NMAP Always says host is down (when using -Pn it says ports filtered)
I am running Kali 2.0 (Kali sana) and I have a problem with NMAP, it everytime says that host is down when I scan it (even myself with firewall off)... When I try online nmap (https://pentest-tools.com/network-vulnerability-scanning/tcp-port-scanner-online-nmap) on my IP it works... I do not know what can be wrong.
networking security port nmap
edited Jan 21 '18 at 19:25
Raghav Dinesh
1115
asked Jan 8 '16 at 21:34
EntropyEntropy
615
add a comment |
I am running Kali 2.0 (Kali sana) and I have a problem with NMAP, it everytime says that host is down when I scan it (even myself with firewall off)... When I try online nmap (https://pentest-tools.com/network-vulnerability-scanning/tcp-port-scanner-online-nmap) on my IP it works... I do not know what can be wrong.
networking security port nmap
edited Jan 21 '18 at 19:25
Raghav Dinesh
1115
asked Jan 8 '16 at 21:34
EntropyEntropy
615
add a comment |
I am running Kali 2.0 (Kali sana) and I have a problem with NMAP, it everytime says that host is down when I scan it (even myself with firewall off)... When I try online nmap (https://pentest-tools.com/network-vulnerability-scanning/tcp-port-scanner-online-nmap) on my IP it works... I do not know what can be wrong.
networking security port nmap
edited Jan 21 '18 at 19:25
Raghav Dinesh
1115
asked Jan 8 '16 at 21:34
EntropyEntropy
615
I am running Kali 2.0 (Kali sana) and I have a problem with NMAP, it everytime says that host is down when I scan it (even myself with firewall off)... When I try online nmap (https://pentest-tools.com/network-vulnerability-scanning/tcp-port-scanner-online-nmap) on my IP it works... I do not know what can be wrong.
networking security port nmap
networking security port nmap
edited Jan 21 '18 at 19:25
Raghav Dinesh
1115
asked Jan 8 '16 at 21:34
EntropyEntropy
615
edited Jan 21 '18 at 19:25
Raghav Dinesh
1115
asked Jan 8 '16 at 21:34
EntropyEntropy
615
edited Jan 21 '18 at 19:25
Raghav Dinesh
1115
edited Jan 21 '18 at 19:25
Raghav Dinesh
1115
edited Jan 21 '18 at 19:25
Raghav Dinesh
1115
1115
asked Jan 8 '16 at 21:34
EntropyEntropy
615
asked Jan 8 '16 at 21:34
EntropyEntropy
615
asked Jan 8 '16 at 21:34
EntropyEntropy
615
615
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
You are probably seeing this message:
Note: Host seems down. If it is really up, but blocking our ping probes, try -PN
Usually, nmap sends a number of probes to determine if the host is actually up or down, one of them is pinging the host. ping uses ICMP packets to reach the host, so if you're seeing that message it's either because the destination host has incoming ICMP packets filtered, either because you have outgoing ICMP packets filtered in your firewall.
As per the situation that you describe (nmap run from an external source works fine but you locally are unable to nmap any host), the most likely reason is that you have outgoing ICMP packets filtered. Note that router is not the only device capable of blocking traffic. Antivirus, software firewalls also are.
answered Jan 9 '16 at 17:55
nKnnKn
4,48552231
I see that but when i try online nmap tool it works.... It does that thing "host seems down" for every host i try...
– Entropy
Jan 9 '16 at 20:09
Then you probably have outgoing ICMP requests filtered.
– nKn
Jan 9 '16 at 20:26
My router is not filtering ICMP packets nor there is other way it can be filtered as it works on my WIndows machine (main machine - Kali is Dual Boot)... And I do not have Antivirus or firewall on Kali.
– Entropy
Jan 10 '16 at 13:27
It suddenly stopped to work even on Windows...
– Entropy
Jan 10 '16 at 18:50
add a comment |
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1 Answer
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You are probably seeing this message:
Note: Host seems down. If it is really up, but blocking our ping probes, try -PN
Usually, nmap sends a number of probes to determine if the host is actually up or down, one of them is pinging the host. ping uses ICMP packets to reach the host, so if you're seeing that message it's either because the destination host has incoming ICMP packets filtered, either because you have outgoing ICMP packets filtered in your firewall.
As per the situation that you describe (nmap run from an external source works fine but you locally are unable to nmap any host), the most likely reason is that you have outgoing ICMP packets filtered. Note that router is not the only device capable of blocking traffic. Antivirus, software firewalls also are.
answered Jan 9 '16 at 17:55
nKnnKn
4,48552231
I see that but when i try online nmap tool it works.... It does that thing "host seems down" for every host i try...
– Entropy
Jan 9 '16 at 20:09
Then you probably have outgoing ICMP requests filtered.
– nKn
Jan 9 '16 at 20:26
My router is not filtering ICMP packets nor there is other way it can be filtered as it works on my WIndows machine (main machine - Kali is Dual Boot)... And I do not have Antivirus or firewall on Kali.
– Entropy
Jan 10 '16 at 13:27
It suddenly stopped to work even on Windows...
– Entropy
Jan 10 '16 at 18:50
add a comment |
You are probably seeing this message:
Note: Host seems down. If it is really up, but blocking our ping probes, try -PN
Usually, nmap sends a number of probes to determine if the host is actually up or down, one of them is pinging the host. ping uses ICMP packets to reach the host, so if you're seeing that message it's either because the destination host has incoming ICMP packets filtered, either because you have outgoing ICMP packets filtered in your firewall.
As per the situation that you describe (nmap run from an external source works fine but you locally are unable to nmap any host), the most likely reason is that you have outgoing ICMP packets filtered. Note that router is not the only device capable of blocking traffic. Antivirus, software firewalls also are.
answered Jan 9 '16 at 17:55
nKnnKn
4,48552231
I see that but when i try online nmap tool it works.... It does that thing "host seems down" for every host i try...
– Entropy
Jan 9 '16 at 20:09
Then you probably have outgoing ICMP requests filtered.
– nKn
Jan 9 '16 at 20:26
My router is not filtering ICMP packets nor there is other way it can be filtered as it works on my WIndows machine (main machine - Kali is Dual Boot)... And I do not have Antivirus or firewall on Kali.
– Entropy
Jan 10 '16 at 13:27
It suddenly stopped to work even on Windows...
– Entropy
Jan 10 '16 at 18:50
add a comment |
You are probably seeing this message:
Note: Host seems down. If it is really up, but blocking our ping probes, try -PN
Usually, nmap sends a number of probes to determine if the host is actually up or down, one of them is pinging the host. ping uses ICMP packets to reach the host, so if you're seeing that message it's either because the destination host has incoming ICMP packets filtered, either because you have outgoing ICMP packets filtered in your firewall.
As per the situation that you describe (nmap run from an external source works fine but you locally are unable to nmap any host), the most likely reason is that you have outgoing ICMP packets filtered. Note that router is not the only device capable of blocking traffic. Antivirus, software firewalls also are.
answered Jan 9 '16 at 17:55
nKnnKn
4,48552231
You are probably seeing this message:
Note: Host seems down. If it is really up, but blocking our ping probes, try -PN
Usually, nmap sends a number of probes to determine if the host is actually up or down, one of them is pinging the host. ping uses ICMP packets to reach the host, so if you're seeing that message it's either because the destination host has incoming ICMP packets filtered, either because you have outgoing ICMP packets filtered in your firewall.
As per the situation that you describe (nmap run from an external source works fine but you locally are unable to nmap any host), the most likely reason is that you have outgoing ICMP packets filtered. Note that router is not the only device capable of blocking traffic. Antivirus, software firewalls also are.
answered Jan 9 '16 at 17:55
nKnnKn
4,48552231
edited Jan 10 '16 at 8:45
answered Jan 9 '16 at 17:55
nKnnKn
4,48552231
answered Jan 9 '16 at 17:55
nKnnKn
4,48552231
answered Jan 9 '16 at 17:55
nKnnKn
4,48552231
4,48552231
I see that but when i try online nmap tool it works.... It does that thing "host seems down" for every host i try...
– Entropy
Jan 9 '16 at 20:09
Then you probably have outgoing ICMP requests filtered.
– nKn
Jan 9 '16 at 20:26
My router is not filtering ICMP packets nor there is other way it can be filtered as it works on my WIndows machine (main machine - Kali is Dual Boot)... And I do not have Antivirus or firewall on Kali.
– Entropy
Jan 10 '16 at 13:27
It suddenly stopped to work even on Windows...
– Entropy
Jan 10 '16 at 18:50
add a comment |
I see that but when i try online nmap tool it works.... It does that thing "host seems down" for every host i try...
– Entropy
Jan 9 '16 at 20:09
Then you probably have outgoing ICMP requests filtered.
– nKn
Jan 9 '16 at 20:26
My router is not filtering ICMP packets nor there is other way it can be filtered as it works on my WIndows machine (main machine - Kali is Dual Boot)... And I do not have Antivirus or firewall on Kali.
– Entropy
Jan 10 '16 at 13:27
It suddenly stopped to work even on Windows...
– Entropy
Jan 10 '16 at 18:50
I see that but when i try online nmap tool it works.... It does that thing "host seems down" for every host i try...
– Entropy
Jan 9 '16 at 20:09
I see that but when i try online nmap tool it works.... It does that thing "host seems down" for every host i try...
– Entropy
Jan 9 '16 at 20:09
Then you probably have outgoing ICMP requests filtered.
– nKn
Jan 9 '16 at 20:26
Then you probably have outgoing ICMP requests filtered.
– nKn
Jan 9 '16 at 20:26
My router is not filtering ICMP packets nor there is other way it can be filtered as it works on my WIndows machine (main machine - Kali is Dual Boot)... And I do not have Antivirus or firewall on Kali.
– Entropy
Jan 10 '16 at 13:27
My router is not filtering ICMP packets nor there is other way it can be filtered as it works on my WIndows machine (main machine - Kali is Dual Boot)... And I do not have Antivirus or firewall on Kali.
– Entropy
Jan 10 '16 at 13:27
It suddenly stopped to work even on Windows...
– Entropy
Jan 10 '16 at 18:50
It suddenly stopped to work even on Windows...
– Entropy
Jan 10 '16 at 18:50
add a comment |
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