Web Services: A Java™ Developer’s Guide Using E-Speak

9.6. Accessing a Service Outside a Firewall

Earlier, we mentioned that there are two firewall traversal scenarios possible. In the last few sections, we discussed accessing a service inside a firewall. There is also the outward-facing firewall traversal to facilitate. In this direction, services are located outside a firewall, and the service users are located inside the firewall of a company. Although the connector scenario would work for this, it is not required if the service is located in the public Internet and would be too heavy for such a deployment. However, we did mention that firewalls are concerned, to a lesser extent, with outward traffic. Hence, Web proxies and SOCKS servers are deployed to facilitate the outward HTTP or TCP traffic, ...