Protect your servers against brute force SSH attacks

February 8, 2013  |  linux, security  |  1 Comment

I bet if any of you have an exposed server to an internet connection, without properly firewall protection, that your server is under heavy fire from hackers around the "world"... By the world I mean mostly China and Russia ssh attacks. If you're curious, on Linux you can check the...

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Installing NGINX on RHEL 5/6 (Centos and Oracle Linux too)

May 14, 2012  |  cloud, linux, security  |  No Comments

I'm an huge NGINX fan. Nginx pronounced “Engine-X” is an open source Web server and a reverse proxy server for HTTP, SMTP, POP3 and IMAP protocols, with a strong focus on high concurrency, performance and low memory usage. Nginx is awesome... really. I use it since 0.6 beta and never had...

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Oracle supported features on Amazon RDS

July 1, 2011  |  cloud, dba, security  |  3 Comments

What are the differences between Oracle Relational Database Service (Amazon RDS) and Oracle Database software? This question is heard very often from people that want to go for a trial on Oracle for Amazon RDS. For instance, most of them ask if Enterprise Manager is available on Oracle RDS. And...

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Change Oracle Flash Recovery Area location

November 3, 2010  |  dba, security  |  1 Comment

Oracle's default Flash Recovery Area (FRA) location default location is at ORACLE_BASE/flash_recovery_area. Most of the times you want to take it from the default storage where you install oracle software to another storage device. That's what' we'll see today. But first... Flash Recovery Area feature allows you to set up a...

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Reverse proxy APEX with Nginx

October 22, 2010  |  apex, linux, security  |  13 Comments

Today i'll describe how easy is to use Nginx as a reverse proxy for APEX applications, providing a layer of security by not exposing the APEX database server. Nginx (pronounced “engine X”) is a lightweight, high-performance Web server/reverse proxy and e-mail (IMAP/POP3) proxy, licensed under a BSD-like license. It is stable, secure...

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Database Link 10g 11g Fails ORA-01017

September 9, 2010  |  dba, security  |  13 Comments

When I was testing a database link between a 10g database and an 11g databaase, i got ORA-01017: invalid username/password; logon denied followed by ORA-02063: preceding line from dblink11g. A database link is a schema object in one database that enables you to access objects on another database. The other database...

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