How to make changes in assigning security groups for an existing security groups in EC2

From the EC2 instance launching page --> right click on the instance --> Networking -->Change Security Groups.

Assign or un assign security groups by checkbox &Click on Assign Security Groups.                                        

Security Groups

security groups are like virtual firewalls which allows communications from different through desired port numbers.

Few thumb rules in security groups:

1.By default all inbound traffic is blocked.

2.All outbound traffic is allowed based on inbound.

3.You can specify allow rules(0.0.0.0/0),but not deny rules(deny for particular ip address 😊)

4.you cannot block specific ip address using security groups, instead use network access control list.

Practical steps:

1.      1. Login to AWS account.    

 N   2.Navigate to Services àunder compute section àEC2àrunning instance --> security groups(as highlighted below.

3.Resultant screen looks like below screen. Here we can create, delete & edit security groups.                 

4.in the inbound tab, can open new ports or close existing old ports.                                                   

5.Add,delete,edit the port values, can be done here.                                                                      

6.Once after saving need to assign the security group to required EC2 instance.

Security: improve your user Master Record Accuracy with Hidden Fields

By default,some user master record fields in Transaction SU01 are not displayed.for better accuracy enter custom data to better classify your master data.

This post especially useful for the SAP customers, who do not have SAP ERP HCM (Human Capital Management).

Note: By following the below steps,Maintaining the perner number,company code, department,personnel area etc. is also possible. You can gather all the information by tables USR02,USR21,ADCP,ADR6 ,V_USERNAME and USER_ADDR.



Here's How

Step 1: Login to respective system.

step 2: Execute T-code: SU01

step 3: click on Edit button.
           Here i'm using DDIC user, use your user name as per your requirement.

             

step 4: Default screen obtain with the above step.                                                                                                                                                                                                                               

Step5: click on the button as shown below.

step 6:Then the hidden fields are displayed. maintain the hidden fields and SAVE. for the better accuracy of user Master data.