The Firewall Is A Pretty Basic Configuration But Makes Your Network Secure

1025 Words Jan 12th, 2016 null Page
The firewall is a pretty basic configuration but makes your network secure. To configure the firewall to work securely we must first identify our VLANs then the corresponding interface with the command ‘nameif’ we then can choose whether that VLAN we be responsible for the inside, outside or DMZ on the network. When doing this the firewall can identify and set a default security level for inside it would be 100 for outside it would be 0. Alternately we can choose the security level we want. For a DMZ like we are using in our network we can set a security level between 50-70. I’ve chosen security level 70 for my DMZ as I feel it is a higher level therefore adding much more security. Something to note is that the license we use depends whether we can actually use a DMZ. Some other settings to take note of that have been mentioned previous in my security seminar is encryption and by default all password on the firewall are encrypted with AES also by default things like SSH are used by default and the timers for that and keys are all set and checked. See Appendix IV & IX.
Some other basic security implementation that help secure the network is the packet inspects we can set as many as we like on the network but by default a lot of them are already in place. One that I added in is inspect ICMP this will inspect all ICMP packets sent through the firewall both the inside and outside network. We do this by add a policy map and giving the statement ‘inspect ICMP’ we can have multiple…

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