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I'm responsible for the IT side of the SUWS WebSDR and the GB3HV LAN that it lives on.

IT Equipment

Gateway Router

  • TP-Link WR-1043ND with OpenWRT Barrier Breaker
    • Wifi Disabled
    • Forwards port 80 to WebSDR
    • Proxies + protects http access to Ethernet Power-Switches and PstRotator

Networking Layout

LoRa Gateway + NTP Pi

  • Pi B+
  • 434MHz LoRa Receiver with HAB Supplies LoRa Gateway HAT (courtesy of Anthony Stirk) and RFM98
  • NTP PPS Server with HAB Supplies MAX7Q with Sarantel Helix Antenna
    • NTP version 4.2.8p2 (Installation)
    • NTP loop offset logging and graphing - http://[2a05:5241:100:4000:ba27:ebff:fe04:ccd4]/ Graphs (accessible over IPv6 only)


  • Core i7-2600 3.4GHz
  • 16GB DDR3


  • Set ntp to use local ntp server+uk pool
  • Disable IPv6 Privacy Extensions
    • /etc/sysctl.d/10-ipv6-privacy.conf

ufw Firewall Config

Status: active
Logging: off
Default: deny (incoming), allow (outgoing)
New profiles: skip
To                         Action      From
--                         ------      ----
22                         ALLOW IN    # ssh from vpn
80                         ALLOW IN    Anywhere
80                         ALLOW IN    Anywhere (v6)