ADSL, routers firewalls etc.
(Apologies if this is already sent)
I manage a small office network that we can now afford to upgrade to an ADSL
internet connection. In researching ADSL support for Debian linux I am a
little confused on a few issues, mainly as I only have experience with Cable
Modem broadband, not DSL.
I have already purchased a Hub for the network which consists of a Debian
MySql and Apache server, another Debian firewall box and some Win boxes.
My confusion lies in both terminology and setup. I imagined before starting
that I would need to set up a firewall machine with 2 network devices. The
firewall would then manage security and masquerading, where the external eth
device will be allocated the static IP (Non-NAT) I have been given by my
However research of the most common Ethernet DSL modems (cheapest about $100
/ £ 66) suggests that
1) the modem has NAT, firewall etc all built in.
2) many manufacturers combine a network hub and modem.
3) the modem itself must be assigned an IP not the machine it is fixed to????
I'm assuming therefore that the firewall machine is not required. I had
previously thought that a gateway machine such as a firewall was necessary
for me to be able to SSH to do remote admin.
Also I have already purchased a hub and the firewall machine (old box
knocking around) therefore I was hoping to just get a modem. I do not have
Any comments welcome, and thanks in advance for reading this far!
Was thinking of buying Conexant AMX-CA61E (1 Port)
Protocol: PPP/VC (sometimes called: PPPoA or PPP over ATM) VPI=0 VCI=38
Encapsulation method: VCMUX
Modulation method: G.DMT