I'm interested in implementing CAC certs (like what the DoD uses) with Undertow but I'm not finding a lot of info right off.  Everyone I know who's using this is doing it via IIS.

I did find this nice guide, but it's for Wildfly:

Does anything like this exist but just for direct Undertow usage?  Or maybe someone can help me find the Undertow equivalents for the Wildfly configuration bits.  I'm just getting started into looking at this so any links are helpful.