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Linux - Networking This forum is for any issue related to networks or networking.
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Old 10-08-2012, 01:00 AM   #1
fakie_flip
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Registered: Feb 2005
Location: San Antonio, Texas
Distribution: Gentoo Hardened using OpenRC not Systemd
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Weird nmap issues


I'm attempting to scan my default gateway. nmap says

Code:
> nmap -sV --allports 192.168.0.1

Starting Nmap 5.21 ( http://nmap.org ) at 2012-10-07 16:41 Central Daylight Time

Note: Host seems down. If it is really up, but blocking our ping probes, try -PN

Nmap done: 1 IP address (0 hosts up) scanned in 2.49 seconds
The host with that ip does reply to pings though.

Code:
> ping 192.168.0.1

Pinging 192.168.0.1 with 32 bytes of data:
Reply from 192.168.0.1: bytes=32 time=2ms TTL=64
Reply from 192.168.0.1: bytes=32 time=1ms TTL=64
Reply from 192.168.0.1: bytes=32 time=1ms TTL=64
Reply from 192.168.0.1: bytes=32 time=3ms TTL=64

Ping statistics for 192.168.0.1:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 1ms, Maximum = 3ms, Average = 1ms
Code:
> nmap -p 80 -PN 192.168.0.1

Starting Nmap 5.21 ( http://nmap.org ) at 2012-10-07 18:04 Central Daylight Tim

Nmap done: 1 IP address (0 hosts up) scanned in 1.33 seconds
I know for a fact port 80 is open. I am able to use a web-browser with it.
 
Old 10-08-2012, 01:48 AM   #2
acid_kewpie
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Registered: Jun 2001
Location: UK
Distribution: Gentoo, RHEL, Fedora, Centos
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Run a tcpdump during a ping and a scan and compare the traffic
 
  


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