Network egress control — compute isolation means nothing if the sandbox can freely phone home. Options range from disabling networking entirely, to running an allowlist proxy (like Squid) that blocks DNS resolution inside the sandbox and forces all traffic through a domain-level allowlist, to dropping CAP_NET_RAW so the sandbox cannot bypass DNS with raw sockets.
要知道，这可是曾经的 “东北药茅”，巅峰时市值超 2000 亿，还缔造过 “5 万变 500 万” 的十年百倍神话。
，更多细节参见51吃瓜
; Far CALL (protected mode)
self.seen_urls = set()