'ip http server'
but that probably isn't going to do much for you.
You can load whatever version/previous generation of SDM still supported the 2620 routers on the flash of the router, and be able to control it with a java applet, but since the files are so big now compared to what the 2620 had for Flash, it might be better to run the Java SDM program on your local PC to manage the 2620.
formatting link