My Internet connection has been slow lately, and I think it might be a possible attack. A friend has told me to use Wireshark, but it is a big install, and I do not have the time to learn how to use it. Is there an easier way to see all the connections on my PC so I can take further action?
You are looking for the
netstat command. This command should provide what you're looking for:
if you would also like to see what programs are using the specified ports you can use:
to use the netstat program:
- Go to the start menu (or press Win + r and skip to step 3)
- If on XP, click "Run", If on vista or later, search for
cmdin the search box and skip to step 4.
- a list of all open connections with their ports will be displayed
more info about netstat:
C:\Documents and Settings\Administrator>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. -b Displays the executable involved in creating each connection or listening port. In some cases well-known executables host multiple independent components, and in these cases the sequence of components involved in creating the connection or listening port is displayed. In this case the executable name is in  at the bottom, on top is the component it called, and so forth until TCP/IP was reached. Note that this option can be time-consuming and will fail unless you have sufficient permissions. -e Displays Ethernet statistics. This may be combined with the -s option. -n Displays addresses and port numbers in numerical form. -o Displays the owning process ID associated with each connection. -p proto Shows connections for the protocol specified by proto; proto may be any of: TCP, UDP, TCPv6, or UDPv6. If used with the -s option to display per-protocol statistics, proto may be any of: IP, IPv6, ICMP, ICMPv6, TCP, TCPv6, UDP, or UDPv6. -r Displays the routing table. -s Displays per-protocol statistics. By default, statistics are shown for IP, IPv6, ICMP, ICMPv6, TCP, TCPv6, UDP, and UDPv6; the -p option may be used to specify a subset of the default. -v When used in conjunction with -b, will display sequence of components involved in creating the connection or listening port for all executables. interval Redisplays selected statistics, pausing interval seconds between each display. Press CTRL+C to stop redisplaying statistics. If omitted, netstat will print the current configuration information once.
Prio (http://www.prnwatch.com/prio.html) can provide, as part of the Windows Task Manager, an updating list connections with some additional context that may help you make sense of what is going on.
Another alternative is Extensoft Free Task Manager Extensions
You can see the active ports aligned with the processes in use.
It adds a lot of functionality to the task manager and it is all contained in one area.
I am not a computer scientist but I find that netstat is a bit slow and many connections pass through unrecorded, wireshark is fast but has too many packets to filter through and windows resource monitor is too hard to look through the list to see who is making connections.
The easiest way I could come up with is going into your antivirus software and in the firewall section add the program to the list of blocked programs (or add it to the list of allowed programs and edit it to blocked). You should get a warning if you open a file of that program and it tries to connect or the program just tries to connect.See the security history of your antivirus to get a list of suspicious connections.
P.S. If you want to see all connections your computer is making I think wireshark is the best. Filter with your mac address: eth.addr==xyz