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+--- Thread: How to discover open ports? (/Thread-How-to-discover-open-ports)
How to discover open ports? - Hack3rcon - 01-17-2023
Hello,
In a local network, a device like the FortiGate existed and clients connecting to it for use the Internet. The traceroute output is:
Code:
$ sudo traceroute -4 google.com -I
traceroute to google.com (216.239.38.120), 30 hops max, 60 byte packets
1 192.168.1.1 (192.168.1.1) 3.090 ms 3.412 ms 3.720 ms
2 two.two.two.two (2.0.0.2) 0.692 ms 0.796 ms 0.904 ms
3 192.168.1.200 (192.168.1.200) 0.202 ms 0.181 ms 0.169 ms
...
16 any-in-2678.1e100.net (216.239.38.120) 33.692 ms 33.689 ms 33.685 msThank you.
RE: How to discover open ports? - User23 - 07-13-2023
Run nnamp with stealth scan and maybe with OS fingerprinting. Did you do a scan of the whole network? Were other devices detected?
RE: How to discover open ports? - wdc - 07-24-2023
What about Linux command "nmap -a ipaddress", but the remote must be your computer, otherwise it is illegal and can cause source IP blacklisting i think.
On the first page of the "man nmap" is an example command with explanation.
RE: How to discover open ports? - mothered - 07-24-2023
(07-24-2023, 09:10 AM)wdc Wrote: What about Linux command "nmap -a ipaddress", but the remote must be your computer, otherwise it is illegal and can cause source IP blacklisting i think.NMap Is a very effective tool.
On the first page of the "man nmap" is an example command with explanation.
Obviously there are an array of other tools that serve the same purpose.
RE: How to discover open ports? - gh05t3d - 07-30-2023
By default it scan 1000 ports. Specify -p- so it will scan all ports
RE: How to discover open ports? - rc445 - 08-15-2023
What do you mean "How can I find the port that packets pass through it?" . A firewall/router doesn't "accept" packets on a specific port. It routes (or doesn't route) all traffic based on rules.
The device will accept admin connections. Sometimes this is through a web UI or SSH. Sometimes, these devices wont accept admin connection through the LAN ports but will have a specific Management Port.
Most big organizations will segregate all their management traffic in a specific VLAN.
RE: How to discover open ports? - The_Professor - 06-17-2024
Best choice is Nmap stealth scan or if you want a user interface you can check out Fing