On 11/30/17, 9:26 PM, "cctech on behalf of william degnan via cctech" <cctech-boun...@classiccmp.org on behalf of cct...@classiccmp.org> wrote:
>I have a microvax set up with VMS 5, running MULTINET (and decnet >locally). The server has a FQDN and after a while being exposed to the >WWW someone out there started using the server as an SMTP relay. I can >disable and clear the queue, but I'd like to block entirely this from >happening in the first place. I'd like to learn more about how this >happens in VMS. > >Anyone have had this same problem before? I realize back when VMS 5 was >current it was not so much of an issue, but today it is. I am working on >a >solution. I can envision a few ways including blocking the smtp relay >port >from the firewall, but if possible I'd like to set up a VMS Multinet >solution as a learning exercise. > >I am open to suggestions, and once I find the solution I'll post it. > >I understand that this kind of thing is not cookie cutter, there are >different levels one could address something like this. I have a comcast >business router, and one of the 5 IPs I have is NAT assigned to the >internal 10.1.10 port of the microvax. > >This is the same machine I wrote about previously as with then, thanks for >your help. I find the best way to learn is on the actual hardware warts >and all. > >Bill Look at the SMTP_SERVER_REJECT file example here: http://www.process.com/docs/multinet5_4/admin_guide/Ch15.htm. It¹s a set of rules that decide whether a message gets rejected (rule ending in ³y²) or let through (rule ending in ³n²). You¹d normally set this up to first let through those emails you want, then reject everything else at the end of the rules file. >
