nullroute | network | dn42

Parts of the AS 206633 network are reachable via dn42, using address ranges 172.20.158.0/27 as well as fd42:2606:32f4::/48.

What's available

The first ~10 or so addresses (172.20.158.0–9) are reserved for my servers which comprise the internal GRE mesh network (with address 0 being anycast); at the moment they don't offer anything beyond what's already accessible through the public Internet. The rest are assigned more or less randomly:

172.20.158.18 (DuneGW): A Mikrotik RB951G-2HnD router (accessible via Telnet with password “guest”). Can be used for /tool/ping, /tool/traceroute, or outbound connections via /system/ssh and /system/telnet.
172.20.158.15 (Dunelab-Cisco1760-top) 172.20.158.16 (Dunelab-Cisco1760-mid) 172.20.158.17 (Dunelab-Cisco1760-btm): A few old Cisco 1760 routers running IOS 12.3 (accessible via Telnet with password “cisco”). Can be used for ping & traceroute, outbound Telnet, or making X.25-over-TCP calls into the Telebahn network (use the pad command).
~~172.20.158.xx (Dune)~~: An old HP server running VMware ESXi, not yet publicly available but one day might host a dn42 “shell account” VM or two.
172.20.158.10 (HomeGW): Address used to SNAT connections into dn42 from my home LAN (which is 10.147.2.0/24).

X.25 over TCP

One of the Cisco1760s is (will eventually be?) also accessible via TELEBAHN X.25 at 471041. The routing configuration for IOS would be:

x25 route ^471 xot dns x25.nullroute.lt