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+# TCP/IP
+
+## IP address
+To change the machine's IP address you need to [rebuild ITS](NITS.md).
+
+### SIMH KA10 / KL10
+To get the `pdp10-ka` or `pdp10-kl` online with the lowest effort, use the included NAT interface via DHCP.
+This will assign ITS the ip `10.0.2.15`, set up routing automatically, and forward the ports you specify.
+Edit `build/pdp10-ka/run` and configure the `IMP` interface as follows:
+```
+# IMP Network Interface
+set imp mac=xx:xx:xx:xx:xx:xx
+set imp dhcp
+at imp nat:tcp=2123:10.0.2.15:23,tcp=2121:10.0.2.15:21,tcp=2195:10.0.2.15:95
+```
+This example adds port forwarding for telnet, ftp, and supdup. Modify according to your needs.
+
+### SIMH KS10
+The `simh` (KS) simulator does not currently support networking.
+
+### KLH10
+TBC...
+
+## DNS
+Check out this [external guide](https://its.victor.se/wiki/dqdev)
+
+## Mail
+Check out this [external guide](https://its.victor.se/wiki/mail-setup)
+
+## telnet, supdup
+They work out of the box
+
+
+# Chaosnet
+TBC...
+
+# Useful resources
+- [The ITS Wiki](https://its.victor.se/wiki/start)