We have several clients unable to connect with NO visible error at the client.
At the ASA log the following error (713904|||IP = 18.104.22.168, Received encrypted packet with no matching SA, dropping) appears.
Each client is attempting to connect with a Verizon DSL line using client version 5. They are able to ping the ASA, but when attemptng to establish a connection the client set idle until it just stops attempting to connect. Each client is able to connect from other locations.