On Tue, Jul 30, 2013 at 8:02 PM, Jeff Kell <jeff-kell@utc.edu> wrote:
On 7/30/2013 10:55 PM, Jay Ashworth wrote:
----- Original Message -----
From: "Jared Geiger" <jared@compuwizz.net>
We are seeing that all our customers in the Brighthouse Orlando, FL market that would make outbound connections on TCP port 3306 suddenly can't connect to us now. This happened suddenly mid day today.
Speculation: are these residential class cablemodem customers? Carriers are prone to block uncommon ports on such modems at random.
Yeah, 3306 is MySQL. Overly-paranoid firewall somewhere? DDoS mitigation collateral damage?
I routed around nlayer>TWC>Brighthouse to Cogent>XO>Brighthouse and problem was resolved. So the first path has something wonky. The reverse path is BHN>Level3>Inforelay>Me. So my guess is there is something in nlayer or TWC 7843 that is filtering/limiting it.