Por vezes torna-se difícil obter as versões do VPN Client da Cisco, deixo-vos o link onde são disponibilizadas as seguintes versões:
VPN client 5.0.06.0160 Windows 2000/XP/Vista
vpnclient-win-msi-5.0.06.0160-k9.exe
VPN client 4.8 for Windows 98/Me
vpnclient-win-is-4.8.00.0440-k9.exe
VPN client 4.9 Mac (Mac OS 10.4.* and 10.5)
vpnclient-darwin-4.9.01.0080-universal-k9-5-10.dmg
VPN client 4.8.00.0490 for Mac (< mac 10.4 )
vpnclient-darwin-4.8.00.0490-GUI-k9-5-10.dmg
VPN client 4.8.00.0490 for Linux
vpnclient-linux-x86_64-4.8.00.0490-k9.tar.gz
AnyConnect (32 bit) client 2.5 Linux
anyconnect-linux-2.5.0217-k9.tar.gz
AnyConnect (64 bit) client 2.5 Linux
anyconnect-Linux_64-2.5.0217-k9.tar.gz
http://www.4shared.com/folder/RSMWutlZ/Cisco.html