We do not provide Clientless VPN support for Java, auto applet download, smart tunnels, plug-ins, port forwarding, and e-mail proxy for mobile devices, except Citrix Receiver for Mobile.You can continue to use the ASA to support AnyConnect 4.x mobile clients for platforms that are not yet supported on 4.6.Browser-based Clientless SSL VPN is not supported on Apple iOS and Android devices. On Mac OS X, Apple’s JRE is supported.Web browsers supported by clientless (browser-based) SSL VPN access to ASAs Releases 8.0(2) and later.IPsec clients supported for VPN access to the ASA.ASA Releases 8.0–8.2 support clientless SSL VPN sessions originating from the following OSs and browsers.When launched as a standalone client, AnyConnect supports any browser.The following sections identify other clients, beyond the Cisco AnyConnect client, that connect to the ASA.Lotus Domino Web Access (DWA) 8.5 and 8.5.1Cisco AnyConnect Secure Mobility Client 4.5 supports the following operating systems.Smart tunnel is supported on x86 and x64 architectures only; Itanium and Power PC architectures are not supported.Citrix HTML5 Receiver Version 1.6 with StoreFront 2.5, Version 1.7 with StoreFront 3.0, and Version 1.9 with StoreFront 3.5.See the Release Notes for Cisco AnyConnect Secure Mobility Client, Release 3.1 for OS requirements and support notes.The ICA plug-in does not support XenDesktopUsers running macOS 10.13 (High Sierra) with a version of AnyConnect earlier than 4.5.02XXX must enable the AnyConnect software extension in their macOS Preferences -> Security & Privacy pane.
Cisco AnyConnect 4.8.00175 is the first version that officially supports operation on macOS Catalina and contains no 32-bit code.The following application notes apply to clientless SSL VPN on ASA Release 9.3:Smart tunneling is not intended to restrict network access to only internal resources.Microsoft SharePoint 2010 and 2013Smart tunnel does not support Linux.Users running macOS 10.13 (High Sierra) with a version of AnyConnect earlier than 4.5.02XXX must enable the AnyConnect software extension in their macOS Preferences -> Security & Privacy pane.
Note: Download the AnyConnect VPN Webdeploy package (anyconnect-win*.pkg or anyconnect-macos*.pkg) from the Cisco Software Download (registered customers only). Smart tunnel on macOS 10.14 and 10.15 is no longer supported due to operating system limitations.Microsoft-supported versions of Windows 10 for ARM64-based PCs.
And where can I get it if I don't have it? You may need to manually reboot after enabling the extension prior to AnyConnect 4.5.02xxx.Version 2.5 for Citrix 7.5, Version 3.0 for Citrix 7.6, and Version 3.5 for Citrix 7.8.Active support and testing with the latest ASA release is limited to three major versions of each operating system and browser, typically the current version and the previous two versions.