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ASP FAQ Tutorials :: Classic ASP 1.0 :: General Topics :: Why does REMOTE_HOST return an IP address instead of a name address?
Why does REMOTE_HOST return an IP address instead of a name address?
IIS does not automatically do reverse DNS lookups - by default, Request.ServerVariables("REMOTE_HOST") is populated with the same value as Request.ServerVariables("REMOTE_ADDR") - which is simply an IP address. According to KB #245574 and KB #297795, you can configure IIS to handle DNS lookups. Barring that ability, here are some components that will facilitate it without altering IIS:
AspDNS
ASPDNS
BrowserHawk
DNS LookUp
DSDNS
DynuDNS
HexDNS
LyfDNS
Simple DNS+Traceroute
Remember that reverse DNS lookups on every request can be a significant burden on your server... so only implement one of these solutions if you really need it! Also remember that performing a reverse DNS lookup doesn't necessarily give you accurate results. Statistics Server, for example, returns the state that AT & T's regional office is in, not the state where they provide our bandwidth.
AspDNS
ASPDNS
BrowserHawk
DNS LookUp
DSDNS
DynuDNS
HexDNS
LyfDNS
Simple DNS+Traceroute
Remember that reverse DNS lookups on every request can be a significant burden on your server... so only implement one of these solutions if you really need it! Also remember that performing a reverse DNS lookup doesn't necessarily give you accurate results. Statistics Server, for example, returns the state that AT & T's regional office is in, not the state where they provide our bandwidth.
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