How can I forward web traffic from Mac to iPad?
I have a similar situation and resolved it by setting up a VPN client on the iPad so that it connects directly to those addresses.


The built in VPN client in IPSec mode works great with Cisco.
The L2TP works great with most standard commercial VPN solutions (like Meraki)
OpenVPN works with many consumer grade VPNs (like NetGear Orbi)


Doing this allows me to use the iPad directly with remote resources behind my company or home firewall.