dbster's profile

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23 Messages

Friday, September 19th, 2025 9:09 PM

Port forwarding to an old DEC VAX machine with no wifi or DHCP

Comcast modem part number TG02DCW4482CT 

https://www.xfinity.com/support/articles/xfi-port-forwarding

seems to say you need WiFi and DHCP

Neither is supported on a VAX system from the 1990s.

Any suggestions?

It runs on a static 10.0.0.n address I chose when I installed TCPIP on VMS

The port forwarding through the Xfinity app lets you choose a port but not the local address

I guess they assume the only devices you would want to port forward to the modem knows from its

WiFi DHCP list

Before Comcast, the DSL provider allowed its modem to take a port number and local IP address, so

I could use a Telnet application on my phone and the modem's WAN address and do this.

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Official Solution

Regular Visitor

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23 Messages

3 months ago

The DEC VAX VMS is actually not relevant. So the simple question is - how to port forward to a device on the modem's Ethernet port?

The Xfinity app only shows WiFi devices. It does not allow you to tell it the IP address of the system you want to forward to.

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