Should I block TCP/UDP ports 135 to 139 on my router?

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Level 1

4 points

Should I block TCP/UDP ports 135 to 139 on my router?

For the sake of Internet and Desktop security should I block TCP/UDP ports 135 to 139 both ways at all times on my router? This seems to be recommended for Windows environments. Does Mavericks need these ports for its proper operation? When tested, ports 135, 137,18 show as closed whereas all other ports are Stealth. Ideally, they should all be Stealth.

iMac (27-inch Mid 2011), Mac OS X (10.7.4)

Posted on Jan 25, 2014 9:04 PM

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Answer 1

jayv.

Level 4

1,303 points

Jan 25, 2014 10:01 PM in response to Dramateyes

Have a read here: http://securityspread.com/2013/07/26/firewall/

Stealth is just as good as closed, some would argue that stealth is just as much of a giveaway of the port being present as it being closed.

The specific ports you mention pose no risk to OS X as far as I am aware.

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