Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.
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|Using Grep to Find a file||8||99|
|ACL in Solaris 10 & AIX V6.1 to circumvent application required grp:rwx||9||116|
|Linux : can't create transaction lock on rpm.lock (Permission denied)||10||320|
|restricting types of files/data that could be uploaded to Windows & UNIX servers||5||67|