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When I use Datagram Transport Layer Security (DTLS) on AnyConnect VPN tunnel, I cannot download large files and have connectivity issues. How can I resolve this issue?

April 26, 2017anyconnect Datagram download dtls large security transport tunnel VPN

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When I use Datagram Transport Layer Security (DTLS) on AnyConnect VPN tunnel, I cannot download large files and have connectivity issues. How can I resolve this issue?

1 Answer

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A. Make sure that the UDP port is not blocked as this port is used by DTLS. Also, check if DTLS is not blocked or dropped by ISP. Enable DTLS on the interface that you are connecting to from the AnyConnect. For more information on enabling DTLS, refer to Enabling Datagram Transport Layer Security (DTLS) with AnyConnect (SSL) Connections.