The TCP/IP utilities in this view provide diagnostic and connectivity tools for connecting to other systems, network administration and troubleshooting. The DameWare Remote Support TCP Utilities view is a single window view from which you can execute all of the available utilities. Remote Support displays the following utilities on their own tabs within the TCP Utilities view.
This diagnostic tool displays information from Domain Name System (DNS) name servers. Before using this tool you should be familiar with how DNS works. The DNS Lookup tab provides the following DNS Record Type options:
A: The address (A) resource record maps a host (computer or other network device) name to an IP address in a DNS zone.
NS: The name server (NS) resource record identifies the DNS server or servers for the DNS domain. NS resource records appear in all DNS zones and reverse zones (those in the in-addr.arpa DNS domain).
CNAME: The host name portion of a URL may actually be an alias and is also referred to as a canonical name (CNAME). We can break down the address, http://www.microsoft.com, like so:
DNS uses the CNAME resource record 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 [resource records] which point to other names like MX, CNAME, PTR and NS."
This diagnostic tool verifies connections to a remote computer or computers. This command is available only if the TCP/IP protocol has been installed. Remote Support also displays the Ping option in the Network Browser under TCP Utilites.
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 1, and then 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.
Some routers silently drop packets with expired TTLs and will be invisible to Trace Route.
This diagnostic tool performs a lookup for the MX (mail exchange) resource record for the specified domain.
This diagnostic tool resolves the hostname or IP you enter into the Machine/IP Address field to the corresponding hostname and IP address.