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Chapter 4. Your Internet Service Provider (ISP)
DNS: Publication of DNS Mail (MX) Records
The publication of DNS mail (MX) records is the method used to inform Domain Name Services worldwide that all e-mail to
your domain ("yourdomain.xxx") should be delivered to your e-mail server ("mail.yourdomain.xxx").
ETRN
ETRN is a command used for dialup solutions in order to retrieve e-mail temporarily stored at your ISP
Gateway IP Address
A gateway is the device on your network that forwards packets to and from the Internet. The gateway IP address is the IP
address for that device.
Internet News Service
If you want access to Internet newsgroups, your ISP will need to provide the IP address of an Internet news server. The ISP will
provide direction in configuring your web browser or other newsreading software.
PPP
PPP refers to the "Point-to-Point Protocol" used when a modem connects to the ISP.
PPPoE
"PPP over Ethernet" is a modified version of PPP that is used over some high-speed ADSL connections to the ISP.
Secondary Mail Server
A secondary mail server receives e-mail for your domain if your server is unavailable, and reattempts delivery later.
Subnet Mask (or netmask)
A subnet mask (or a netmask) has four numeric segments (each between 0 and 255) and looks like an IP address. It enables your
computers to deduce what network they are on. Your ISP provides the netmask for the external network between the ISP and
your server.
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