[postgis-users] Mapserver and Postgis

Obe, Regina DND\MIS robe.dnd at cityofboston.gov
Tue Mar 28 05:30:34 PST 2006

It could be that your webserver doesn't allow outbound connections on
5432 because it has a firewall in front blocking.  As Greg mentioned it
sounds like you aren't connecting at all.

Do you have root access to your webserver?

-----Original Message-----
From: postgis-users-bounces at postgis.refractions.net
[mailto:postgis-users-bounces at postgis.refractions.net] 
Sent: Tuesday, March 28, 2006 8:02 AM
To: PostGIS Users Discussion
Subject: Re: [postgis-users] Mapserver and Postgis

Many thanks but there is notthing on the  postgresql-Tue.log :-( .

I can start and stop the postgresql without problem. I use postmaster -D


Another thing. How can I ping using mapserver ?
Another thing2:I can log to postgis using ssh connection (as root and 
after as postgres user).
Another thing3:There is no password to postgis ( linux )user. The 
postgis (database) user has yes a password (and I used on the map file)

I hope  you could understand my enviroment.


Gregory S. Williamson escreveu:
> Ezequias --
> What does the postgres log say ? That's a good place to start 
> debugging this.
> The text that you quoted has several very good suggestions; assuming 
> that the connection string seems rational to you, i.e. user, password,

> server and database are all sane, I would suggest making sure that you

> can can ping the postgres server from the mapserver ... if so
> Check the postgres log and see if it is refusing the connection. if it

> is you need to add the postgres user (not a great idea to exposte the 
> DBA account as a working account, but that's another issue) and the IP

> address to the .hba file on the postres server. That file controls who

> can connect and can't; it is in the root of the directory the postgres

> database was created in.
> If there is nothing in the log I'd suspect the TCP issue, or some 
> routing issue since postgres will write a useful message if an 
> un-authorized user tries to connect. Presumably the postgres user has 
> permissions to connect to the database and access the tables.
> It is possible the postgres instance was not started with the proper 
> to allow TCP/IP connections; that is controlled by the script that 
> starts the postgres database. I'm not sure if the error log would show

> anything in this case.
> HTH, post back your results and maybe others can help more.
> Greg Williamson
> GlobeXplorer LLC
> -----Original Message-----
> From:	postgis-users-bounces at postgis.refractions.net on behalf of
Ezequias Rodrigues da Rocha
> Sent:	Tue 3/28/2006 4:35 AM
> To:	PostGIS Users Discussion
> Cc:	
> Subject:	[postgis-users] Mapserver and Postgis
> Hi list,
> I don't know if this is a off-topic, but as nobody from mapserver 
> could
> solve my problem I will report to you now.
> I am trying to connect my mapserver project to PostGIS but my browser
> always report the folowing error:
> msDrawMap(): Image handling error. Failed to draw layer named
> msPOSTGISLayerOpen(): Query error. couldnt make connection to DB with 
> connect string 'user=postgres password=***** dbname=db host=xxx.xxx 
> port=5432'.
> Error reported was 'could not create socket: Permission denied '.
> This error occured when trying to make a connection to the specified 
> postgresql server.
> Most commonly this is caused by
> (1) incorrect connection string
> (2) you didnt specify a 'user=...' in your connection string
> (3) the postmaster (postgresql server) isnt running
> (4) you are not allowing TCP/IP connection to the postmaster
> (5) your postmaster is not running on the correct port - if its not on

> 5432 you must specify a 'port=...'
> (6) the security on your system does not allow the webserver (usually 
> user 'nobody') to make socket connections to the postmaster
> (7) you forgot to specify a 'host=...' if the postmaster is on a 
> different machine
> (8) you made a typo
> Could someone help me. As simple as possible would be very glad.
> Sincerely...

Ezequias Rodrigues da Rocha
msn:ezequias at hotmail.com
"the worst of democracies is still better than the best of dictatorship"

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