从IP地址到主机名，所有内容都是可以欺骗的。

Everything from IP addresses to hostnames, at the end of the day, can be spoofed.

youdao

因为反向域名搜索可以由地址块所有者确定，所以要防止ip欺骗的发生，必须进行第二次查找。

Because the reverse domain lookup can be anything the owner of the address block wants, the second lookup is necessary to ensure that no spoofing is taking place.

youdao

提醒客户不要理会要求保密账户或登录信息的邮件，并记住邮件中看来熟悉的链接可能转递到欺骗性的地址。

Customers are reminded to ignore emails asking for confidential account or log-in information and remember that familiar looking links in an email can redirect to a fraudulent site.

youdao