Recently from outside through the IMAP mail systems、POP3 and SMTP port open more and more frequently in the case of e-mail account password try inside,Although e-mail systems have some mechanism can be blocked,But seeing so many reports IP really uncomfortable,Therefore, the process of collecting all these IP intend to import Sonicwall firewall,Direct to blacklist,After searching the Internet many articles,Sonicwall does not provide a way can be,So you want to build such a large number of IP Address Objects words,Through SSH would be the best way to save time。
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