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Keepalive Messages, Client Profile to Download, Optional Client Module to Download, Internet Explorer. - firewall

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Chapter 3 Installing the AnyConnect Client and Configuring the Security Appliance with ASDM • Keepalive Messages-Enter an number, from 15 to 600 seconds, in the Interval field to enable and adjust the interval of keepalive messages to ensure that an connection through a proxy, firewall, or NAT device remains open, even if the device limits the time that the connection can be idle. Adjusting the interval also ensures that the client does not disconnect and reconnect when the remote user is not actively running a socket-based application, such as Microsoft Outlook or Microsoft Internet Explorer. • MTU-Adjust the Maximum Transmission Unit (MTU) in bytes, from 256 to 1406 bytes. This setting affects only the AnyConnect client connections established in SSL, with or without DTLS. By default, the MTU size adjusts automatically based on the MTU of the interface that the connection uses, minus the IP/UDP/DTLS overhead. • Client Profile to Download-Specify a file on flash as a client profile. A profile is a group of configuration parameters that the AnyConnect Client uses to configure the connection entries that appear in the client user interface, including the names and addresses of host computers. • Optional Client Module to Download-Specify any modules that the AnyConnect client needs to download to enable more features, such as Start Before Logon (SBL). To minimize download time, the AnyConnect Client requests downloads (from the security appliance) only of core modules that it needs for each feature that it supports. The attributes you configure on the Group Policies > Advanced > SSL VPN Client dialog box set the profile for the AnyConnect Client. 3-10 Cisco AnyConnect VPN Client Administrator Guide OL-12950-012

Section	Page
About This Guide 7	3
chapter 1	3
Introduction 1	3
chapter 2	3
Common AnyConnect VPN Client Installation and Configuration Procedures 1	3
chapter 3	4
Installing the AnyConnect Client and Configuring the Security Appliance with ASDM 1	4
chapter 4	4
Installing the AnyConnect Client on a Security Appliance Using CLI 1	4
chapter 5	4
Configuring AnyConnect Features Using ASDM 1	4
chapter 6	4
Configuring AnyConnect Features Using CLI 1	4
chapter 7	5
Configuring and Using AnyConnect Client Operating Modes and User Profiles 1	5
chapter 8	5
Customizing and Localizing the AnyConnect Client 1	5
chapter 9	5
Monitoring and Maintaining the AnyConnect Client 1	5
appendix A	5
Sample AnyConnect Profile and XML Schema 1	5
appendix B	6
Using Microsoft Active Directory to Add the Security Appliance to the List of Internet Explorer Trusted Sites for Domain Users 1	6
Index	6
About This Guide	7
Document Objectives	7
Audience	7
Related Documentation	8
Document Organization	8
Document Conventions	9
Obtaining Documentation, Obtaining Support, and Security Guidelines	10
Licensing	10
Introduction	11
AnyConnect Client Features	11
Remote User Interface	12
Getting and Installing the Files You Need	17
CSA Interoperability with the AnyConnect Client and Cisco Secure Desktop	17
Common AnyConnect VPN Client Installation and Configuration Procedures	19
Installing the AnyConnect Client	19
Before You Install the AnyConnect Client	20
Ensuring Automatic Installation of AnyConnect Clients	20
AnyConnect Client and New Windows Installations	21
Adding a Security Appliance to the List of Trusted Sites (Internet Explorer)	21
Adding a Security Certificate in Response to Browser Security Alert Windows	22
Replacing a Digital Certificate with a Trusted Certificate	25
Installing the AnyConnect Client on a User’s PC	26
Where to Find the AnyConnect Client Files to Install	26
Installing the AnyConnect Client Using the Microsoft Windows Installer on a PC Running Windows	26
Installing the AnyConnect Client on a PC Running Linux	27
Installing the AnyConnect Client on a PC Running MAC OSX	27
Installing the AnyConnect Client and Configuring the Security Appliance with ASDM	29
Installing the AnyConnect Client on a Security Appliance Using CLI	39
Enabling AnyConnect Client SSL VPN Connections Using CLI	40
Disabling Permanent Client Installation	42
Configuring AnyConnect Features Using ASDM	43
Enabling Datagram Transport Layer Security (DTLS) with AnyConnect (SSL) Connections	43
Configuring DTLS	44
Prompting Remote Users	46
Enabling IPv6 VPN Access	47
Enabling Modules for Additional AnyConnect Features	47
Configuring, Enabling, and Using Other AnyConnect Features	48
Configuring Certificate-only Authentication	48
Using Compression	51
Changing Compression Globally	52
Changing Compression for Groups and Users	52
Enabling AnyConnect Keepalives	53
Enabling AnyConnect Rekey	54
Enabling and Adjusting Dead Peer Detection	56
Configuring the Dynamic Access Policies Feature of the Security Appliance	57
Cisco Secure Desktop Support	57
Configuring AnyConnect Features Using CLI	59
Enabling Datagram Transport Layer Security (DTLS) with AnyConnect (SSL) Connections	59
Enabling DTLS Globally for a Specific Port	60
Enabling DTLS for Specific Groups or Users	60
Prompting Remote Users	60
Enabling IPv6 VPN Access	61
Enabling Modules for Additional AnyConnect Features	62
Configuring, Enabling, and Using Other AnyConnect Features	63
Configuring Certificate-only Authentication	63
Using Compression	63
Configuring the Dynamic Access Policies Feature of the Security Appliance	64
Cisco Secure Desktop Support	64
Enabling AnyConnect Rekey	64
Enabling and Adjusting Dead Peer Detection	65
Enabling AnyConnect Keepalives	66
Configuring and Using AnyConnect Client Operating Modes and User Profiles	67
AnyConnect Client Operating Modes	67
Using the AnyConnect CLI Commands to Connect (Standalone Mode)	67
Connecting Using WebLaunch	69
User Log In and Log Out	70
Logging In	70
Logging Out	70
Configuring and Using User Profiles	70
Enabling AnyConnect Client Profile Downloads	71
Configuring Profile Attributes	76
Enabling Start Before Logon (SBL) for the AnyConnect Client	77
XML Settings for Enabling SBL	77
CLI Settings for Enabling SBL	77
Configuring the ServerList Attribute	78
Configuring the Certificate Match Attribute	78
Certificate Key Usage Matching	78
Extended Certificate Key Usage Matching	79
Certificate Distinguished Name Mapping	79
Certificate Matching Example	81
Customizing and Localizing the AnyConnect Client	83
Customizing the End-user Experience	83
Language Translation (Localization) for User Messages	85
Understanding Language Translation	85
Configuring Language Localization Using ASDM	86
Creating or Modifying a Translation Table Using ASDM	88
Import/Export Language Localization	89
Creating or Modifying a Translation Table Using CLI	90
Monitoring and Maintaining the AnyConnect Client	95
Viewing AnyConnect Client and SSL VPN Sessions	95
Adjusting MTU Size Using ASDM	96
Adjusting MTU Size Using CLI	96
Logging Off AnyConnect Client Sessions	97
Updating AnyConnect Client and SSL VPN Client Images	98
Sample AnyConnect Profile and XML Schema	99
Sample AnyConnect Profile	99
Sample AnyConnect Profile Schema	101
Using Microsoft Active Directory to Add the Security Appliance to the List of Internet Explorer Trusted Sites for Domain Users	113
Index	115
A	115
C	115
D	115
E	115
F	115
G	116
I	116
K	116
L	116
M	116
N	116
O	116
P	117
R	117
S	117
T	117
U	117
V	118
W	118

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3-10

Cisco AnyConnect VPN Client Administrator Guide

OL-12950-012

Chapter 3

Installing the AnyConnect Client and Configuring the Security Appliance with ASDM

•

Keepalive Messages

—Enter an number, from 15 to 600 seconds, in the Interval field to enable and

adjust the interval of keepalive messages to ensure that an connection through a proxy, firewall, or

NAT device remains open, even if the device limits the time that the connection can be idle.

Adjusting the interval also ensures that the client does not disconnect and reconnect when the remote

user is not actively running a socket-based application, such as Microsoft Outlook or Microsoft

Internet Explorer.

•

MTU

—Adjust the Maximum Transmission Unit (MTU) in bytes, from 256 to 1406 bytes. This

setting affects only the AnyConnect client connections established in SSL, with or without DTLS.

By default, the MTU size adjusts automatically based on the MTU of the interface that the

connection uses, minus the IP/UDP/DTLS overhead.

•

Client Profile to Download

—Specify a file on flash as a client profile. A profile is a group of

configuration parameters that the AnyConnect Client uses to configure the connection entries that

appear in the client user interface, including the names and addresses of host computers.

•

Optional Client Module to Download

—Specify any modules that the AnyConnect client needs to

download to enable more features, such as Start Before Logon (SBL). To minimize download time,

the AnyConnect Client requests downloads (from the security appliance) only of core modules that

it needs for each feature that it supports.

The attributes you configure on the Group Policies > Advanced > SSL VPN Client dialog box set the

profile for the AnyConnect Client.