Moxa V2616A-C8-CT-W7E [36/111] Attention
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Moxa V2616A-C8-CT-W7E [36/111] Attention

Moxa V2616A-C8-LX [36/111] Attention
V2616A Linux Managing Communications
3-14
# Here 2> /dev/null means the standard error messages will be dump to null device.
modprobe ip_tables 2> /dev/null
modprobe ip_nat_ftp 2> /dev/null
modprobe ip_nat_irc 2> /dev/null
modprobe ip_conntrack 2> /dev/null
modprobe ip_conntrack_ftp 2> /dev/null
modprobe ip_conntrack_irc 2> /dev/null
# Step 2. Define variables, enable routing and erase default rules.
PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin
export PATH
echo “1” > /proc/sys/net/ipv4/ip_forward
/sbin/iptables -F
/sbin/iptables -X
/sbin/iptables -Z
/sbin/iptables -F -t nat
/sbin/iptables -X -t nat
/sbin/iptables -Z -t nat
/sbin/iptables -P INPUT ACCEPT
/sbin/iptables -P OUTPUT ACCEPT
/sbin/iptables -P FORWARD ACCEPT
/sbin/iptables -t nat -P PREROUTING ACCEPT
/sbin/iptables -t nat -P POSTROUTING ACCEPT
/sbin/iptables -t nat -P OUTPUT ACCEPT
# Step 3. Enable IP masquerade.
#ehco 1 > /proc/sys/net/ipv4/ip_forward#modprobe ipt_MASQUERADE#iptables –t nat –
A POSTROUTING –o eth0 –j MASQUERADE
PPP (Point to Point Protocol)
PPP (Point to Point Protocol) is used to run IP (Internet Protocol) and other network protocols over a serial link.
PPP can be used for direct serial connections (using a null-modem cable) over a Telnet link, and links
established using a modem over a telephone line.
Modem/PPP access is almost identical to connecting directly to a network through the V2616A-LX Ethernet port.
Since PPP is a peer-to-peer system, the V2616A-LX can also use PPP to link two networks (or a local network
to the Internet) to create a Wide Area Network (WAN).
ATTENTION
Click on the following links for more information about PPP
:
http://tldp.org/HOWTO/PPP
-HOWTO/index.html
http://axion.physics.ubc.ca/ppp
-linux.html
Connecting to a PPP Server over a Simple Dial-up Connection
The following command is used to connect to a PPP server by modem. Use this command for old ppp servers
that prompt for a login name (replace “username” with the correct name) and password (replace “password”
with the correct password). Note that “debug crtscts” and “defaultroute 192.1.1.17” are optional.
#pppd connect ‘chat -v ““ ATDT5551212 CONNECT ““‘ ogin: username word: password’ /dev/
ttyMUE0 115200 debug crtscts modem defaultroute 192.1.1.17
If the PPP server does not prompt for the username and password, the command should be entered as follows
(replace “username” with the correct username and replace “password” with the correct password):

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