Re: How to detect whether firewall service is provided by server or by ISP?

[Nikhil Wagholikar <visitnikhil () gmail com>]

Hi Martin,

I dint get what you meant by 'Firewall service provided by router'? I
think you meant to say ACLs/ACEs on Router.

What quickly comes to my mind is, do a 'whois' of the IP Address of
the Firewall and see as to whom it is registered. The possibilities
are that the IP Address will fall in the IP Address range/pool
registered to:

1. The ISP or
2. The server

Hope this helps!

---
Nikhil Wagholikar
CEH, CHFI, ISO 27001, CISA, CPISI, CNSM

On 16 September 2010 16:53, martin <m4rtin86 () gmail com> wrote:
> I have two servers behind different networks. First network is
> protected with firewall provided by the router and there is no
> firewall in the server:
>
> [root@martin ~]# nmap --reason -n -PN -p445 192.168.217.73
>
> Starting Nmap 5.00 ( http://nmap.org ) at 2010-09-16 13:57 EEST
> Interesting ports on 192.168.217.73:
> PORT    STATE    SERVICE      REASON
> 445/tcp filtered microsoft-ds no-response
>
> Nmap done: 1 IP address (1 host up) scanned in 2.15 seconds
> [root@martint ~]#
>
> The other server is in the second network and there is no firewall
> service provided by the router, but firewall is activated in the
> server:
>
> [root@martin ~]# nmap --reason -n -PN -p9731 192.168.13.19
>
> Starting Nmap 5.00 ( http://nmap.org ) at 2010-09-16 13:56 EEST
> Interesting ports on 192.168.13.19:
> PORT     STATE    SERVICE REASON
> 9731/tcp filtered unknown no-response
>
> Nmap done: 1 IP address (1 host up) scanned in 2.15 seconds
> [root@martin ~]#
>
> Is there somehow possibility to detect, whether firewall is active in
> the server or in the router?
>
> ------------------------------------------------------------------------
> Securing Apache Web Server with thawte Digital Certificate
> In this guide we examine the importance of Apache-SSL and who needs an SSL certificate.  We look at how SSL works, 
> how it benefits your company and how your customers can tell if a site is secure. You will find out how to test, 
> purchase, install and use a thawte Digital Certificate on your Apache web server. Throughout, best practices for 
> set-up are highlighted to help you ensure efficient ongoing management of your encryption keys and digital 
> certificates.
>
> http://www.dinclinx.com/Redirect.aspx?36;4175;25;1371;0;5;946;e13b6be442f727d1
> ------------------------------------------------------------------------

------------------------------------------------------------------------
Securing Apache Web Server with thawte Digital Certificate
In this guide we examine the importance of Apache-SSL and who needs an SSL certificate.  We look at how SSL works, how 
it benefits your company and how your customers can tell if a site is secure. You will find out how to test, purchase, 
install and use a thawte Digital Certificate on your Apache web server. Throughout, best practices for set-up are 
highlighted to help you ensure efficient ongoing management of your encryption keys and digital certificates.

http://www.dinclinx.com/Redirect.aspx?36;4175;25;1371;0;5;946;e13b6be442f727d1
------------------------------------------------------------------------