unknown udp connections

[eeeboy]

Just a few mins ago I made this

netstat -a

and got this

Active Connections

  Proto  Local Address          Foreign Address        State
  TCP    powershell:epmap       powershell:0           LISTENING
  TCP    powershell:microsoft-ds  powershell:0           LISTENING
  TCP    powershell:1025        powershell:0           LISTENING
  TCP    powershell:1040        powershell:0           LISTENING
  TCP    powershell:1058        localhost:1059         ESTABLISHED
  TCP    powershell:1059        localhost:1058         ESTABLISHED
  TCP    powershell:1061        localhost:1062         ESTABLISHED
  TCP    powershell:1062        localhost:1061         ESTABLISHED
  TCP    powershell:netbios-ssn  powershell:0           LISTENING
  TCP    powershell:1044        by2msg2104615.phx.gbl:1863  ESTABLISHED
  TCP    powershell:1067        64.86.94.34:http       CLOSE_WAIT
  TCP    powershell:1068        64.86.94.34:http       CLOSE_WAIT
  TCP    powershell:1485        208.70.78.148:http     ESTABLISHED
  TCP    powershell:1503        65.54.195.185:http     LAST_ACK
  TCP    powershell:1562        65.54.195.185:http     CLOSE_WAIT
  TCP    powershell:1564        www20.thny.bbc.co.uk:http  ESTABLISHED
  TCP    powershell:1565        64.86.94.10:http       ESTABLISHED
  TCP    powershell:1566        www20.thny.bbc.co.uk:http  ESTABLISHED
  TCP    powershell:1567        www20.thny.bbc.co.uk:http  ESTABLISHED
  TCP    powershell:1568        www44.thny.bbc.co.uk:http  ESTABLISHED
  TCP    powershell:1569        63.147.175.37:http     TIME_WAIT
  TCP    powershell:1570        www44.thny.bbc.co.uk:http  ESTABLISHED
  TCP    powershell:1571        content.cricinfo.com:http  ESTABLISHED
  TCP    powershell:1572        content.cricinfo.com:http  ESTABLISHED
  TCP    powershell:1573        img.cricinfo.com:http  ESTABLISHED
  UDP    powershell:microsoft-ds  *:*
  UDP    powershell:isakmp      *:*
  UDP    powershell:1026        *:*
  UDP    powershell:1027        *:*
  UDP    powershell:1039        *:*
  UDP    powershell:1056        *:*
  UDP    powershell:1088        *:*
  UDP    powershell:1089        *:*
  UDP    powershell:1090        *:*
  UDP    powershell:1091        *:*
  UDP    powershell:4500        *:*
  UDP    powershell:ntp         *:*
  UDP    powershell:1032        *:*
  UDP    powershell:1033        *:*
  UDP    powershell:1900        *:*
  UDP    powershell:discard     *:*
  UDP    powershell:ntp         *:*
  UDP    powershell:netbios-ns  *:*
  UDP    powershell:netbios-dgm  *:*
  UDP    powershell:1900        *:*
  UDP    powershell:42510       *:*

upto

  TCP    powershell:1573        img.cricinfo.com:http  ESTABLISHED

it was ok for me as I am used to see these entries. But waht about after that ? What-is Microsoft-ds and other udp connections ?

hope to hear from you.

regards
eeeboy

[Will.Spencer]

  UDP    powershell:microsoft-ds  *:*
  UDP    powershell:isakmp      *:*
  UDP    powershell:1026        *:*
  UDP    powershell:1027        *:*
  UDP    powershell:1039        *:*
  UDP    powershell:1056        *:*
  UDP    powershell:1088        *:*
  UDP    powershell:1089        *:*
  UDP    powershell:1090        *:*
  UDP    powershell:1091        *:*
  UDP    powershell:4500        *:*
  UDP    powershell:ntp         *:*
  UDP    powershell:1032        *:*
  UDP    powershell:1033        *:*
  UDP    powershell:1900        *:*
  UDP    powershell:discard     *:*
  UDP    powershell:ntp         *:*
  UDP    powershell:netbios-ns  *:*
  UDP    powershell:netbios-dgm  *:*
  UDP    powershell:1900        *:*
  UDP    powershell:42510       *:*

Those are UDP ports on your system which are listening. The *.* shows that no one is (currently) talking to them.

This is not a worry if you are protected by any reasonable firewall.

[eeeboy]

Reasonable ?

sp2 + Zone Alarm Pro = is it reasonable ?

[eeeboy]

one more observation. I am getting these udp entries only if I put an "-a" argument after netstat command.

If I put straitcut netstat, theres no such entries like that !

[Will.Spencer]

Originally Posted by eeeboy

sp2 + Zone Alarm Pro = is it reasonable ?

I never feel good with just a firewall running on the same PC.

I always put a LinkSys (etc...) between me and the network edge.

And, nicely, the LinkSys also provides 802.11b/g.

Originally Posted by eeeboy

one more observation. I am getting these udp entries only if I put an "-a" argument after netstat command.

If I put straitcut netstat, theres no such entries like that !

The "-a" stands for "all", it gives you the full output of netstat.

Another useful option is "-n", which tells nslookup to use IP addresses instead of looking up domain names.

But wait, there's more...

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.