Lansweeper Auto Update is not working when using a proxy server. It only shows "Checking for updates" and/or "No updates available" - even if there is one available.
It seems that it is ignoring the system proxy. Other Lansweeper services that connect to the internet (cloud sync) do work with the proxy.
Wireshark shows outgoing connections directly to Lansweeper IP addresses, ignoring proxy settings:
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Retrieving the certs from one of these IPs shows it is indeed a Lansweeper server:
user@machine:~$ openssl s_client -showcerts -connect 52.214.87.66:443 -proxy (proxy ip):3128 </dev/null | grep lansweeper
depth=0 CN = *.lansweeper.com
verify return:1
0 s:CN = *.lansweeper.com
subject=CN = *.lansweeper.com
DONE
user@machine:~$