We are looking to secure a bunch of ASP.Net 2.0 .asmx web services. The which will host the web services is already forms authenticated.
Is it possible to secure the
You should be able to use WSE to secure your service using forms authentication - though personally I've never had to do it.
Here are some resources using WSE:
To not use WSE you'd need to implement something like this as some of the other presponders have alluded to, though I'm not sure how reliable it would be: