Тогда выкладывайте настройки сети.
/etc/network/interface
auto eth0
iface eth0 inet static
address 192.168.192.204
netmask 255.255.0.0
network 192.168.0.0
broadcast 192.168.255.255
gateway 192.168.1.254
# dns-* options are implemented by the resolvconf package, if installed
dns-nameservers 192.168.1.100
up /sbin/route add 192.168.1.100 dev eth0
up /sbin/route add 192.168.1.254 dev eth0
up /sbin/route add -net 10.168.0.0/16 gw 192.168.1.254 dev eth0
up /sbin/route add -net 10.216.138.0/24 dev eth1
up /sbin/route add -net 10.200.128.0/24 dev wlan0
pre-up /sbin/iptables-restore < /etc/iptables.rules
auto eth1
iface eth1 inet static
address 10.216.138.1
netmask 255.255.255.128
network 10.216.138.0
broadcast 10.216.138.127
auto ppp0
iface ppp0 inet ppp
provider kvartal