/sbin/ifconfig eth0:1 192.168.12.5 netmask
eth0:1 je alias...

/sbin/ifconfig eth0:1 172.27.172.27 netmask 255.255.255.0 broadcast 172.27.172.255

route add -net 192.168.21.0 netmask 255.255.255.0 dev eth0
ip route add 192.168.21.0/24 dev eth0

route add default gw 192.168.3.1
ip route add default via 192.168.3.1
route add -net 192.168.19.0 netmask 255.255.255.0 gw 192.168.3.11
ip route add 192.168.19.0/24 via 192.168.3.11

ROUTOVANI viz lubosovy materialy


/sbin/route -n
routovaci tabulka


iptables -A INPUT -i lo -j ACCEPT
iptables -A INPUT - p tcp --dport 22 -j ACCEPT

iptables -P INPUT DROP   nebo  iptables -P INPUT REJECT
iptables -R INPUT -j DROP

iptables -f FORWARD

iptables -A FORWARD -s 192.168.13.18/23 -j ACCEPT
iptables -A FORWARD -d 192.168.13.18/23 -j ACCEPT


ssh - g -L portJA:localhost:portCIL adresa

ssh -L 12345:192.168.12.24:3306 viktor@router.firma.cz

pust si ssh server na portu 80/443
tunely na lokalnim otevrenym portem, tam vyplnim ten cil

ssh 
////ssh -p443 -L jakykoliLokalniPort:yahooServer:yahooPort strojpreskterytuneluju(aPosloucha443)

localhost japort
ssh -p443 -L 12345:yahooserver:5050 strojpreskterytuneluju

A:
ip tunel add tunelB mode gre remote 172.19.136.13 local 172.16.0.1
ip link set tunelB up
ip link add 192.168.101.1 dev tunelB (adresa shodna s eth1, nemusi)
ip route add 192.168.201.0/24 dev tunelB
B:
ip tunel add tunelA mode gre remote 172.16.0.1 local 172.19.136.13
ip link set tunelA up
ip link add 192.168.201.1 dev tunelA
ip route add 192.168.101.0/24 dev tunelA