Networking
Basic networking concepts and related firewall rules
Network Interface Cards (NICs)
ifconfig can be used to list all available Network Interface Cards (NICs).
Understanding Network Interface Naming convention in CentOS
In Centos7 new predictable network interface name conventions have been introduced. For example, the naming convention used to identify an ethernet card are: type, bus, and slot:
enp3sp indicate an Ethernet device, bus 3, slot 0.
The types of network interfaces are:
| NIC name | Description |
|---|---|
en | ethernet |
sl | Serial line IP (slip) |
wl | wlan |
ww | swa |
lo | Loopback interface |
Deprecated naming conventions
| NIC name | Description |
|---|---|
eth0, eth1 | Internet-connected interface |
wlan0, wlan1 | wlan |
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