open ports

[Valeri Galtsev]

On Sat, November 26, 2016 1:59 pm, Ernie Luzar wrote:
> Bernt Hansson wrote:
>
>> On 2016-11-26 19:19, Ernie Luzar wrote:
>>> Running 11.0 release, ipfilter firewall with rules to block inbound
>>> port 21, 25, 110. Nmap shows those ports are open even though the
>>> firewall is blocking them. Is this expected?
>>>
>> You are testing them from the "outside"
>>
>
> Issued this command from the command line of the host.
> IE; not from some host on the public net.
>
> nmap -v xxx.xxx.xxx.xxx    x = host public IP address
>

As Bernt Hansson has mentioned, this command should have been executed on
different host. You are testing rile for _inbound_ traffic, that is why
different host, not the machine itself.

I hope this helps.

Valeri

>
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++++++++++++++++++++++++++++++++++++++++
Valeri Galtsev
Sr System Administrator
Department of Astronomy and Astrophysics
Kavli Institute for Cosmological Physics
University of Chicago
Phone: 773-702-4247
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