external-monitor.sown.org.uk is a server hosted fully outside the SOWN and University of Southampton network. This allows its to effectively check particular hosts and services are externally visible. At present this server is a VM hosted in a data centre in Ireland.
It has a 2GHz QEMU Virtual CPU processor with 512MiB0.5 GiB
of memory. It has a 10GiB10,240 MiB
hard drive and it has 1x 100Mbit/s Virtio Ethernet port. Dublin, Ireland (52° 50' 34", -6° 56' 20")
The server's operating system is Ubuntu Linux 16.04 LTS running on Linux Kernel 4.4.0-xx-generic (x86_64).
The server also has the following software installed on it:
- External monitoring proxy
This server is connected with the following IP addresses:
- 2001:470:1f08:391::2 using a Hurricane Electric tunnel
Its MAC address is 00:16:3e:0f:55:15 on its eth0 interface it also has a he-ipv6 interface for the Hurricane Electric tunnel to provide IPv6 connectivity.
Bespoke Service Checks
- Checks that the Hurricane Electic tunnel. This check will report CRITICAL if the tunnel interface is down. It reports WARNING if there is an issue pinging 2001:4860:4860::8888 (Google's DNS server) or sees packet loss greater than 20% or latency greater than 100ms.