vadny CDMA modem nebo problem v Iptables?

[sniper_2 na centrum.cz]

Zdravim v novem roce a vsem preji hodne pohodicky.

Tak jsem porad problem ohledne pridelovani ruznych IPadres na modemu CDMA 
GTRAN nevyresil. Prolezal jsem konference na www.cdma.cz, googloval atd. 
nasel jsem prispevky ktery bud nejsou funkcni vubec nebo jsou priliz 
zastarale.  Myslim ze modem na reklamaci neni, nebot jsem pomoci TCPDUMP 
zjistil ze modem spadne po prichozim packetu s jinou zdrojovou IP(jak zde 
bylo receno drive).

Muzete mi nekdo poradit co mam v ip-up blbe:?




=========================== ip-up ======================
#!/bin/bash

# this is a script which is executed after connecting the ppp interface.
# look at man pppd for details

# the followings parameters are available:
# $1 = interface-name
# $2 = tty-device
# $3 = speed
# $4 = local-IP-address
# $5 = remote-IP-address
# $6 = ipparam

#Support for the new Gentoo baselayout
[ -f /sbin/functions.sh ] && source /sbin/functions.sh
if [ -x "${svclib}/net.modules.d/helpers.d/pppd-wrapper" ] &&
   [ -x "/etc/init.d/net.$1" ] ; then

        ${svclib}/net.modules.d/helpers.d/pppd-wrapper up $1

elif [ "$USEPEERDNS" ]; then

        # add the server supplied DNS entries to /etc/resolv.conf
        # (taken from debian's 0000usepeerdns)

        # follow any symlink to find the real file
        REALRESOLVCONF=$(readlink --canonicalize /etc/resolv.conf)

        if [ "$REALRESOLVCONF" != "/etc/ppp/resolv.conf" ]; then

                # merge the new nameservers with the other options from the 
old configuration
                {
                        grep --invert-match '^nameserver[[:space:]]' 
$REALRESOLVCONF
                        cat /etc/ppp/resolv.conf
                } > $REALRESOLVCONF.tmp

                # backup the old configuration and install the new one
                cp -dpP $REALRESOLVCONF $REALRESOLVCONF.pppd-backup
                mv $REALRESOLVCONF.tmp $REALRESOLVCONF

                # correct permissions
                chmod 0644 /etc/resolv.conf
                chown root:root /etc/resolv.conf

        fi

fi

[ -f /etc/ppp/ip-up.local ] && . /etc/ppp/ip-up.local "$@"

echo "0" > /proc/sys/net/ipv4/ip_forward
/sbin/iptables -F
/sbin/iptables -X
/sbin/iptables -t nat -F
/sbin/iptables -t nat -X
PPP_IIP="$4"
/sbin/iptables -A OUTPUT -m state --state INVALID -o ppp0 -j DROP
/sbin/iptables -t nat -A OUTPUT -m state --state INVALID -o ppp0 -j DROP
/sbin/iptables -A OUTPUT --source ! ${PPP_IIP} -o ppp0 -j DROP
/sbin/iptables -t nat -A OUTPUT --source ! ${PPP_IIP} -o ppp0 -j DROP
/sbin/iptables -t nat -A POSTROUTING -o ppp0 -s 192.168.1.0/24 -j MASQUERADE
/sbin/iptables -t nat -A POSTROUTING -o ppp0 -s 192.168.2.0/24 -j MASQUERADE
echo "1" > /proc/sys/net/ipv4/ip_forward












======================= ip-down =====================
#!/bin/bash

# this is a script which is executed after disconnecting the ppp interface.
# look at man pppd for details

# the followings parameters are available:
# $1 = interface-name
# $2 = tty-device
# $3 = speed
# $4 = local-IP-address
# $5 = remote-IP-address
# $6 = ipparam

#Support for the new Gentoo baselayout
[ -f /sbin/functions.sh ] && source /sbin/functions.sh
if [ -x "${svclib}/net.modules.d/helpers.d/pppd-wrapper" ] &&
   [ -x "/etc/init.d/net.$1" ] ; then

        ${svclib}/net.modules.d/helpers.d/pppd-wrapper down $1

elif [ "$USEPEERDNS" ]; then

        # taken from debian's 0000usepeerdns
        # follow any symlink to find the real file
        REALRESOLVCONF=$(readlink --canonicalize /etc/resolv.conf)

        if [ "$REALRESOLVCONF" != "/etc/ppp/resolv.conf" ]; then

                # if an old resolv.conf file exists, restore it
                if [ -e $REALRESOLVCONF.pppd-backup ]; then
                        mv $REALRESOLVCONF.pppd-backup $REALRESOLVCONF
                fi

        fi

fi

[ -f /etc/ppp/ip-down.local ] && . /etc/ppp/ip-down.local "$@"

echo "0" > /proc/sys/net/ipv4/ip_forward
route del default
/sbin/iptables -t nat -F
/sbin/iptables -t nat -X
/sbin/iptables -F
/sbin/iptables -X