[HECnet] DECnet over IP

Robert Armstrong bob at jfcl.com
Wed Jan 20 08:00:11 PST 2016


>Even random IP addresses, or just random ports?

  Passive connections don't care about the incoming port or IP.  In fact, Fred and I accidentally proved this a couple of times when my ISP changed my IP.  As long as I had Fred's correct IP on my active end, Fred's passive end didn't care what my IP was.

  BTW, if exploited properly, that property could come in handy for people with dynamic IPs.

  And along those same lines, for /TCP=LISTEN circuits, the /REMOTE=ip modifier is ignored.

> you can set passwords on circuits.

  Well, that might work with TCP circuits then.  That'd at least give you some simple password authentication.  I suspect DECnet sends passwords in clear text, though, so it'd be only trivially secure.

  As for DDoS attacks on my DECnet port, it's not something I'm going to lose sleep over....

Bob




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