Programs that map out a network to figure out which computers and services are available to be exploited.

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66 views

How do I scan for and discover active IPv6 addresses of devices behind a router?

Usually with IPv4 and NAT you can only access a device behind a router if the router is port-forwarded correctly or is the router's DMZ. When behind the router you can easily scan for the IPs behind ...
3
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1answer
165 views

A PC constantly scans my network for IP addresses using ARP

Using wireshark I have found that one PC on my network constantly scans for devices on the network using ARP, e.g. Who has 192.168.0.26? Tell 192.168.0.10 It does that approx. 2 times a second and ...
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0answers
23 views

Scapy problem in sending packet

I am trying to use Scapy for testing the network. Whenever I send a packet with commands like send, sr ,sr1 I get this message: python.exe has stopped working I am using Scapy 2.2.0 on Windows ...
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0answers
24 views

Cannot find/create zombie/idle VM

I'm trying to do a "stealthy" net scan using metasploit. The first step is to spoof the ip of a "zombie/iddle" machine in order to not give your own Ip. I try to find a zombie machine on a virtualized ...
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0answers
11 views

Why is the maximum port range 65535 in the TCP/IP Suite ? [migrated]

My doubt is that - a port is just logical, so why such restriction ? Why can't I have a port of 9924593 or something like that ?
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2answers
187 views

Nmap through proxy

Using the following command: nmap --proxy socks4://*.*.*.*:25074 -sV -O --reason scanme.nmap.org I'm not sure if nmap is really using the proxy specified Had an idea of scanning "localhost" or ...
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2answers
95 views

Is an ARP scan stealthy?

If you want to discover the live hosts on your subnetwork how can you exploit the ARP protocol in order to scan stealthily? Would an arp scan be picked up as suspicious activity? Could you spoof ...
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3answers
150 views

Why is UDP port scanning slower than TCP port scanning?

I can't seem to find an answer for this. Any suggestions?
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1answer
58 views

What could an attacker do with informations about devices in my local network?

If a malicious website would scan my local network (via WebRTC) for devices, what could the attacker do it with it? Does it need to be in the same WIFI-Network in order to login to a service? (for ...
3
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1answer
124 views

Scanning private IPs from outside network

Is it possible with Nmap (or other tool) to scan a range of private IPs (let's say 10.0.0.0/8) but being outside any private network (using those IPs) ?
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1answer
111 views

Triangulate a mac adress

Last Sunday my iMac was stolen by a burglar. On Monday it showed up on 'find my mac'. Good police work and a lot of luck ended up in me retrieving my device that was on a location more than 50 meter ...
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2answers
41 views

How does Nessus know which services are running in a host?

I'd like to know how does a vulnerability scanner such as Nessus know which services are running, once it has scanned the ports. I don't want to know the steps to do this in Nessus, I want to know ...
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2answers
89 views

How to evaluate a wireless network risk level?

When travelling everyone has to use structural wireless networks (managed by airports, hotels, museums, restaurants…). Some of these only open (80|443)/tcp/ip once you have provided an E-mail or ...
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1answer
50 views

How to perform an idle scan against a target using Nmap with a list of zombies? [closed]

I want to perform port scan against a target but the firewall at the target only allows traffic to the ports through certain IP address/machines. I tried to perform an idle scan in Nmap but it only ...
3
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1answer
71 views

Persistent back door using Netcat

I have found the following command several times in one of the linux servers during an assessment: nc -l -p 3030 -e /bin/bash This enables a hacker to gain control over this sever via bash. By ...
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2answers
153 views

How to scan for ports opened by TCP/UDP sockets with nmap or any other tool?

I'm new to nmap and I've been digging with it lately to scan some devices on the current LAN for ports opened by socket programs which are running. First I ran a simple UDP server on my machine on ...
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4answers
4k views

How do you deal with massive port scans?

This morning I was looking through firewall logs and saw there were about 500 packets marked as port scan. The scanning range was from 1000-1200 5000-5200. The IP address is 85.25.217.47 which seems ...
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3answers
202 views

Nmap showing ISPs router's DNS port in addition to target's ports

Whenever I do nmap scans my ISP router DNS port like the following. This happens for every IP or target. $ nmap -T4 -A -v stackoverflow.com PORT STATE SERVICE VERSION 53/tcp open domain ...
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1answer
38 views

Network traffic analyzer for Video [closed]

I am going to be streaming video on an open network. I need the simplest network traffic analyzer that would enable me to know when the video is stopped and started from another system on the same ...
1
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1answer
274 views

Nessus web client: Error 401 invalid credentials [closed]

Previously I used to scan sites using Nessus web client, but when I tried to login with the same credentials I am able to see a401 (Invalid Credentials) error. I have restarted the service nessusd, ...
2
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1answer
56 views

Finding Targets in Foreign Network

Say you popped into a network after exploiting something, and you are looking to further infiltrate the network. When theorizing in my head I realized the local ip's can change themselves. So doing ...
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1answer
49 views

Resuming an interrupted nmap scan:

I need to: --resume <filename>: Resume an aborted interrupted scan. But I didn’t: -oN/-oX/-oS/-oG <file>: Output scan in normal, XML, s|<rIpt kIddi3, ...
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1answer
31 views

network port registry

I am planning to build an app which gives information about the network port and the service name for non-opensource based products. Is there a legal implication of building such apps? because someone ...
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2answers
143 views

Stop Nmap scan and preserve XML output

Every time I run Nmap I use the -oA flag. The XML output is an important output item as I feed it into a number of parsers plus Metasploit with db_import. The --resume option can resume a scan but it ...
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2answers
91 views

Is a Windows (fresh installation) 7 really this safe against NMAP or am I missing something?

I am playing with NMAP in my small private network performing port scanning. So far I went through scanning the following OSs (Unaltered new installations - Meaning no extra software installed!): ...
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1answer
331 views

Netdiscover running on NAT interface not finding IP addresses on host-only network?

I am practicing penetration testing techniques using Kali Linux (most recent distro) and various vulnerable virtual machines (DVWA, Metasplotiable). My attack and targets are all running via ...
2
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1answer
89 views

Hiding packets, requests, traffic from my PC through Ethernet connected to workplace network

Before everyone jumps on the bandwagon, as I so often see, of saying you shouldn't do anything on a workplace network that is to be done annonymously on your own home network, I want to know an actual ...
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1answer
63 views

What local ethernet-accessible resources can be accessed on a PC through a USB cable?

Clarification: this is about scanning the network resources on computer B from computer A in a situation where: Computer A is connected to Computer B through a USB cable Computer A has some scanning ...
2
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0answers
129 views

nmap OS scan showing DD-WRT when I'm not running it?

This weekend, I set up pfSense on a spare box that I had sitting in the garage. It seems cool and powerful, but I haven't messed with it much yet. Was doing some basic nmap scanning from work against ...
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0answers
50 views

Does hping support FTP Bounce scanning?

Does hping support FTP Bounce scanning? I googled it, but I couldn't find its command, so I think it didn't support it. I just find command for nmap not hping.
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2answers
883 views

Discovering IP or Mac address of mobile devices passing by.

Is it possible for someone to discover the IP and/or MAC address of my mobile device, even if I do not attempt to connect to their network?
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1answer
73 views

Denial of Service during scanning [closed]

As I know you can do Denial of Service when footprinting with scanners, like nmap or Maltego. But is it legal? As I know, scanning isn't illegal but doing DoS attacks is. EDIT I meant if you scan ...
2
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2answers
95 views

Legally port scanning (Whitelist)

I am attempting to set up a security vulnerability scanning server. I have several customers interested in using it to scan their systems. I will be port scanning and carrying out intrusion detection, ...
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2answers
39 views

Profile applications from traffic analysis

I'm investigating options for segmenting a less secure business unit behind a Cisco 5505. I want to take this action quietly and transparently for political reasons. I want to know if it is possible ...
6
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1answer
265 views

Port Scanning - States definition

I am currently reading the "NMAP Network Scanning" book by Gordon Fyodor Lyon. On page 77 there is a description on how NMAP categorizes the ports based on host's responses (or not). What would help ...
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1answer
46 views

hping3 - Ignoring not responding ports

Is there a way to ignore the not responding ports in the scan report? james@ahoi:~$ sudo hping3 -q --scan 1-1000 -S 192.168.0.1 Scanning 192.168.0.1 (192.168.0.1), port 1-1000 1000 ports to scan, use ...
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4answers
1k views

Filtered ports - What exactly filters them?

By the NMAP definition, unfiltered ports are the ones which cannot be determined to be open or closed since packet filtering prevents its probes from reaching the port. (ISBN 9780979958717 pag. 77) ...
2
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1answer
177 views

NMAP DNS Resolution

By default NMAP does reverse DNS resolution for a given IP which responds to the host discovery probes. My question is, what are the benefits of getting the host name when performing a network scan?
3
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2answers
858 views

Scanning multiple subnets with nmap to determine open services & ports

First off, I know nmap's documentation is very powerful and I have been reading through it rather extensively. I will be scanning externally, with permission, to determine ports & services that ...
4
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3answers
1k views

Enumerate the subdomains of a given domain - what's the point?

There're a number of security tools out there that enumerate the subdomains of a given domain. I wonder: What's the purpose of that in terms of security / hacking? Is there any way to do that other ...
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2answers
89 views

Client misunderstanding nmap [closed]

My client wants their public facing IP addresses to be secure, but thinks that running nmap port scans will draw attention from hackers. To settle this once and for all, what do you say?
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1answer
88 views

What this type of attack called? (gaining peripheral information)

When the intruder looks at the transmitted data and finds information about the sender and the receiver of the data or other peripheral information that won't help him hack the system but know more ...
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1answer
212 views

Snort - Rule: Alert all php requests

I am trying to understand writing rules for snort. Further goal is detection of sql injections like here. I've read the documentation of snort rules and created this rule: alert tcp any any -> ...
3
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1answer
222 views

Automating NIKTO scanner

I am working on NIKTO automation. I have a text file contains list of IP addresses along with their ports open. I have already made nikto script. Script functionality - it takes IP addresses and then ...
2
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2answers
814 views

nmap detects opened port but can't connect with telnet

I've made an scan to one single IP with nmap and it reports that the port 65301 is opened, and even it detects that it's maybe the service pcanywhere. sudo nmap -p 65000-65535 -sV x.x.x.x Starting ...
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1answer
105 views

Benefit of checking TCP port or UDP port [closed]

I'm studying port scanning. How can an attacker benefit from the information of checking TCP ports or UDP ports?
2
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2answers
68 views

Any way to circumvent a 'filtered' response on NMap?

I know that a filtered response on NMap means that the firewall dropped the packets or that NMap just didn't receive a response, but is there any way to circumvent this? Is it possible that the ...
4
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4answers
1k views

How to run nmap HTTP scripts on unusual ports

How can I make nmap run the HTTP-scripts on ports that are unusual for HTTP, say TCP port 123? On something like nmap -n --script="http* ..." -p123 target nmap does nothing except to check that port ...
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1answer
157 views

Caching ARP to avoid L2 detection on switched network?

Using nmap on a very large (/16) switched network can lead to an excessive number of ARP requests which can be detected by simple ARP counters listening to broadcasted ARP requests. Is there a way ...
1
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2answers
310 views

How do I check for inside-out open port? [closed]

I'm inside a corporate network and I want to assess which ports are open for outbound connection. There are such tools that do this test? I remember that years ago I used a website which performed ...