[CentOS] nmap showing lots of ports open that shouldn't be

Simone simone72 at email.it
Tue Feb 14 12:36:59 UTC 2006


This might be silly, but could you remote ssh into that machine and run 
nmap pointing to its IP address so you could find out with no doubt 
which ports are opened?

Have a nice day

Will McDonald wrote:

>On 12/02/06, Jim Bassett <jim at datamantic.com> wrote:
>  
>
>>What is the canonical way to get a list of all open ports from the
>>command line? Or maybe it's not so straightforward?
>>    
>>
>
>$ netstat -ln
>
>Though netstat -a | grep LISTEN should give the same result I'd have thought.
>
>  
>
>>Someone else suggested running netstat -a | grep LISTEN, and that
>>indeed shows only services I would expect.
>>
>>I understand that iptables is very powerful, and therefore not the
>>easiest tool to use. But I would guess that the setup I want is
>>pretty standard. I've found a bunch of info in google and I am
>>digging in, but are there some iptables cookbook type recipes for a
>>basic web/mail/dns server anyone could point me to?
>>    
>>
>
>The O'Reilly Linux Server Security book covers firewalling in quite an
>easy to understand fashion and there's a decent bastion host firewall
>script which is well commented...
>
>http://examples.oreilly.com/linuxss2/
>
>Will.
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>  
>




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