Fait moi voyager

Afin de résoudre certains problèmes il est parfois utile de connaître certaines commande de manipulation du réseau sous linux . D'ou le petit récapitulatif .

Connaitre la table de routage

/*
# ip route show
10.10.10.0/24 dev eth0  proto kernel  scope link  src 10.10.10.11
default via 10.10.10.254 dev eth0
*/

/*
# route -n
Table de routage IP du noyau
Destination     Passerelle      Genmask         Indic Metric Ref    Use Iface
10.8.0.2        0.0.0.0         255.255.255.255 UH    0      0        0 tun0
10.10.20.0      10.8.0.2        255.255.255.0   UG    0      0        0 tun0
10.8.0.0        10.8.0.2        255.255.255.0   UG    0      0        0 tun0
10.10.1.0       10.8.0.2        255.255.255.0   UG    0      0        0 tun0
10.10.10.0      10.8.0.2        255.255.255.0   UG    0      0        0 tun0
88.191.127.0    0.0.0.0         255.255.255.0   U     0      0        0 eth0
0.0.0.0         88.191.127.1    0.0.0.0         UG    0      0        0 eth0
*/

Ajouter une route

/*
# ip route add 10.150.109.192/26 via 10.150.58.1 dev eth2
# ip route add 10.150.109.192/26 via 10.150.58.1
*/

Sur certains systèmes

/*
 
# route add -net 10.150.109.192 netmask 255.255.255.192 gw 10.150.58.1
# route add -net 10.150.109.192 netmask 255.255.255.192 dev eth0
*/

Supprimer une route

/*
# ip route del 10.150.109.192/26 via 10.150.58.1 dev eth2
# route del -net 10.150.109.192 netmask 255.255.255.192 dev eth0
*/

Afficher les interfaces et les informations de bas niveau

/*
# ip link show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether c8:0a:a9:c8:e5:a7 brd ff:ff:ff:ff:ff:ff
3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000
    link/ether c8:0a:a9:c8:e5:a8 brd ff:ff:ff:ff:ff:ff
4: dummy0: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN 
    link/ether f6:e1:76:73:d0:5a brd ff:ff:ff:ff:ff:ff
58: tun0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 100
    link/[65534]
*/