Scan open ports?

Is there a secured web site or a appz to scan and find open ports on my pc? My computer has infected. I think its trojan.. Which firewall can u prefer?
Answer #1
Dunno what du u mean by open ports, but you could use avira with comodo firewall.
Answer #2
go tu start > run.
type in cmd
then type netstat to check open port on ur pc.
i normally use : netstat -na
further explanation : netstat help
hope this is wat u want.
p/s: port that been opened by virus might be invisible on this.
Answer #3
CurrPorts 1.80
Short description: CurrPorts displays the list of all currently opened TCP/IP and UDP ports on your local computer. In addition, CurrPorts allows you to close unwanted TCP connections, kill the process that opened the ports, and save the ports list to file, and more….

http://www.download3k.com/DownloadLink1-CurrPorts.html
or
http://www.nirsoft.net/utils/cports.html
ps : + 1 for comodo firewall
Answer #4
Try Gibson Research Group’s online ShieldsUP test. It can scan your ports for vulnerabilities and detects open ports.
https://www.grc.com/x/ne.dll?bh0bkyd2
Hope this helps. Cheers!
Answer #5
thanks XeseX
nice site. Happy new year
Your Internet port 139 does not appear to exist! One or more ports on this system are operating in FULL STEALTH MODE! Standard Internet behavior requires port connection attempts to be answered with a success or refusal response. Therefore, only an attempt to connect to a nonexistent computer results in no response of either kind. But YOUR computer has DELIBERATELY CHOSEN NOT TO RESPOND (that's very cool!) which represents advanced computer and port stealthing capabilities. A machine configured in this fashion is well hardened to Internet NetBIOS attack and intrusion.
Unable to connect with NetBIOS to your computer.
All attempts to get any information from your computer have FAILED. (This is very uncommon for a Windows networking-based PC.) Relative to vulnerabilities from Windows networking, this computer appears to be VERY SECURE since it is NOT exposing ANY of its internal NetBIOS networking protocol over the Internet.
Answer #6
You’re welcome and a happy new year to you too, mate.
Answer #7
Try Gibson Research Group's online ShieldsUP test. It can scan your ports for vulnerabilities and detects open ports.
https://www.grc.com/x/ne.dll?bh0bkyd2
Hope this helps. Cheers!
Very handy indeed, I got a True Stealth rating! GRC Port Authority Report created on UTC: 2009-12-30 at 15:05:49
Results from scan of ports: 0, 21-23, 25, 79, 80, 110, 113,                             119, 135, 139, 143, 389, 443, 445,                             1002, 1024-1030, 1720, 5000
    0 Ports Open
    0 Ports Closed
   26 Ports Stealth
---------------------
   26 Ports Tested
ALL PORTS tested were found to be: STEALTH.
TruStealth: PASSED - ALL tested ports were STEALTH,
                   - NO unsolicited packets were received,
                   - NO Ping reply (ICMP Echo) was received.