What is binding this port?

Question

Something is serving content on my port 80, but I don't know what process is doing this. Is there any way to find out what process is bound to which port(s)?

Update: This is the output of netstat... sadly, nothing appears to be binding port 80. Though my port 80 is still serving information. Is this impossible, or am I missing something? (see below)

Update: After running netstat -anbo and cross-referencing with the processes in the taskmanager, I've found out that skypekit.exe is binding my port 80. However, any further exploration of this problem will probably fall outside of the scope of this question. Just to add, Trillian was using ports 80 and 443 for skypekit.exe and its traffic.

PS D:\> netstat -anbo

Active Connections

  Proto  Local Address          Foreign Address        State           PID
  TCP    0.0.0.0:80             0.0.0.0:0              LISTENING       6664
 [skypekit.exe]
  TCP    0.0.0.0:135            0.0.0.0:0              LISTENING       1280
  RpcSs
 [svchost.exe]
  TCP    0.0.0.0:443            0.0.0.0:0              LISTENING       6664
 [skypekit.exe]
  TCP    0.0.0.0:445            0.0.0.0:0              LISTENING       4
 Can not obtain ownership information
  TCP    0.0.0.0:1025           0.0.0.0:0              LISTENING       916
 [wininit.exe]
  TCP    0.0.0.0:1026           0.0.0.0:0              LISTENING       1480
  eventlog
 [svchost.exe]
  TCP    0.0.0.0:1027           0.0.0.0:0              LISTENING       1568
  Schedule
 [svchost.exe]
  TCP    0.0.0.0:1028           0.0.0.0:0              LISTENING       980
 [lsass.exe]
  TCP    0.0.0.0:1029           0.0.0.0:0              LISTENING       568
 [spoolsv.exe]
  TCP    0.0.0.0:1030           0.0.0.0:0              LISTENING       956
 [services.exe]
  TCP    0.0.0.0:2987           0.0.0.0:0              LISTENING       308

Answer 1

Try netstat -anb

C:\> netstat -anb

Active Connections

  Proto  Local Address          Foreign Address        State           PID
  TCP    0.0.0.0:80             0.0.0.0:0              LISTENING       1724
  [Apache.exe]

---

Update: That a in -anb is there for a reason!

C:\> netstat /?

Displays protocol statistics and current TCP/IP network connections.

NETSTAT [-a] [-b] [-e] [-n] [-o] [-p proto] [-r] [-s] [-v] [interval]

  -a            Displays all connections and listening ports.
                                         ^^^^^^^^^^^^^^^^^^^^
                                         ||||||||||||||||||||

Answer 2

For future reference, Sysinternals has a lot of great tools for discovering what is happening on your machine. tcpview, for example, gives you real-time monitoring of TCP/UDP sockets, filemon can show you activity related to file accesses ... the list goes on.

Answer 3

Just run this PowerShell command and you'll see the name of the process listening on e.g. 443.

Get-Process -Id (Get-NetTCPConnection -LocalPort 443).OwningProcess

Handles NPM(K)    PM(K)     WS(K)     CPU(s)     Id SI ProcessName
------- ------    -----     -----     ------     -- -- -----------
    143     15     3448     11024             4572 0 MySuperServer

Answer 4

One way is to use netstat -anbo

Active Connections

  Proto  Local Address          Foreign Address        State           PID
  TCP    0.0.0.0:21             0.0.0.0:0              LISTENING       7908
 [filezillaserver.exe]
  TCP    0.0.0.0:135            0.0.0.0:0              LISTENING       468
  RpcSs
 [svchost.exe]
  TCP    0.0.0.0:443            0.0.0.0:0              LISTENING       4588
 [vmware-hostd.exe]

after stopping the vmware-hostd it should be up.