port security help

Regarding TCP.IP ports. what ports should i disable and what ports should i keep open on a cisco router within my network.

Reply to
93RX7TT
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Hi,

Nobody can tell you the answer to that question. What would you want to go in/out of your network?

i would start with

www pop3 dns smtp any bespoke apps you have

not sure if you need

ntp snmp any routing protcols

I would block everything else and then begin permitting in/out as and when people complain they can't access various services.

Paul

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howtonetwork

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