Security scanner for computers and networks.

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2
votes
1answer
2k views

Scan multicast IP range on specific port using nmap

I'd like to scan a multicast IP range on a specific port using nmap. When I try to simply do a nmap -p 10000 239.35.0.0/16, it just responds with an error stating Strange error from connect ...
3
votes
2answers
282 views

Which ports are potential security risks for nmap?

I'm using nmap and I am having trouble finding which ports are dangerous and pose the greatest security risks. Which ports are potential security risks for nmap? I was thinking samba, telnet, vnc ...
4
votes
3answers
10k views

How to bypass tcpwrapped with nmap scan

I'd a scan task and I faced following result Host is up (0.032s latency). Scanned at 2012-10-25 16:06:38 AST for 856s PORT STATE SERVICE VERSION 1/tcp open tcpwrapped 3/tcp open ...
1
vote
1answer
1k views

Nmap port scan and FTP bounce

Suppose that there is a network of machines, and there is a server with ftp server that allows ftp bounce. I do a nmap scan on the network nmap -sC -some other parameters network address. Does nmap ...
5
votes
2answers
731 views

How can I use nmap to distinguish between a normal linux machine and an android device?

According to this link: here, nmap 5.2 onwards is now supposed to detect android smartphones. I am using nmap 6.01 but it only identifies android devices as running a linux kernel.
3
votes
1answer
2k views

Nmap scan produces all “unknown”

I scanned both localhost, and the IP address of the LAN adapter, and this is the produced output. Starting Nmap 5.51 ( http://nmap.org ) at 2012-10-12 18:06 Eastern Daylight Time Skipping SYN Stealth ...
1
vote
2answers
232 views

Changing IP ID generation of a server

I've seen plenty about Idle Scans and incremental IP IDs on the net, but I have trouble finding a "solution" to the problem. Is there a way to "set" IP IDs for example to all zeros or is it coded into ...
4
votes
4answers
965 views

How can I scan open ports without being traced back

I would like to scan open ports of a server. But as far as I know, when I try to scan the open ports with something like nmap in shell they would be able to trace me. Is there a way to secure this ...
1
vote
2answers
102 views

Correct way of establishing if the switch is sending syslogs?

I want to confirm through scanning means if the switch is sending syslog packets or not. What i did was run a nmap scan nmap -sV -p514 xxx.xx.xx.xx The result came out as closed. Does this ...
1
vote
2answers
1k views

Found Unusual Services running on my VPS

I am running a Debian VPS and i did a port scan and found these services 135/tcp filtered msrpc 139/tcp filtered netbios-ssn 445/tcp filtered microsoft-ds 593/tcp filtered http-rpc-epmap 1720/tcp ...
6
votes
2answers
3k views

Scanning my network with NMAP

Each computer is assigned one ip address on my network, and my ISP supplies one IP for my network. If I try to scan the ip supplied by my ISP what I got is the OS running on the router, running on the ...
7
votes
5answers
4k views

How to detect hosts running in virtual machines with nmap?

I have to determine if a given subnet has virtual hosts. Are there any ideas about what switches to use?
3
votes
2answers
4k views

Could Nmap scan switches/routers

Nmap can scan and sometimes successfully detect the running OS in the remote host. However, can nmap scan routers and switches? Most of them use an embedded system.
5
votes
4answers
724 views

Persisting and comparing NMAP scans

Does anyone have any good recommendations on a good tool for persisting NMAP scans to database? It may be a tool for persisting or simply a java library for easy parsing of the nmap xml scan result ...
1
vote
2answers
314 views

is it possible to test out remote host by using nmap?

I was trying to test out my friend's computer (with agreement) by using nmap remotely. But the result I got seems kinda awkward to me. It only showed 1900 as tcpwrapper and all other ports were no ...
2
votes
2answers
2k views

NMAP DNS Service Detection

I was looking out how NMAP identifies DNS services. After determining that port 53 is open it issues a standard query TXT version.bind to find out if BIND is running on the domain port. Then, I saw ...
1
vote
2answers
85 views

NMAP SSMTP Service Detection

When I examined a NMAP -sV scan on a host running Exim on port 465, it uses the standard SYN scan to determine if the port is open, and then issues a Client Hello to which the server responds with a ...
0
votes
1answer
309 views

NMAP Commands Used in Option -A

I've found that using the command nmap -A gives me the most reliable results and according to the reference guide the option -A includes service detection, traceroute, and OS detection. I want to do ...