Hello Anthony,
Please, make your /etc/apt/sources.list to look like this:
# deb cdrom:[Debian GNU/Linux 8.9.0 Jessie - Official i386 NETINST Binary-1 20170723-10:27]/ jessie main
# deb cdrom:[Debian GNU/Linux 8.9.0 Jessie - Official i386 NETINST Binary-1 20170723-10:27]/ jessie main
deb http://ukdebian.mirror.anlx.net/debian/ jessie main non-free contrib
# deb-src http://ukdebian.mirror.anlx.net/debian/ jessie main
deb http://security.debian.org/ jessie/updates main non-free contrib
# deb-src http://security.debian.org/ jessie/updates main
# jessie-updates, previously known as ‘volatile’
deb http://ukdebian.mirror.anlx.net/debian/ jessie-updates main non-free contrib
# deb-src http://ukdebian.mirror.anlx.net/debian/ jessie-updates main
# public packages from aspl
deb http://www.core-admin.com/debian jessie/
After that, update your sources as usual (it must end without any error):
# apt-get update
We have tested in a virtual machine and should allow you to find all Core-Admin packages:
# apt-cache show turbulence-server
Package: turbulence-server
Priority: extra
Section: libs
Installed-Size: 106
Maintainer: Francis Brosnan francis@aspl.es
Architecture: amd64
Source: turbulence
Version: 0.6.3-2855
Depends: libturbulence (>= 0.6.3-2855)
Filename: jessie/turbulence-server_0.6.3-2855_amd64.deb
Size: 13350
MD5sum: 4c5623ab94f492362a15ac1f01cf157d
SHA1: a41a3da7d388322373bb07b17fed7f8ac9430b73
SHA256: db1032b0f07035715e2c95cfa51f3e51b3aee97273d3074e5be8814074832884
SHA512: 2a88866f74bdb540afe969deef79278e0a5c6dceff8de3e032f5068a9513e049658be7192e0100bd4327fe8858b4c4c4ea77c98fded98a1b165dd96d5d8a9b1f
Description: BEEP application server built on top of Vortex Library
Turbulence is an extensible and configurable general purpose
BEEP application server built on top of Vortex Library.
It provides out of the box support for profile administration,
SASL users, system logging and more.
Description-md5: 19d8555d8b8791b29811dac8e08edf00
After that, attempt to install again your core-admin server as usual (by using Install core-admin server menu option):
# rm -f core-admin-installer.py
# wget https://core-admin.com/downloads/core-admin-installer.py
# chmod +x core-admin-installer.py
# ./core-admin-installer.py
Let see if works now