[Internet-e-architetture-di-rete] routing statico e dinamico

Mauro Angiolillo m.angiolillo at comuneap.gov.it
Sat Apr 23 15:49:49 CEST 2016


Salve prof,
   di seguito riporto gli istradamenti di uno dei dispositivi di casa:
(legenda:  192.168.0.10/24  - gulliver
           192.168.0.254/24 - gateway
)

[15:31:15 root at gulliver:~] ifconfig
eth0      Link encap:Ethernet  HWaddr 00:e0:6f:28:30:aa
          inet addr:192.168.0.10  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: 2001:b07:2ec:6f88:2e0:6fff:fe28:30aa/64 Scope:Global
          inet6 addr: fe80::2e0:6fff:fe28:30aa/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:212029640 errors:0 dropped:0 overruns:0 frame:0
          TX packets:93016058 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:161016754375 (149.9 GiB)  TX bytes:76428812835 (71.1 GiB)
          Interrupt:19 Memory:f0400000-f0420000

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:250100 errors:0 dropped:0 overruns:0 frame:0
          TX packets:250100 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:23652964 (22.5 MiB)  TX bytes:23652964 (22.5 MiB)

tun0      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
          inet addr:192.168.250.81  P-t-P:192.168.250.82  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:15223222 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8091545 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          RX bytes:19289786368 (17.9 GiB)  TX bytes:443135866 (422.6 MiB)


[15:32:05 root at gulliver:~] netstat -rn46
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
0.0.0.0         192.168.0.254   0.0.0.0         UG        0 0          0 eth0
172.16.0.0      192.168.250.82  255.255.0.0     UG        0 0          0 tun0
172.31.0.0      192.168.250.82  255.255.0.0     UG        0 0          0 tun0
192.168.0.0     0.0.0.0         255.255.255.0   U         0 0          0 eth0
192.168.1.0     192.168.250.82  255.255.255.0   UG        0 0          0 tun0
192.168.2.0     192.168.250.82  255.255.255.0   UG        0 0          0 tun0
192.168.200.0   192.168.250.82  255.255.255.0   UG        0 0          0 tun0
192.168.250.1   192.168.250.82  255.255.255.255 UGH       0 0          0 tun0
192.168.250.82  0.0.0.0         255.255.255.255 UH        0 0          0 tun0
Kernel IPv6 routing table
Destination                    Next Hop                   Flag Met Ref Use If
::1/128                        ::                         U    256 0     0 lo
2001:b07:2ec:6f88::/64         ::                         UAe  256 2 10830 eth0
fe80::/64                      ::                         U    256 2     4 eth0
::/0                           fe80::c6ea:1dff:fe4d:dc26  UGDAe 1024 2 20697 eth0
::/0                           ::                         !n   -1  1 31543 lo
::1/128                        ::                         Un   0   3  5775 lo
2001:b07:2ec:6f88:2e0:6fff:fe28:30aa/128 ::                         Un   0   3364710 lo
fe80::2e0:6fff:fe28:30aa/128   ::                         Un   0   3 64942 lo
ff00::/8                       ::                         U    256 2 32108 eth0
::/0                           ::                         !n   -1  1 31543 lo

Gli instradamenti statici (ipv4)sono impostati su una vpn (openvpn) per raggiungere le reti
a valle del tunnel.
Sul gateway di casa (router adsl), ho impostato le seguenti route (per poter raggiungere le reti
dietro la vpn da qualsiasi altro host di casa):

{gandalf}=>ip rtlist
Label                 Destination Interface        Admin Oper   Mtr         Gateway
-----                 ----------- ---------        ----- ----   ---         -------
[ ... instradamenti pubblici per la connettività voce e adsl... ]

                   192.168.0.0/24 LocalNetwork     UP    [UP]     0
                   192.168.1.0/24 LocalNetwork     UP    [UP]     0    192.168.0.10
                   192.168.2.0/24 LocalNetwork     UP    [UP]     0    192.168.0.10
                 192.168.200.0/24 LocalNetwork     UP    [UP]     0    192.168.0.10
                    172.16.0.0/16 LocalNetwork     UP    [UP]     0    192.168.0.10
                    172.31.0.0/16 LocalNetwork     UP    [UP]     0    192.168.0.10
                        0.0.0.0/0 ipWANData_ADSL   UP    UP       0     x.x.x.x [ ip pubblico del router adsl ]



Mauro


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