

I have the following setup:

SonicModemInBridgeMode <-> HomeRouter <-> Switch <-> MicroCell

Has anyone had any troubles with that setup and an AT&T MicroCell?

- Tim

[tbessie]

Ah, nevermind people - it turned out I just needed to turn on IPSec Passthrough on my own home router - no modifications needed on the Sonic modem/router.

For some reason, although IPSec Passthrough had been disabled before I upgraded my home router's firmware, it needed to be enabled now for the MicroCell to work (the MicroCell sends encrypted packets back and forth to AT&T, possibly with VPN). The AT&T drone tried to be helpful when I called them up, but they mostly just told me to plug/unplug things; they got uncomfortable when I tried to explain to them my home network topology (I don't think they ever even heard the phrase "network topology" :-/ ).

Anyway, I thought I'd post my solution here in case anyone else ever has the same problem.

- Tim