05-29-2012 09:55:48 AM
I have an AT&T Microcell that workked fine until I installed my new Asus RT-N56U router. Since then I have received a blinking red, 3G light that will not correct despite powering up/down all netwrok devices (Comcast cable modem, Asus router and AT&T Microcell) and de-activating/re-activating the Microcell...no luck. Any specific router configurations or other ideas? Thanks.
05-29-2012 01:22:53 PM
Firewall settings on the router perhaps?
From the MC user manual:
Installing the 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.
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
Here's the PDF of the full manual: http://www.wireless.att.com/support_static_files/K
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07-13-2012 06:02:55 AM
I ran into this same issue.
If you want to try a quick test, figure out the Microcell's IP address (by matching it to the MAC address) and place the Microcell into the DMZ of the router. If the Microcell connects to AT&T, then it is the port/firewall problem that jamileh outlines above. (DO NOT leave the device exposed like this, however...this is only intended to be a quick test. Remove it from the DMZ once you verify it works or not).
One additional setting if the IPsec tunnelling. I do not know if it's required, but I set it to be allowed on the Asus router.