TCP Utilities View


The TCP/IP utilities provide diagnostic and connectivity tools for connecting to other systems, network administration and troubleshooting.

DameWare NT Utilities provides a single window view where numerous TCP/IP utility commands can be performed in a MDI client window. The following options are available for selection from the tab options located in the middle of the TCP/IP window.

Trace Route  This diagnostic utility determines the route taken to a destination by sending Internet Control Message Protocol (ICMP) echo packets with varying Time-To-Live (TTL) values to the destination. Each router along the path is required to decrement the TTL on a packet by at least 1 before forwarding it so the TTL is effectively a hop count. When the TTL on a packet reaches 0, the router is supposed to send back an ICMP Time Exceeded message to the source system. Trace Route determines the route by sending the first echo packet with a TTL of 1and incrementing the TTL by 1 on each subsequent transmission until the target responds or the maximum TTL is reached. The route is determined by examining the ICMP Time Exceeded messages sent back by intermediate routers. Notice that some routers silently drop packets with expired Time-To-Live (TTL)s and will be invisible to Trace Route.

Ping  Verifies connections to a remote computer or computers. This command is available only if the TCP/IP protocol has been installed.

MX Test  Used to perform a lookup for the MX (mail exchange) resource record for the specified domain.    

DNS Lookup This diagnostic tool displays information from Domain Name System (DNS) name servers. Before using this tool you should be familiar with how DNS works. DNS Lookup is available for DNS Lookup from within the TCP/IP tools window view of DameWare NT Utilities.

 A The "A" (address) resource record maps a host (computer or other network device) name to an IP address in a DNS zone.

 NS The name server resource record which identifies the DNS server or servers for the DNS domain. NS resource records appear in all DNS zones and reverse zones (those in the DNS domain).

 CNAME The host name portion of a URL may actually be an alias and is also referred to as a canonical name. In the address,, www is an alias commonly used for World Wide Web servers, Microsoft is the domain name and .com indicates the commercial branch of the DNS hierarchy of names for the Internet. The CNAME resource record is used to establish an alias name in DNS server zone files. CNAMEs are frequently used in conjunction with Web, FTP and Gopher servers and when a host name is changed. The use of CNAMEs is accepted on the Internet for generalized names for servers such as www to indicate a Web server. However, other uses of the CNAME records can create problems for DNS name resolution throughout the Internet. RFC 1912, which describes common errors in the creation of DNS resource records, states: "Don’t use CNAMEs in combination with RRs (that is, resource records) which point to other names like MX, CNAME, PTR and NS."

Resolve When selected resolves the Machine or IP entered to the corresponding Host Name and IP address.