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Re: How to disconnect client from Server forcefully

From: Andrew Hammond <ahammond(at)ca(dot)afilias(dot)info>
To: bala srini <bala(dot)srini(at)rediffmail(dot)com>
Cc: pgsql-admin(at)postgresql(dot)org
Subject: Re: How to disconnect client from Server forcefully
Date: 2004-08-23 15:14:09
Message-ID: 412A09C1.4000906@ca.afilias.info (view raw or flat)
Thread:
Lists: pgsql-admin
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bala srini wrote:
| Hi All
|   Can anyone help me reg the below mail?
|
|   Assuming the environment is thru the terminal i.e by setting the
PGHOST varaible to server machine and then invoking the command "psql"
from client machine.
|
| Thanks & Regards
| Bala.
|
|
| On Fri, 20 Aug 2004 bala srini wrote :
|
|>Assuming that the enviroment of establishing the connection in client
may be anything.  I want to terminate these remote connections from
server side.
|>
|>I referred killing the process in server side. this porcess is
corresponding to the client connsction. After killing also, Client will
respawn the connection.
|>
|>

0) Use pg_who to identify the offending connection and it's source.
Assume it's connecting from host 192.168.0.23 as user "naughty" to
database "widgets".

1) Add a rule blocking access to your pg_hba ruleset:

host   widgets   naughty   192.168.0.23 255.255.255.255   reject

2) Tell the postmaster to re-read config files. This adds your new
pg_hba rule.

pgctl reload

3) Use pg_who (not part of default distro, but available on gborg IIRC)
and kill the offending process.

The offending process will now fill your log files with failed
re-connect notices.

- --
Andrew Hammond    416-673-4138    ahammond(at)ca(dot)afilias(dot)info
Database Administrator, Afilias Canada Corp.
CB83 2838 4B67 D40F D086 3568 81FC E7E5 27AF 4A9A
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