Is performing a reverse IP check illegal?
执行反向 IP 检查是否违法？
No, running a dns reverse lookup is not illegal. There is no problem in taking an IP address and finding the domain name behind it. However, you shouldn’t take unethical measures to find the IP itself.
不，运行 DNS 反向查找并不违法。获取 IP 地址并查找其背后的域名没有问题。但是，您不应该采取不道德的措施来查找 IP 本身。