On Tue, Mar 27, 2007 at 06:09:33PM +0800, Jayan Chirayath Kurian wrote:
> (1) By enabling Telnet service on the DB server, through services.msc,
> client was able to get connected to the DB server. 

As someone else noted, you definitely do not want telnet running on the
server. The use suggested by Stuart was to make sure you could connect
to the postgres tcp port (5432).

> (2) While giving telnet dspace.student.main.ntu.edu.sg 5432 from the
> client, the connection was getting refused. The message displayed was
> "Could not open connection to the host, on port 5432: connection failed"

On the database server, try running

lsof -i tcp:5432

This will let you know whether anything is listening on tcp port 5432.
If it isn't, then postgres has been set up incorrectly. Check to see
what arguments were passed to postgres at startup by running

ps ax | grep post

Which should show something like this:

[EMAIL PROTECTED] ~ $ ps ax | grep postmaster
31529 ?        S      0:20 /usr/bin/postmaster -i

Note the -i flag which means my postmaster is listening for tcp
connections.

> (3) In the server, pg_hba was modified to include a single line that
> gives the IP address/subnet of client. 
> 
> host    all         all         155.69.24.194         255.255.255.0
> trust

That looks fine, but I wouldn't use 'trust' unless you're restricting
access to that machine by some other means; 'md5' would be safer.

> (4) In the server, postgresql.cfg file was modified to include 
> 
> tcpip_socket=true
> 
> listen_addresses = '*'  

That looks fine.

I'd check the scripts used to start postgres (usually in /etc/init.d/).
Just make sure the -i flag is being passed at startup. What operating
system is the database server running?

Jim

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