Outbound requests destined for Snyk are routed over a content delivery network (CDN) which rotates IP addresses and entire IP ranges on an ongoing basis.
Thus, it is advised to whitelist traffic to *.snyk.io on 443 (HTTPS). Some but not all of our FQDN's include:
For whitelisting inbound requests originating from Snyk, read our Snyk Broker information.
For customers on our regional hosting multitenancies (European or Australian multitennants), please see our regional hosting page for relevant URLs - https://docs.snyk.io/working-with-snyk/regional-hosting-and-data-residency. However whitelisting *.snyk.io will cover these options too.