Question on achieving ultimate network security

5 pts.
Linux applications
MySQL Database
Network security

I would be grateful if you could advise me on a security issue I have on my network security. I have a web application on linux with my data stored on a mysql database on the same server (actually it is a sugarcrm)

The sugarcrm which contains information about my clients is used by my departments for their routine jobs such as creating email marketing campaigns or emails to clients.

As security measure for this system, the main server and departments are isolated from internet. Only specific people have access to internet for sending emails and email marketing campaigns.

The people who have access to internet also have access to sugarcrm, through an intermediary application;i.e.,  Softtalk shared server  that is on the internal network ,accessible to internal users and internet users.

The internet users have a firewall securing them from the internet.

So the only points of internet connection for my system are internet users who do the task of sending emails and email campaigns.

My goal is to make sure that there will be no successful intrusion into my system and that my clients’ data are well secured and protected. Therefore I would greatly appreciate if you could make me any assistance and guidance on my system. Its security holes that have to be removed and any other method for enhancing security to the level of a no-hole system.

looking forward to hear from you  

Software/Hardware used:
software firewalls and routers ( on linux)- sugarcrm

Answer Wiki

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If the Softtalk shared server is accesible from the internet, that would be one point that needs to be properly secured. How do external users access it ? How is it connected to the internet ? how does it connect to your sugarcrm server ?

One general security measure is to have all operating systems patched to the latest patch level available, and this includes client and server machines. Also, disabling all services that not in use, and changing all default configuration/passwords is something that needs to be done, mainly on machines that are accesible from the internet.

If the sugarcrm server is only accessed from the internal network you could use the iptables firewall to only accept packets from the internal network and only to the ports your CRM application and any other application running on the server use to service client requests.

On your users’ machines a good anti malware program should be installed too, in addition to a firewall.


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