Sharp SL-5500 File Manager Guide Uživatelský manuál stáhnout pdf (Strana 40)

CHAPTER 11. USE 11.3. GLOBAL NETWORKING

ifconfig

• Bring interface interfacename up:

ifconfig interfacename up

ifup interfacename

• Bring interface interfacename down:

ifconfig interfacename down

ifdown interfacename

11.3.2 With USB

However, many people with conventional PDA devices will connect using USB to the desktop or

laptop computer. In this scenario, your host computer will serve as a router for your

Angstr

device, and so must be conﬁgured accordingly: you must enable IP forwarding and NAT on it.

Please consult your Linux distribution manual on how to make such changes permanent, to be

able to connect the device to the Internet without manual setup in the future. We here assume that

you are using a Linux server. If you are using a Windows one, you need to enable

ICS

(Internet

Connection Sharing) to achieve the similar functionality. If you are already using

ICS

for a different

interface than the one you projected to work with, consider the use of a simple proxy such as

AnalogX’s

, for giving other cards access to the Internet. It is due to the fact that

ICS

can only deal

with a couple (of two) devices.

11.3.2.1 On the Server

To activate NAT, you could do

iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

assuming eth0 is your external interface.

To activate IP forwarding, you then edit /etc/sysctl.conf, adding

net.ipv4.ip_forward = 1

to it, or replacing

net.ipv4.ip_forward = 0

net.ipv4.ip_forward = 1

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Sharp SL-5500 File Manager Guide Uživatelský manuál Strana 40