![]() ![]() Next we will describe how to enable SSL VPN on the firewall, and discuss how you can avoid a port conflict with ASDM (Web GUI management) when both are enabled on the same firewall interface.īoth SSL VPN and ASDM use the HTTPs protocol for communication which uses port 443 by default. The diagram below shows a high level network topology for SSL VPN connectivity:Īs you can see, the remote users can establish a secure SSL tunnel over the Internet and access application resources located in their central Enterprise LAN using a web browser (HTTPs). The applications that can be accessed by SSL VPN include Internal websites, Web-enabled applications, NT/Active Directory file shares, E-mail proxies, including POP3S, IMAP4S, and SMTPS, MS Outlook Web Access, and port forwarding access to some other TCP-based applications. On the other hand, SSL VPN provides limited application access compared with IPSEc VPN. ![]() ![]() Another difference is that IPSEc VPN provides full network connectivity to the central site for the remote user with the ability for the user to have full access to applications just like local LAN access. The main difference between IPSEc VPN and SSL VPN is that the first one requires a VPN client installed on the user’s computer while the SSL VPN requires only a secure browser (HTTPs). In addition to IPSEc VPN support, Cisco firewalls support also the SSL Web VPN technology for providing access to resources for remote users. Cisco SSL VPN and ASDM Configuration – Port Conflict ![]()
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