After running a vulnerability scan on my Cisco 1921 router (IOS device) I got the following message back:
ISAKMP Allows Weak IPsec Encryption Settings
Apparently this service uses UDP on port 500. Can anyone tell me what it's for, why I need it or if I need it?
Additionally, if I do need it how do I change the setting to set strong encryption? If I don't need it how do I disable it?
I'm still fairly green when it comes to configuring a Cisco router so please pretend I'm dumb (not much of a stretch really).