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Portscanning doesn't detect open ports

andy.l
Hi
I've configured an Astaro Gateway, and use an external port scanner to check my solution. I've opened up port 25 (smtp) for my internal mail relay. But when I run an external port scanner (Shields up at Home of Gibson Research Corporation) It does not detect any open ports, but when I explicitly specify port 25 it finds the open ports. Is this as result of Astaro's built in security?

/Andy


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  • 0
    GRC's port scanning will not work properly if you are running it through the proxy. IE: the PC you are using to initiate the scan sits behind the (a) proxy.  I would go to another location and scan your external IP with Nmap.

    Coder68
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  • 0
    GRC's port scanning will not work properly if you are running it through the proxy. IE: the PC you are using to initiate the scan sits behind the (a) proxy.  I would go to another location and scan your external IP with Nmap.

    Coder68
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