ORA-03135:connection lost contact

Posted on 2006-05-30
Last Modified: 2011-08-18

Hello there,

i am trying to connect to a remote oracle 10g db.but i get a ORA-03135 error.there is no firewall on that server.other computer on the netwrok can connect to the db.i also have a oracle 10g db on my local computer to which i can connect without problem.then why can't i connect to the remote computer.

Question by:zolf
    LVL 3

    Expert Comment

    if you are using windows 20003 there is a software firewall on server machine you can disable it in control panel

    Author Comment


    can you please tell me in more details what do you mean.i did not quite understand
    LVL 7

    Accepted Solution

    You may need to verify your TNSNames file has the correct connection information on the machine that will not connect (Assuming you are using TNSNames). If that is not the problem, try using a different tool to connect with and see if you have the same problem.

    For example, if you have been attemting to connect with TOAD or SQL Worksheet, try connecting with SQL Plus and see if you get the same error. If all of your tools give the same error, it is likely a configuration problem on your machine (for example, incorrect TNS entry), but if SQL Plus will connect, you probably have bad connection information in an individual tool.

    LVL 3

    Expert Comment

    In controlpanel windows firewall is there please disable that

    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    PRTG Network Monitor: Intuitive Network Monitoring

    Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

    Subquery in Oracle: Sub queries are one of advance queries in oracle. Types of advance queries: •      Sub Queries •      Hierarchical Queries •      Set Operators Sub queries are know as the query called from another query or another subquery. It can …
    Have you ever had to make fundamental changes to a table in Oracle, but haven't been able to get any downtime?  I'm talking things like: * Dropping columns * Shrinking allocated space * Removing chained blocks and restoring the PCTFREE * Re-or…
    Via a live example show how to connect to RMAN, make basic configuration settings changes and then take a backup of a demo database
    This video shows how to Export data from an Oracle database using the Datapump Export Utility.  The corresponding Datapump Import utility is also discussed and demonstrated.

    794 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    16 Experts available now in Live!

    Get 1:1 Help Now