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Cisco ASA Series CLI Configuration Guide
Chapter 1 Configuring AnyConnect VPN Client Connections
Configuring AnyConnect Connections
[no] anyconnect ssl keepalive {none | seconds}
none disables client keepalive messages.
seconds enables the client to send keepalive messages, and specifies the frequency of the messages in
the range of 15 to 600 seconds.
The default is keepalive messages are enabled.
Use the no form of the command to remove the command from the configuration and cause the value to
be inherited:
In the following example, the ASA is configured to enable the client to send keepalive messages with a
frequency of 300 seconds (5 minutes), for the existing group-policy sales:
hostname(config)# group-policy sales attributes
hostname(config-group-policy)# webvpn
hostname(config-group-webvpn)#anyconnect ssl keepalive 300
Using Compression
Compression increases the communications performance between the ASA and the client by reducing
the size of the packets being transferred for low-bandwidth connections. By default, compression for all
SSL VPN connections is enabled on the ASA, both at the global level and for specific groups or users.
Note When implementing compression on broadband connections, you must carefully consider the fact that
compression relies on loss-less connectivity. This is the main reason that it is not enabled by default on
broadband connections.
Compression must be turned-on globally using the anyconnect ssl compression command from global
configuration mode, and then it can be set for specific groups or users with the anyconnect ssl
compression command in group-policy and username webvpn modes.
Changing Compression Globally
To change the global compression settings, use the anyconnect ssl compression command from global
configuration mode:
compression
no compression
To remove the command from the configuration, use the no form of the command.
In the following example, compression is disabled for all SSL VPN connections globally:
hostname(config)# no compression
Changing Compression for Groups and Users
To change compression for a specific group or user, use the anyconnect ssl compression command in
the group-policy and username webvpn modes:
anyconnect ssl compression {deflate | none}
no anyconnect ssl compression {deflate | none}
By default, for groups and users, SSL compression is set to deflate (enabled).
To remove the anyconnect ssl compression command from the configuration and cause the value to be
inherited from the global setting, use the no form of the command:
In the following example, compression is disabled for the group-policy sales:
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