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We've seen lots of reconnects in dyndns both since midnight last night and during the day yesterday.
Steps:
Cradlepoint WAN quick blinking/no USB or WLAN LED. Cycled power to cradlepoint. USB now on; WAN blinking; external connection via dyndns still not up, though www.dyndns does show request; am able to ssh in with IP address; data acquisition has been running.
See in messages that router_check ran, now access via isfs4.dyndns is working.