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. Other ISPs can still make the same outbound connections. VPN connections on Brighthouse into the same IP block work fine, just outbound port 3306 is being blocked now. If anyone has details as to an emergency maintenance or change that occurred, I'd like to be able to pass it along to our customers. Thanks, Jared
----- 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.
Other ISPs can still make the same outbound connections. VPN connections on Brighthouse into the same IP block work fine, just outbound port 3306 is being blocked now.
If anyone has details as to an emergency maintenance or change that occurred, I'd like to be able to pass it along to our customers.
Speculation: are these residential class cablemodem customers? Carriers are prone to block uncommon ports on such modems at random. Cheers, -- jra -- Jay R. Ashworth Baylink jra@baylink.com Designer The Things I Think RFC 2100 Ashworth & Associates http://baylink.pitas.com 2000 Land Rover DII St Petersburg FL USA #natog +1 727 647 1274
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? Jeff
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.
participants (3)
-
Jared Geiger -
Jay Ashworth -
Jeff Kell