Wan C Onfiguration - Netgate FW-7541 Quick Start Manual

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WAN C onfiguration
This p age i s w here y our I nternet c onnection i s c onfigured. Y ou w ill n eed
information f rom y our I SP t o c onfigure t his s creen a ppropriately. A f ew n otes t o
assist y ou:
MAC a ddress – i f r eplacing a n e xisting f irewall, y ou m ay w ant t o e nter t he o ld
firewall's W AN M AC a ddress h ere, i f y ou c an e asily t ell w hat t hat i s. T his c ommonly
avoids i ssues i nvolved i n s witching o ut f irewalls, s uch a s A RP c aches, I SPs l ocking t o
single M AC a ddresses, e tc.
If y ou c an't e nter t he M AC o f y our c urrent f irewall h ere, i t p robably i sn't a b ig d eal –
power c ycle y our r outer o r m odem a nd y our n ew M AC w ill u sually b e a ble t o g et
online. F or s ome I SPs, y ou h ave t o c all w hen s witching d evices, o r g o t hrough a n
activation p rocess o f s ome s ort.
Static I P c onfigurations – t he s ubnet m ask i s c onfigured i n C IDR f ormat, w hich i s
usually p rovided b y t he I SP i n a ddition t o t he 2 55.x.x.x s ubnet m ask. T he f ollowing
table s hows t he m ost c ommon s ubnet m asks a nd t heir C IDR e quivalent.
Block p rivate n etworks a nd b ogons – t hese t wo o ptions w ill b lock p rivate,
unassigned, a nd r eserved I P s ubnets f or t raffic i nitiated o n y our W AN c onnection
(i.e. c oming i n f rom t he I nternet). T hese I P r anges s hould n ever b e s een o n t he
Internet, a nd t hese s hould b oth b e e nabled o n s ystems t hat a re d irectly c onnected t o
the I nternet. I f y our W AN r esides o n a p rivate n etwork, y ou m ay n ot w ant t o u se
these o ptions.
Subnet M ask
255.255.255.252 30
255.255.255.248 29
255.255.255.240 28
255.255.255.224 27
255.255.255.192 26
255.255.255.128 25
255.255.255.0
255.255.254.0
CIDR
24
23