How to set custom DNS on CentOS7 AWS

30. August 2016 AWS, CentOS 0
How to set custom DNS on CentOS7 AWS
There may be scenarios, when you need to use a custom DNS server for your Instances. So if you are deploying your application on an CentOS 7 on AWS, lets see how can set a custom DNS server such as 8.8.8.8 and 8.8.4.4 Edit the following file, vim /etc/sysconfig/network-scripts/ifcfg-eth0 change the line PEERDNS="yes" to PEERDNS="no" Now, Edit the ...

EC2 Ubuntu – Allow SSH root login with Password

16. August 2016 AWS 0
EC2 Ubuntu – Allow SSH root login with Password
Amazon AWS doesn’t allow root access by default on the OS level. Even though this is for recommended for security purpose, you may need to enable it for some high level operations such as conversion to OVA or VMware etc. Environment Amazon EC2 Ubuntu 10.X (Should work with other linux versions too) How to Open ...

New – AWS Application Load Balancer

14. August 2016 AWS 0
New – AWS Application Load Balancer
AWS has launched a new Application Load Balancer option on ELB. This option runs at Layer 7 and supports a number of advanced features. The original option is now knon as Classic Load Balancer, is still available to you and continues to offer Layer 4 and Layer 7 functionality. Highlights Layer 7 Load Balancing, ie you ...

Liferay with S3 – The action Create Object in bucket cannot be performed with an invalid bucket: null

15. June 2016 AWS 0
Liferay with S3 – The action Create Object in bucket cannot be performed with an invalid bucket: null
Issue You are trying to integrate AWS S3 bucket with your Liferay Application. You have a dedicated IAM user, Access Key, Secret Key for the bucket. You are getting the below error. “ERROR: ” com.liferay.portal.kernel.exception.SystemException: org.jets3t.service.S3ServiceException: The action Create Object in bucket cannot be performed with an invalid bucket: null”” Resolution Makesure the below policy ...

fatal: parameter inet_interfaces: no local interface found for ::1

11. June 2016 RHEL 2
fatal: parameter inet_interfaces: no local interface found for ::1
Issue You are note able to restart / start postfix and getting the below error. fatal: parameter inet_interfaces: no local interface found for ::1 Solution Edit the file /etc/postfix/main.cf vim /etc/postfix/main.cf search for the line inet_interfaces = all And change it to: inet_interfaces = 127.0.0.1, 10.10.11.12 10.10.11.12 is your local IP address :wq! Save and ...

DROWN – Cross-protocol attack on TLS using SSLv2

DROWN – Cross-protocol attack on TLS using SSLv2
Its the time for another openssl update, Update your openssl and openssl-libs packages with below commands. RHEL / CentOS / OEL (rpm based) yum update openssl Ubuntu / Debian Based (apt based) apt-get update openssl Check your installation at https://drownattack.com For more details : https://access.redhat.com/security/vulnerabilities/drown Jobin Josephhttps://nixhive.com/