What are some advanced solutions for persistent Weasel errors in Destiny 2 on PS4?

For persistent Weasel errors on PS4, consider advanced solutions such as changing your DNS settings to a public DNS server (like Google DNS or Cloudflare DNS), forwarding ports on your router (Bungie provides a list of required ports), and checking if your router's firmware is up-to-date. Temporarily disabling your firewall can also help identify if it's the culprit.