Dotaz: OpenVPN - (asi) chyba v routovani

[Zubbik]

Preji vsem hezky den a rovnou se omlouvam, ze otravuju s touto veci, o ktere se tu toho napsalo uz mraky, ale ani presto jsem nedosel k cili.

Mam linuxovy router, v nem 3 sitove karty a nainstalovane OpenVPN. Muj problem spociva v tom, ze mam vnitrni site 192.168.1.0/24 a dve vnejsi 192.168.50.0/24 a 192.168.100.0/24. Soucasna situace vypada tak, ze ve vnitrni siti mam pripojeny pocitac s ip 192.168.1.50 a na vnejsi mam pocitac 192.168.50.167. Na pocitaci s ip 192.168.50.167 jsou win XP a nainstalovany klient OpenVPN. Bez problemu se s nim pripojim na server, OpenVPN podle vseho funguje jak ma, ale negunguje mi ping do vnitrni site. Jedine, kam se dopingnu je 192.168.10.1 (ip vpn) a na 192.168.1.254 (ip adresa sit. karty smerujici do vnitrni site). Ale dal na 192.168.1.50 uz nic. A uz nevim, co s tim, poradite mi nekdo?

Par vypisu:

gw:/etc/openvpn # ifconfig
eth0      Link encap:Ethernet  HWaddr 00:0A:E4:03:35:07
          inet addr:192.168.1.254  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::20a:e4ff:fe03:3507/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:5531 errors:0 dropped:0 overruns:0 frame:0
          TX packets:5788 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:598523 (584.4 Kb)  TX bytes:596932 (582.9 Kb)
          Base address:0x4400 Memory:fcde0000-fce00000

eth3      Link encap:Ethernet  HWaddr 00:30:4F:4E:4E:EC
          inet addr:192.168.50.40  Bcast:192.168.50.255  Mask:255.255.255.0
          inet6 addr: fe80::230:4fff:fe4e:4eec/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:10402 errors:0 dropped:0 overruns:0 frame:0
          TX packets:10797 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1029183 (1005.0 Kb)  TX bytes:2321009 (2.2 Mb)
          Interrupt:185 Base address:0x8c00

eth4      Link encap:Ethernet  HWaddr 00:30:4F:4E:74:AE
          inet addr:192.168.100.10  Bcast:192.168.100.255  Mask:255.255.255.0
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
          Interrupt:193 Base address:0xac00

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:16436  Metric:1
          RX packets:25 errors:0 dropped:0 overruns:0 frame:0
          TX packets:25 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:2322 (2.2 Kb)  TX bytes:2322 (2.2 Kb)

tun0      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
          inet addr:192.168.10.1  P-t-P:192.168.10.2  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:5 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          RX bytes:300 (300.0 b)  TX bytes:240 (240.0 b)

gw:/etc/openvpn # route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.10.2    0.0.0.0         255.255.255.255 UH    0      0        0 tun0
192.168.100.0   0.0.0.0         255.255.255.0   U     0      0        0 eth4
192.168.50.0    0.0.0.0         255.255.255.0   U     0      0        0 eth3
192.168.1.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0
192.168.10.0    192.168.10.2    255.255.255.0   UG    0      0        0 tun0
169.254.0.0     0.0.0.0         255.255.0.0     U     0      0        0 eth0
127.0.0.0       0.0.0.0         255.0.0.0       U     0      0        0 lo
0.0.0.0         192.168.50.254  0.0.0.0         UG    0      0        0 eth3


C:\Documents and Settings\Martin>route PRINT
===========================================================================
Seznam rozhraní
0x1 ........................... MS TCP Loopback interface
0x2 ...00 80 ad 88 0a b6 ...... Macronix MX98715-Based Ethernet Adapter (obecnÚ)
 - Packet Scheduler Miniport
0x3 ...00 0c 76 36 72 ae ...... NVIDIA nForce MCP Networking Controller - Packet
 Scheduler Miniport
0x4 ...00 ff a2 5e bc 9f ...... TAP-Win32 Adapter V8 - Packet Scheduler Miniport

===========================================================================
===========================================================================
Aktivní směrování:
       Cíl v síti     Síťová maska            Brána        Rozhraní  Metrika
          0.0.0.0          0.0.0.0   192.168.50.254  192.168.50.167       20
        127.0.0.0        255.0.0.0        127.0.0.1       127.0.0.1       1
      192.168.1.0    255.255.255.0     192.168.10.5    192.168.10.6       1
     192.168.10.1  255.255.255.255     192.168.10.5    192.168.10.6       1
     192.168.10.4  255.255.255.252     192.168.10.6    192.168.10.6       30
     192.168.10.6  255.255.255.255        127.0.0.1       127.0.0.1       30
   192.168.10.255  255.255.255.255     192.168.10.6    192.168.10.6       30
     192.168.50.0    255.255.255.0   192.168.50.167  192.168.50.167       20
   192.168.50.167  255.255.255.255        127.0.0.1       127.0.0.1       20
   192.168.50.255  255.255.255.255   192.168.50.167  192.168.50.167       20
        224.0.0.0        240.0.0.0     192.168.10.6    192.168.10.6       30
        224.0.0.0        240.0.0.0   192.168.50.167  192.168.50.167       20
  255.255.255.255  255.255.255.255     192.168.10.6    192.168.10.6       1
  255.255.255.255  255.255.255.255     192.168.10.6               2       1
  255.255.255.255  255.255.255.255   192.168.50.167  192.168.50.167       1
Výchozí brána:    192.168.50.254
===========================================================================
Trvalé trasy:
  Žádné

Config na serveru:
port 5000
proto udp
dev tun
;up ./server.up

ca /etc/openvpn/certs/ca.crt
cert /etc/openvpn/certs/server.crt
key /etc/openvpn/certs/server.key
dh /etc/openvpn/certs/dh1024.pem

server 192.168.10.0 255.255.255.0
ifconfig-pool-persist ipp2.txt
push "route 192.168.1.0 255.255.255.0"
push "dhcp-option DOMAIN emarcom.cz"

client-to-client
keepalive 10 120
user nobody
group nogroup
comp-lzo
persist-tun
persist-key
log  /var/log/openvpn.log
verb 6

Config na clientu:
remote 192.168.50.40
port 5000
tls-client
proto udp
dev tun
pull
route-method exe
comp-lzo
verb 3

ca MarCom-CA.crt
cert Martin-Kuna.crt
key Martin-Kuna.key

Diky za jakoukoliv radu.

Odpovědi

[houska]

... a co iptables a tabulka FORWARD?

[Zubbik]

Chain FORWARD (policy DROP)
target     prot opt source               destination
TCPMSS     tcp  --  anywhere             anywhere            tcp flags:SYN,RST/SYN TCPMSS clamp to PMTU
forward_int  all  --  anywhere             anywhere
forward_ext  all  --  anywhere             anywhere
forward_ext  all  --  anywhere             anywhere
LOG        all  --  anywhere             anywhere            limit: avg 3/min burst 5 LOG level warning tcp-options ip-options prefix `SFW2-FWD-ILL-ROUTING '
DROP       all  --  anywhere             anywhere

Do iptables prilis nevidim, pouzivam pro nastaveni firewallu Yast, mam SusE.

[Zubbik]

Pro jistoto prikladam cely vypis iptables -L: http://www.bestsite.cz/iptables

[Zubbik]

Vyřešeno, chyba v routování nebyla. Chyba byla v nastavení firewallu, konkrétně opravdu v nastavení pravidel pro FORWARD. Díky za nakopnutí.

[houska]

ha :)