Firewall confusion please help

Hi Everyone,

We want firewall cum router both featured device to put in gateway. we are thinking to buy cyberoam box or fortinet box with subscription. Our ISP gave us leased line of 6 Mbps leaving with RJ45 connector. We have public IP and gateway also , checked with little wireless home router. it's working fine. Now, need firewall+router.
In my office 120 users. Max can be reached 140 users not more than this ever.
My questions is :-
 I have capability to install  and manage pfsense,smooth wall and ipcop firewalls on computer.
If I will make pfsene firewall which is freeware as it is linux based by putting two LAN cards on one pc and also will work as router gateway.
Can that PC firewall bear the network traffic load of all 120-140 users at gateway ?
OR Else better to buy Cybroam box as we are thinking.?

PC configuration would be 16 gb ram and xeon 3.5 gigs processor.

In future user will not increase but we can use video conferencing in one room only by increasing bandwidth to 12 Mbps.

If someone has experienced of free Linux based firewall and can bear the network traffic load and work smoothly. then it will save our money.
Is it right choice?
Waiting for answers.
LVL 10
Ashok DewanFreelancerAsked:
Who is Participating?
Most hardware firewalls are nothing more than a PC.  Some are a harden copies of Linux or BSD with custom built user interface, some are custom built "OS's".  So a PC could easily handle it.

However, if you are here asking a question like this, I would really question if you have the knowledge/ability to install Linux, all the software required, manage  it, and keep everything patched and up to-date.  Then you have the issue of support.  No offense.

I agree with John Hurst's suggestion that you get a hardware firewall.   Much easier to maintain, and you get support.
JohnBusiness Consultant (Owner)Commented:
I use hardware firewalls and the result is good, easier to attain and cost effective over 2 or 3 years. Juniper Netscreen routers can be sized to 200 users with no problem. Once installed, there is little to manage. Business judgment says to purchase capital in order to save labour.
Ashok DewanFreelancerAuthor Commented:
Thanks giltjr  and john hurst.
Yes, I had done installation and little managment of pfsense, ipcop in 2012.
Now, I have decided to go for pfsense on above pc configuration. Just installed all pfsense and all required packages.
Hope every thing would be fine.
JohnBusiness Consultant (Owner)Commented:
@Ashok Dewan  - Thanks for the update and I was happy to help.
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