Questions tagged [network-scanners]

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

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27 views

Why is Nmap not working with -oG command [on hold]

I am trying to learn how to use Nmap. I am running the following command in order to scan my WIFI subnet, nmap -oG - 192.168.1.0-255 -vv It starts the scan but get stuck at the last host, 192.168.1....
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Firebase ports scanning using nmap

Purely for research purposes used nmap to check security of my application deployed to Firebase. However, there some questions which I can't understand: Why Firebase has open so many ports? Something ...
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Is there a way to identify which process starts an ARP Scan? [migrated]

I have 2 machines in my network which regularly scans the whole network 192.168.1.0/24 by sending "Who has" packets targetting every ip. I've googled it, but I didn't find a way to know which process ...
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1answer
129 views

Malicious IP addresses [closed]

I am looking for updated lists of IP addresses that belong to malware's C&C, botnets, malicious scanners, or other sort of malicious activities. Is there any public database of malicious IP ...
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1answer
76 views

Hardening against Nmap and other network scanners

It is possible to make Server respond with irrelevant data if it is scanned with Nmap? If yes, are there any examples of such SW?
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2answers
96 views

Can wireshark capture the exact payload and end point of API used by my Mobile APP?

I was just wondering if someone having total control over his/her network, is running my mobile app. Also wireshark is capturing all requests made using the network. My app is calling API endpoint ...
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1answer
59 views

Incorrect results via Nexpose, but displaying correct one with Nmap

We are scanning our network via Nexpose. Recently an asset was found vulnerable to Wannacry CVE 2017-0146 SMB Remote code execution vulnerability. However when i have tested it same through Nmap it ...
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264 views

How secure is my apartment's building wide wifi network using Spectrum Community Solutions?

Recently my apartment moved from having individual modems (with our own router/wifi network) to this Spectrum Community Solutions building wide network. Everyone can connect to the network anywhere, ...
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1answer
65 views

Finding location of malicious internal IP in Wide Area Network [closed]

Malicious Traffic detected from an internal IP in Wide Area Network (Network of multiple cities in a country). How to find the city of that IP address in Wide Area Network? There is no IP subnet by ...
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1answer
107 views

How to find out which application runs behind port 31337?

I found an open port on a "Kartina Quattro" (https://www.kartina.tv/article/247-kartina-quattro). It's a device for watching russian TV channels. The port number is 31337 and the Service is called ...
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1answer
113 views

Advice to detect suspicious activities on network

A private network (about 150 PCs) is connected to the internet through an edge router. According to the net admin, his network is scanned from the outside, at the edge router. I don’t have any more ...
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4answers
532 views

Router Receiving Unknown Packets from the Same IP and Port Even After Address Rotations - How?

One of our client's routers is receiving packets from the same source IP address and port repeatedly, even when the router is rebooted and obtains a fresh dynamically assigned IP address, and while no ...
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213 views

Open ports on my NetGear router

I ran an nmap scan on my home router and I am seeing a ton of open ports. Is this normal? How do I go about closing them? $ nmap 192.168.1.1 Starting Nmap 7.70 ( https://nmap.org ) at 2019-03-16 20:...
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Nmap showing different open ports every few seconds [duplicate]

I'm running Nmap on an Amazon Web Services EC2 instance but between runs just a couple seconds apart, I'm getting new results. Is this normal? I'm seeing open ports then they don't show. I'm running ...
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1answer
496 views

NMAP results inconsistent

I'm doing a NMAP scan that runs continuously. For some reason the results are not consistent. Sometimes it detects all the connected devices of the local network and sometimes only some of them. ...
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1answer
258 views

TCP Scans vs SYN Scans in port scanning

What is the difference between TCP Scans and SYN Scans?
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2answers
277 views

nmap - Difference between “Filtered” and “Admin-Prohibited”

I am a rather new user to nmap. By using some Google-Fu, I am still not able to ascertain what is the criteria used in order to distinguish "filtered" ports from "admin-prohibited" as they both seem ...
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2answers
305 views

Is there a way to see if an nMap scan in the background is progressing?

I have launched an nMap scan from an Ubuntu machine with the following parameters: nmap -Pn -T3 -sS -sV -iL /home/tsouser/Desktop/Scope.txt --reason --top-ports 100 --max_rtt_timeout 200ms --...
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3answers
9k views

Does a fake SSH server have any purpose security-wise?

I stumbled upon this sshesame software which appears to imitate an SSH server accepting any username/password, only instead of executing the subsequent shell commands it logs them in a file. What I ...
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142 views

Why nmap password scanner completes in 10 seconds and doesn't give any result?

I'm completely new to nmap and I'm trying to brute force passwords on a target. A command that I'm trying is: nmap -p 80 --unprivileged --script http-form-brute <target> But instead of "...
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1answer
173 views

XMAS Scan vs Inverse TCP

Whats the difference between a XMAS Tree scan and an Inverse TCP scan using the FIN, URG, and PSH flags? Are they the same thing? XMAS Tree scans are designed to manipulate the PSH, URG and FIN flags ...
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2answers
140 views

Should ports be visible to nmap?

I'm currently working on the firewall when I discovered that the firewall exposes a lot of ports outside of the internal network. I discovered this when setting up a new FTP server using a basic nmap ...
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1answer
121 views

How do I know that the request and response is using encryption protocols in burp suite?

I know these things can easily be done on wireshark, tshark, etc but is it possible to know that the request I forwarded and the response I received is using protocols such as TLS, TLSv1.2, TCP, HTTP, ...
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1answer
154 views

Can you scan unmanaged switches with vulnerability scanners?

The target switches do not have IP addresses and most scanners require IPs as targets. Can you scan unmanaged switches with vulnerability scanners? What scanners can target layer 2?
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110 views

Router detects my Nessus scan and kicks me off the network [closed]

I'm trying nessus on a public router. When I run a scan on the router at 10.0.0.1, the router somewhat detects it and proceeds to kick me off. If I put targets : 10.0.0.2-10.0.0.255 (scann all ...
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1answer
316 views

NMAP reporting all ports open

I'm trying to scan my targets for open ports. However, NMAP reports all of them as 'open'. I know there's a firewall in between. I tried the SYN scan, and when I check the traffic in WireShark I see ...
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3answers
268 views

Nmap scanning single port too fast? Shows as filtered?

I ran into an issue when trying to scan a single port on a single machine. I ran a range scan to find machines with port 25 open. Then I just arbitrarily chose one to work on. I scan that machine with ...
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1answer
53 views

What is an excessive amount of SYN requests for port scanning?

I have a slow internet connection - about 12Mb/s. In 10 minutes I have detected a distributed port scan on the router from different IPs. I have counted these SYN packets at in 600 seconds (10 minutes ...
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208 views

Connected devices to router are hidden

I was scanning devices connected to my WiFi with netdiscover(Kali linux).I was unable to find any device. I only get Router's IP and MAC address. It does not show any device although i have connected ...
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2answers
203 views

How to find and ban some devices from my wifi using the command line? [closed]

I use Arch Linux. I just installed some packages such as nmap, netdiscover and others. It is a ubiquiti internet network, for the sharing of connection to several routers. There are about 7 routers ...
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2answers
137 views

Am I being Hacked? So many defferent ip's in router firewall logs [duplicate]

My router dsl light was not stable; It keept disconnecting and connecting..So I logged into Router Homepage to check whats wrong and found there were so many different ip's in Router firewall logs I ...
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2answers
142 views

Get IP address of camera

Is it possible to get the global IP address of a nearby camera? For example, an IP camera that is connect to a network, but you are not on that network, and cant get access for whatever reason) but ...
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1answer
271 views

How to detect a scan on a local machine?

Is there any way to detect a scan on the local machine ( the pc that I'm using with a linux os -ubuntu-) from the network that I'm connected to? I know that for the webservers we could check the ...
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3answers
565 views

What are some instant red flags when scanning an network with nmap

When doing an Nmap scan from an external network, what open ports should be an instant red flag? For example, if I was in the open internet and scanned www.somewebsite.com, besides port 22, what other ...
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2answers
202 views

Nmap and it default scripts when I already know some of the information

I am a network guy and not a “hacker” or whatever the official term is these days. I’ve been learning how to use nmap as I think it’s a great tool for just keeping the network secure. The thing is ...
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37 views

Is it possible to circumvent (ignore) routing table without root permissions?

The local host is configured to send all non-local traffic to a restrictive firewall VM configured in the routing table (route). Preliminary scanning shows that other routers are available on the ...
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2answers
148 views

How to scan allowed outbound (destination) ports on the local host?

Without access to firewall rules, I want to scan allowed outbound (destination) ports on the local machine. I would take too long to start a netcat listener for each of the destination ports on a ...
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2answers
615 views

Multiple Open ports on a server, is that safe? [closed]

Using nmap I try to scan a server as a result I get multiple open ports. For example when I try to scan domain.com as a result: 7/tcp open echo 9/tcp open discard 13/tcp open daytime 21/tcp filtered ...
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1answer
392 views

How to “Scan for hosts” only using ettercap (“text”) terminal interface?

I've been looking for a command to "Scan for hosts" in terminal ("text") ettercap. Do anyone knows how to scan the local subnet from the ettercap terminal? The graphical ("gtk") ettercap has the ...
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2answers
2k views

Xmas Scan Versus FIN Scan

While studying Nmap, I came across different port scans. Out of these XMAS and FIN scan caught my interest. Though XMAS scan sends FIN, URG and RST flags, the response is the same as that of a FIN ...
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1answer
204 views

What are some IDS/IPS that are able to detect stealth scans done in nmap today? [closed]

I was informed that these scans are no longer "stealth"
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2answers
84 views

Identification of TLS POODLE Vulnerability

How can I identify whether the remote server is vulnerable to TLS POODLE vulnerability? Although, there are online scanners such as Qualys SSL Labs. As per my understanding, these online scanners do ...
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1answer
2k views

How to control the ciphersuites in nmap “ssl-enum-ciphers”

There is a script for enumerating the TLS versions and ciphersuites ofered by a server provided by nmap. See this link. Is there a way that allow me to specify the verisions and ciphersuites I want ...
2
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1answer
83 views

Named connections all over the world

I just started working for a small business and run their server. The entire thing is on macOS, and I've been monitoring my network lately due to some weird things in a few log files. I've come ...
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1answer
650 views

Detect and Scan Open Ports

I am trying to understand two questions - I run Qualys/Nessus scans on periodic basis in our Azure/AWS environment and always run into issues while detecting for Open ports, A basic nmap scan would ...
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1answer
389 views

Black Box penetration testing in private network

I came across a scenario where an organization is using micro-service architecture. They are using Amazon AWS as a web service and Kubernetes to maintain micro-services. All the EC2 instances are in ...
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2answers
6k views

NMAP - Closed vs Filtered

A lot of people seem to ask this question, as there are a bunch of posts about it; however I feel like none truly answer the question (that I have found). I want to understand why NMAP decides to ...
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3answers
2k views

How to get shodan to report IP addresses with a specific open port?

I've done the leg work and I've struggled to identify how to search with the Shodan CLI, or the web search, just for a specific port and output all the IP addresses that expose this port. For ...
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1answer
260 views

Nessus Target Availability

I need to write a script (I am not asking for script !) in order to verify if target Servers are available (Up or Down) for Nessus scan or not. The problem is that, sometimes even if ping does not ...
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0answers
138 views

scapy Deauthentication address understanding

I have the problem to understand from_DS, to_DS with Deauthentication packet, deauthentication packets are type=Managment, FCfield managment and control frames always FROM_DS = 0 , TO_DS=0, ...