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Questions tagged [nmap]

Nmap (Network Mapper) is a security scanner originally written by Gordon Lyon (also known by his pseudonym Fyodor Vaskovich) used to discover hosts and services on a computer network, thus creating a "map" of the network.

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Why is port 444 open on this router?

I have a Cisco RV110W. I ran nmap at it from the outside and nmap reports that the router has tcp port 444 open. Yet there are no port forwarding rules specifying this port. It should as far as I can tell, be closed. There's even a service listening…
TJ Thind
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Check open port: 6129 filtered

I've started a security audit on my server and with a simple nmap scan I discover the situation below: Starting Nmap 5.21 ( http://nmap.org ) at 2012-10-31 17:14 CET Nmap scan report for ********* (*********) Host is up (0.021s latency). Not shown:…
user1684189
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Ubuntu 12.04 slow reply to nmap

We've upgraded some of our servers to 12.04 recently, and i've noticed that when I run nmap from some other server to check open ports on these 12.04 servers it take WAY longer than before. is this a known issue?
SecondThought
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What's the difference between http-proxy and ccproxy-http?

Good day, After execution command nmap -p 8080 myserver.address I've got this message PORT STATE SERVICE 8080/tcp filtered http-proxy And aftar nmap -p 808 myserver.address I've got PORT STATE SERVICE 808/tcp filtered…
Andriy
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While using Nmap and sweep the network with a ping

I'm studying up on using Nmap, and there is a command that sweeps the network with a simple Ping scan to determine which hosts are online. The command is this: 1 [ignore_this]# nmap -sP 10.0.0.0/24 And the output: 3 Starting Nmap 4.01 (…
Gabriel
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IP ID Sequence Generation

Perchance someone could explain me or give point me in the right direction to achieve understanding of "Busy server or unknown class" in the nmap output? "IP ID Sequence Generation: Busy server or unknown class"
Anand
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Why is nmap now taking a long time to perform subnet ping?

I've been using the nmap tool on my Windows machine to ping my Uni house home network range using the following command: nmap 192.168.1.0/24 -sn I had no problems with this and it was only taking 5-10 seconds to complete. Since I've returned home…
Bernard
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Windows Server 2008 Standard, firewall disabled by Group Policy but ports are still filtered

Hihi, So vanilla install of WS2008R2S, disabled FW with GP and trying grab SNMP with another host on the same subnet. The output of both if/ipconfig's and nmap -p 161 is below. Both machines running in VirtualBox with the connections bridged to the…
Jake
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Managing the Network from a linux machine

I am using Linux at my work, and i am kind of a sys admin / IT support, (not exactly my title but i do this kind of things since there is no one else). There are mostly Windows user in my organization and some linux users, we have linux servers…
aviv
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nmap external localhost with iptables

I have a status monitor that I wish to set up using nmap to show all my externally open ports. Naturally nmap came to mind. Unfortunately I use an iptables firewall and allow all traffic on the loopback interface. I want this and need this, as I…
user87600
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Why is my IMAP port not showing as open ( yet it works? )

Ive recently setup Postfix and Dovecot IMAP on a Debian Lenny box. Sending to this domain works fine and reading the email via IMAP works fine too. I'm curious though as to why when running nmap, port 10143 is not shown as open. nmap -sS -O…
Leo
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Block nmap xmas scan from detecting my server's open port

I have blocked all the basic nmap scans using iptables by making a rule in the INPUT chain that if the no of packet send from a particular ip within 10 seconds exceeds a particular limit then put that ip in blacklist and deny the further packets.…
pradeepchhetri
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Network audit tracker

I'm looking for a tool like PBNJ (http://pbnj.sourceforge.net/) but not quite. The functionality I'm looking for is something I can throw into cron to run daily or weekly, scan a network(s), store the findings and produce a diff-like report of hosts…
delimiter69
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iptables & nmap on ubuntu

The following are my iptable rules on a ubuntu cloud server: cat /etc/iptables.rules: *filter :INPUT DROP [598:41912] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [456:35354] -A INPUT -i lo -j ACCEPT -A INPUT -p tcp -m tcp --dport 80 -j ACCEPT …
user53864
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How to scan for which ports would be open to another location

I'm just assessing the security of my home server in preparation for opening it up to the internet. I've used nmap from a machine on my local network but I have firewall rules allowing access from the local network so this reveals more than I think…
Ben Hymers
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