In some cases, your clients might have a heavily restricted firewall, and this would require that they whitelist the IPs used by Cryptolens to perform license key activations. We recommend to whitelist the following IPs on port 443, which are used by Cryptolens:
IPNotes
20.82.170.150api.cryptolens.io, used at the moment in newer versions of the client SDKs
23.102.21.212app.cryptolens.io, may be used in older client SDKs.