Then, as need is demonstrated, you systematically provide the smallest opening required while having a good understanding of the risks added with each opening. First, a Strategy Some of the firewalls listed in the accompanying charts provide pleasant graphical interfaces that attempt to make this task as painless as possible. On the contrary, allowing access to your network with out compromising its integrity requires a thorough understanding of network protocols, Internet applications and host operating systems. The more hosts you have, the more difficult this becomes, and the more reliant you may be on your firewall. A larger organization could have a team of individuals who understand the issues involved.
Many companies even have positions dedicated solely to networ k security.
If you don't have the resources in your organization to effectively grapple with this issue, then you need to find another way to cover all the bases. For instance, you may hire a consultant to provide these services. In some cases, a value-added reseller that markets firewalls will be able to provide assistance. But there are no guarantees that the outsourcer is qualified to do the job. You will want to check references carefully before you entrust the security of your network to a third party.