Condor defines its own netdb-related functions (proxy functions) for its own DNS system called NO_DNS.
 
 {section: What is it?}
-TCP_FORWARDING_HOST ?
+TCP_FORWARDING_HOST : it seems it used by startd. when the job (startd) tries to connect shadow and TCP_FORWARDING_HOST is defined, it connects to TCP_FORWARDING_HOST. It seems like some kind of NAT or proxy.
 
 {section: solved}
 {subsection: KeyCache}