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What's the ADSL device to use to host a software firewall on a normal PC

I have an ADSL modem that I would like to replace with a computer that has a firewall on it (Pfsense) and I would like to know what kind of device to use on this PC in order to connect to the ISP. Would a USB Modem or faxmodem work? or there's something else that work.

My ADSL Modem is connected with a normal PSTN line.

I would appreciate any suggestion.

ASKER CERTIFIED SOLUTION

Benjamin MOREAU

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Otto_N

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Mohammed Hamada

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The problem is that the ADSL modem restarts and sometimes doesn't work! and I'm also planning on hosting my own mail, ftp, communication servers and do some tests so I would like to publish those services on a dynamic IP that I have from my ISP. Pfsense has dynamic DNS feature that supports NOIP (Free dynamic dns service) and in the mean time I can use the FQDN for supporting all these services and the firewall for publishing the service and also filtering traffic..

If I get another ADSL Modem and connected one of its LAN port to my Firewall PC's WAN port and disabled static NAT of the firewall would that do the trick?

Thanks

Otto_N

Yes, it should, although I'm not sure that you should disable the static NAT - The IP address on the LAN segment of the ADSL router would still be a Private address that must be NATed at some point to the PPPoA address the ADSL router gets assigned. You should, however, turn of the firewall on the ADSL router, or configure it to permit anything, if you cannot disable it.

However, since you have to look at new hardware - If you can get an ADSL Modem (that can connect via USB to your Firewall PC), the modem interface would become the WAN port of your firewall software.

Mohammed Hamada

ASKER

Is there any USB modem that matches the ADSL router capabilities? I donno what standards are both using or what's the exact similarities or differences between them both to be honest.

Also Is it not possible to NAT the ADSL Public IP to the (WAN) port IP of the Firewall directly without doing so to the internal (LAN) IP of the modem?

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Otto_N

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Predrag Jovic

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Mohammed Hamada

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Thanks everyone for your useful comments, I appreciate it