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Cisco Anyconnect keeps disconnecting and reconnecting after 1 minute or so.

TweetyPie
Level 1
Level 1

Hi Guys,

 

Hopefully someone can help me, we are having numerous users (not all) having an issue whereby when they connect to VPN using Cisco Any-connect (Version 4.3.04030) it keeps dropping the connecting after 1 minute or so maybe even 1 minute 10 seconds.

The users that are experiencing problems are being connected via Transport protocol TLSv1.2 which keeps dropping the connection and reconnecting, the clients that are not having any issues are connected via DTLS and it is very stable.

please see attached DART logs we have captured , i am not sure what is causing this and why clients cannot connect with DTLS? below is also the webvpn gpo details.

 

webvpn
  url-list none
  filter none
  homepage none
  port-forward disable
  http-proxy disable
  sso-server none
  svc dtls none
  svc keep-installer installed
  svc keepalive none
  svc rekey time none
  svc rekey method none
  svc dpd-interval client none
  svc dpd-interval gateway none
  svc compression none
  svc modules none
  svc profiles none
  svc ask none default webvpn
  customization none
  http-comp none
  user-storage none
  storage-key none
  hidden-shares none
  smart-tunnel disable
  activex-relay disable
  file-entry disable
  file-browsing disable
  url-entry disable
  deny-message none

1 Reply 1

Rahul Govindan
VIP Alumni
VIP Alumni

You may be running into the issue as seen below:

https://www.cisco.com/c/en/us/support/docs/security/anyconnect-secure-mobility-client/116881-technote-anyconnect-00.html#anc5

 

This could be seen for clients that have DTLS blocked in the path. For clients that do not have DTLS blocked, they establish both TLS and DTLS tunnels successfully. Follow the workarounds given in the document to fix this.