Subject:
simh VMS networking under Windows
From:
Alan Greig <greigaln@netscape.net>
Date:
Sat, 20 Aug 2005 17:17:26 GMT
Newsgroups:
comp.os.vms


If anyone wants to run VMS under Simh on Windows XP and give it access to the host PCs IP here's a little trick to do it without using an external NAT router - although it does need three network connections.

1) Connect Windows to broadband normally on one port (example USB)
2) Setup an ethernet card bound to IP protocol in Windows
3) Setup another ethernet card bound to nothing (untick IP, Client for etc)
4) Enable Windows Internet Connection sharing on the broadband connection with the local LAN set as the ethernet card bound only to IP.
5) Connect a crossover cable between the two ethernet ports
6) Attach XQ to the unbound Ethernet card in simh
7) Boot VMS and configure TCPIP via dhcp (static address in same subnet Windows uses for Shared LAN would probably work as well)
8) In Windows Firewall define any incoming services you want to reach VMS (ftp, telnet etc)

The surprising bit (to me!) is that Windows XP seems perfectly happy to perform NAT routing for non-Windows hosts. I had assumed Windows Internet Connection Sharing was proprietary but it seems to be straightforward dhcp and NAT.

-- 
Alan Greig