Fing Fingbox, Руководство пользователя

Страница: 43 / 58

BitTorrent. ​ ​ Unfortunately, ​ ​ many ​ ​ devices ​ ​ and ​ ​ applications ​ ​ have ​ ​ software ​ ​ defects ​ ​ that, ​ ​ when
exposed ​ ​ to ​ ​ the ​ ​ Internet, ​ ​ may ​ ​ put ​ ​ your ​ ​ network ​ ​ at ​ ​ risk ​ ​ of ​ ​ unauthorized ​ ​ access. ​ ​ We ​ ​ strongly
recommend ​ ​ that ​ ​ you ​ ​ regularly ​ ​ update ​ ​ the ​ ​ software ​ ​ of ​ ​ all ​ ​ the ​ ​ devices ​ ​ and ​ ​ applications ​ ​ you ​ ​ want
to ​ ​ expose. ​ ​ Fingbox ​ ​ Security ​ ​ Check ​ ​ helps ​ ​ to ​ ​ be ​ ​ aware ​ ​ of ​ ​ what ​ ​ gets ​ ​ exposed ​ ​ to ​ ​ the ​ ​ Internet.
If ​ ​ you’re ​ ​ not ​ ​ familiar ​ ​ with ​ ​ concepts ​ ​ like ​ ​ IP ​ ​ routing ​ ​ and ​ ​ port ​ ​ forwarding, ​ ​ you ​ ​ can ​ ​ read ​ ​ the ​ ​ following
section ​ ​ “Meet ​ ​ the ​ ​ router”.
Meet ​ ​ the ​ ​ router
Your ​ ​ home ​ ​ network ​ ​ is ​ ​ connected ​ ​ to ​ ​ the ​ ​ Internet ​ ​ through ​ ​ a ​ ​ special ​ ​ device ​ ​ called ​ ​​ router
​
. ​ ​ It ​ ​ acts
as ​ ​ the ​ ​​ default ​ ​ gateway ​ ​ ​ used ​ ​ by ​ ​ all ​ ​ the ​ ​ other ​ ​ devices ​ ​ and ​ ​ software ​ ​ applications ​ ​ to ​ ​ reach
services ​ ​ and ​ ​ computers ​ ​ over ​ ​ the ​ ​ Internet. ​ ​ Your ​ ​ router ​ ​ has ​ ​ usually ​ ​ two ​ ​ “sides”, ​ ​ technically ​ ​ called
interfaces: ​ ​ an ​ ​​ internal ​ ​ interface ​​ ​ (typically ​ ​ labeled ​ ​ LAN) ​ ​ facing ​ ​ your ​ ​ home ​ ​ network ​ ​ and ​ ​ an
external ​ ​ interface ​​ ​ (sometimes ​ ​ labeled ​ ​ WAN ​ ​ or ​ ​ Internet), ​ ​ connecting ​ ​ to ​ ​ your ​ ​ Internet ​ ​ service
provider ​ ​ (directly ​ ​ to ​ ​ cable, ​ ​ DSL, ​ ​ fiber ​ ​ or ​ ​ wireless ​ ​ or ​ ​ indirectly ​ ​ via ​ ​ a ​ ​ modem ​ ​ device). ​ ​ Your ​ ​ router
is ​ ​ the ​ ​ bridge ​ ​ between ​ ​ the ​ ​ global ​ ​ internet ​ ​ and ​ ​ your ​ ​ home.
The ​ ​ external ​ ​ interface ​ ​ will ​ ​ be ​ ​ assigned ​ ​ by ​ ​ your ​ ​ provider ​ ​ a ​ ​​ Public ​ ​ IP ​ ​ address. ​ ​​ This ​ ​ is ​ ​ the
equivalent ​ ​ of ​ ​ your ​ ​ home ​ ​ address ​ ​ in ​ ​ the ​ ​ global ​ ​ internet, ​ ​ used ​ ​ to ​ ​ deliver ​ ​ data ​ ​ to ​ ​ your ​ ​ devices.
Your ​ ​ devices ​ ​ on ​ ​ the ​ ​ other ​ ​ hand ​ ​ will ​ ​ be ​ ​ assigned ​​ ​ Internal ​ ​ IP ​ ​ Addresses ​​ ​ not ​ ​ visible ​ ​ from ​ ​ the
outside ​ ​ world. ​ ​ The ​ ​ size ​ ​ of ​ ​ your ​ ​ internal ​ ​ network ​ ​ (ie. ​ ​ how ​ ​ many ​ ​ internal ​ ​ devices ​ ​ can ​ ​ be
addressed) ​ ​ is ​ ​ called ​ ​ a ​ ​​ Subnet ​ . ​ ​ A ​ ​ typical ​ ​ subnet ​ ​ is ​ ​ 255.255.255.0 ​ ​ and ​ ​ it ​ ​ can ​ ​ include ​ ​ up ​ ​ to ​ ​ 254
devices. ​ ​ Internal ​ ​ IP ​ ​ addresses ​ ​ can ​ ​ be ​ ​ assigned ​ ​ manually ​ ​ or ​ ​ by ​ ​ a ​ ​ service ​ ​ called ​ ​​ DHCP ​ ​ Server
which ​ ​ often ​ ​ runs ​ ​ on ​ ​ the ​ ​ router ​ ​ itself.
The ​ ​ router ​ ​ acts ​ ​ as ​ ​ a ​ ​ forwarder ​ ​ of ​ ​ data ​ ​ between ​ ​ your ​ ​ devices ​ ​ on ​ ​ the ​ ​ internal ​ ​ interface ​ ​ and ​ ​ the
global ​ ​ internet ​ ​ on ​ ​ the ​ ​ external ​ ​ interface ​ ​ via ​ ​ a ​ ​ process ​ ​ called ​ ​​ NAT ​ ​​ (Network ​ ​ Address
Translation).
Router ​ ​ with ​ ​ integrated ​ ​ WiFi
If ​ ​ your ​ ​ router ​ ​ also ​ ​ acts ​ ​ as ​ ​ the ​ ​​ WiFi ​ ​ access ​ ​ point ​ , ​ ​ the ​ ​ WiFi ​ ​ network ​ ​ is ​ ​ typically ​ ​ attached ​ ​ to ​ ​ the
internal ​ ​ interface ​ ​ and ​ ​ all ​ ​ the ​ ​ wireless ​ ​ devices ​ ​ will ​ ​ usually ​ ​ be ​ ​ in ​ ​ the ​ ​ same ​ ​ subnet ​ ​ as ​ ​ the ​ ​ ones
wired
​
​ ​ to ​ ​ the ​ ​ ethernet ​ ​ ports ​ ​ of ​ ​ the ​ ​ router.
Guest ​ ​ WiFi
In ​ ​ case ​ ​ your ​ ​ router ​ ​ offers ​ ​ the ​ ​ (wise) ​ ​ option ​ ​ of ​ ​ creating ​ ​ a ​ ​​ “guest” ​ ​ network ​ , ​ ​ it’s ​ ​ important ​ ​ to ​ ​ note
that ​ ​ it ​ ​ is ​ ​ completely ​ ​ separate ​ ​ from ​ ​ your ​ ​ home ​ ​ network. ​ ​ Technically, ​ ​ the ​ ​ guest ​ ​ network ​ ​ is ​ ​ a
dedicated ​ ​ subnet, ​ ​ with ​ ​ its ​ ​ own ​ ​ dedicated ​ ​ “internal” ​ ​ router ​ ​ interface ​ ​ and ​ ​ network ​ ​ address
numbers. ​ ​ Typically ​ ​ a ​ ​ guest ​ ​ device ​ ​ cannot ​ ​ access ​ ​ devices ​ ​ on ​ ​ your ​ ​ home ​ ​ network ​ ​ (and ​ ​ this ​ ​ is ​ ​ a
Fingbox User’s ​ ​ Guide ​ ​ - ​ ​ App ​ ​ v6.2.1 Page ​ ​ 43