Re: Remote acces problem

The firewall allows traffic on the all ports for the ip of the computer which should connect.

The remote computer user reported that the connection reports error with TNSPING. Best regards

Radim Friedel

"Svend Jensen" <svend.jensen_at_it.dk> píse v diskusním príspevku news:3E51317B.3070306_at_it.dk...
> Your problem lies in the firewall. That allows traffic on port 1521
> only, right?
>
> But standard the initial port 1521 is only for initiating the session
> traffic. As soon a connection is granted (user, password, instance, SID,
> db_name, db_domain and whatever....), the listener creates a shadow
> process and redirects the client to this process on any random port in
> the range above 1024 but below 65535. And there your firewall is
> blocking. Client probably get ora-03114 or silence.
>
> To overcome this port switching set environment parameter
> USE_SHARED_SOCKETS = TRUE (se Metalink, search the word)
> Don't trust the entries in the listener.log in this case; they tell you
> that the connection is spawned on 2628 or the like. But in real world
> the connection to the thread (shadow process) is made on port 1521, and
> the firewall is not blocking anymore.
>
> regards
> /Svend Jensen
>
> Radim Friedel wrote:
> > Hello
> >
> > NT 4 server,Oracle 8
> >
> > 1 physical NIC and 2 IP on it
> >
> > internet->firewall->public ip//NT 4\\local ip<-local user
> >
> > Local users can use oracle DB without any problem
> > Remote user do see the listener, but they can»t connect to the DB.
> >
> > I don´t know how to configure listener.
> >
> > Should I specify both IPs in listener.ora like this?
> >
> > LISTENER =
> > (DESCRIPTION_LIST =
> > (DESCRIPTION =
> > (ADDRESS_LIST =
> > (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.1)(PORT = 1521))
> > (ADDRESS = (PROTOCOL = TCP)(HOST = 212.80.76.3)(PORT = 1521))
> > (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
> > )
> > )
> > )
> >
> > Could be both IP´s on the same port?
> >
> > How to modify the tnsnames.ora? I do use two SID´s.
> >
> > TEST =
> > (DESCRIPTION =
> > (ADDRESS_LIST =
> > (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.1)(PORT = 1521))
> > )
> > (CONNECT_DATA =
> > (SERVICE_NAME = TEST)
> > )
> > )
> >
> > TEST2 =
> > (DESCRIPTION =
> > (ADDRESS_LIST =
> > (ADDRESS = (PROTOCOL = TCP)(HOST = 212.80.76.3)(PORT = 1521))
> > )
> > (CONNECT_DATA =
> > (SERVICE_NAME = TEST)
> > )
> > )
> >
> > I´m new to the oracle.
> > Somwhere I saw info that I need to use Connection manager which I don´t
have
> > configured yet.
> >
> > Thank you forward for any information about this problem.
> >
> > Best regards
> >
> > Radim
> >
> >
>
Received on Tue Feb 18 2003 - 02:14:34 CST