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Nitro_146
Apprentice
Joined: 02 Mar 2005
Posts: 221
Location: Digne les bains, France
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 Posted: Fri Mar 01, 2013 7:30 pm Post subject: weird nmap results |
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Hi all,
I recently tested nmap on my box and I get some strange results :
| Code: | $ nmap localhost
Starting Nmap 6.01 ( http://nmap.org ) at 2013-03-01 19:22 CET
Nmap scan report for localhost (127.0.0.1)
Host is up (0.00013s latency).
Other addresses for localhost (not scanned): 127.0.0.1
Not shown: 995 closed ports
PORT STATE SERVICE
22/tcp open ssh
111/tcp open rpcbind
631/tcp open ipp
2049/tcp open nfs
3493/tcp open nut
8010/tcp open xmpp |
All of this seems ok for me. But if I use nmap with my public IP, I get :
| Code: | $nmap xxx.xxx.xxx.xxx
Starting Nmap 6.01 ( http://nmap.org ) at 2013-03-01 19:23 CET
Nmap scan report for xxx.xxx.xxx.xxx
Host is up (0.0039s latency).
Not shown: 993 closed ports
PORT STATE SERVICE
23/tcp filtered telnet
80/tcp open http
81/tcp open hosts2-ns
1503/tcp filtered imtc-mcs
1720/tcp filtered H.323/Q.931
1723/tcp filtered pptp
5190/tcp filtered aol |
My computer is the only machine on.
It is connected to a router (and printer server) : SMC Barricade
The router is connected to my provider's ADSL box (Alice ADSL)
The only port range mapped in the NAT (of both) is TCP 6881 to 6889 for bittorrent service.
I don't understand what are those open ports (I can understand 80)
Do you think there is a security issue ?
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Linux, cause booting is for adding new hardware |
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Hu
Administrator
Joined: 06 Mar 2007
Posts: 23088
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| Posted: Fri Mar 01, 2013 10:12 pm Post subject: |
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| If you ran that from outside, then I would be very concerned. If you ran it from inside, it seems a little off, and I would try running it from outside to see what happens. Your device should not be serving connections from the public like that. If it is answering internal machines when you talk to its WAN IP, that is not necessarily wrong. |
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Nitro_146
Apprentice
Joined: 02 Mar 2005
Posts: 221
Location: Digne les bains, France
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| Posted: Fri Mar 01, 2013 10:44 pm Post subject: |
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Thanks for your answer
I tested it from the inside.
I will try to test from the outside.
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Linux, cause booting is for adding new hardware |
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Networking & Security
