I am currently running wingate 6.1.4 on a P4 2Ghz w/512 MB DDR and have been experiencing performance problems using the WGIC since I first began using it almost 2 years ago. Multiple wingate upgrades later the performance is still an issue. Using NAT is relatively quick but using WGIC slows internet performance on client machines to a crawl.
In addition, the WGIC interferes with some applications which require local network access even after we have removed them from WGIC using the exception list (set for local network access for the affected application). In most cases we have to disable the WGIC when we need to use those affected applications.
I need to improve the performance and resolve the WGIC issues (or get an acceptable replacement which provides transparent authentication) or I will be forced to change my internet sharing application.