Re: Protocol

Elisa Hoffman <elisa_hoffman@hp.com> wrote: > Has anyone connected to an Informix UNIX database through a firewall? > Your firewall should not filter out the used Informix port -> see sqlhosts/services entries. > How does INFORMIX (on UNIX) using I-NET, via ISQL, validate and confirm > who the remote client is? > - Is DNS used? If so, is the lookup based on IP address, where > server name must be resolved. The Informix Server makes a normal gethostbyaddr() with the clients IP address and compares this (converted hostname) string with /etc/hosts.equiv . > > - If the client server IP address and name are added to /etc/hosts > on the database server, would Informix dynamically pick up the > additional entry if the system is configured so that lookup first > occurs on the /etc/hosts file before checking DNS? This depends on your network name resolver configuration. (normally /etc/resolv.conf ) There you can configure if /etc/hosts, DNS or YP/NIS will be used and in which order. Note that in case of rejecting a connection the online server writes an entry in its logfile with the resolved network name of the client maschine. If you add this entry (without the username@) to /etc/hosts.equiv the connection should work. example: 13:54:08 listener-thread: err = -956: Client host or user(my_username@clienthost.domain) is not trusted by the server. so you should add "clienthost.domain" to "/etc/hosts.equiv". Hope this helps Uwe