This article applies to:

• Trustwave MailMarshal (SEG)
• WebMarshal

Question:

Information:

You can use the NETSTAT command to check the operation of local ports to see if they are configured properly and if they are receiving data.

You can access a wealth of helpful information about the NETSTAT utility from the Help utility on your Microsoft Windows workstation or server. This information can be found by clicking START | HELP | INDEX and by entering the keyword netstat.

• Note 1: DNS is the acronym for Domain Name Service, a name resolution scheme that originated with the Berkeley version of Unix. DNS is used throughout the Internet for host-name resolution and is a constantly evolving protocol. Along with host-name resolution, it helps in e-mail routing and other TCP/IP-based application services. The most popular Unix-based implementation of DNS is the Berkeley Internet Name Daemon, or BIND.
  • SEG/MailMarshal SMTP uses DNS port 53 TCP and UDP.
• Note 2: WINS is the acronym for Windows Internet Naming Service, Microsoft's extension of the NetBIOS name resolution scheme. Computers utilize port 137 for WINS resolution.
  • If WINS resolution is enabled, local machine names can be resolved without explicit DNS entries.

Once you type the command, look for a response:

 

• If nothing appears, the port is not being utilized.
  • If you are checking the response from a Marshal product, check to see if the appropriate service is running. If it is, you may need to restart the server computer and run NETSTAT again.

• If the word "ESTABLISHED" appears, then the port is configured properly and it is receiving data.

   

• If the words "TIME-WAIT" appear, the port is configured properly but it is not receiving data.

This article was previously published as: entries

NETIQKB2609