AbcLinuxu:/ Poradna / Linuxová poradna / OpenVpn neroutuje do vnitrni site

Štítky: crt, DNS, Internet, klient, konfigurace, OpenVPN, PC, server, sítě

Dotaz: OpenVpn neroutuje do vnitrni site

7.8.2009 19:02 chinook | skóre: 28
OpenVpn neroutuje do vnitrni site

Přečteno: 583×

Odpovědět | Admin

mam FW na kterem bezi OpenVpn server. Za FW je sit PC. Pripojeni na server probehne bez problemu, ale pokud se chci dostat k pc co je v siti, tak tam se jiz nedostanu. Nevi kde muze byt chyba?

konfigurace serveru:



local 85.x.x.98
port 1194
proto udp

mode server
tls-server
dev tun
server 192.168.121.0 255.255.255.0
duplicate-cn

client-to-client

push "dhcp-option DOMAIN doma.cz"
push "route 192.168.120.0 255.255.255.0"
push "dhcp-option DNS 192.168.120.254"
push "dhcp-option WINS 192.168.120.254"

ca /etc/openvpn/cacert.pem
cert /etc/openvpn/vpn.crt
key /etc/openvpn/vpn.key
dh /etc/openvpn/dh1024.pem
ifconfig-pool-persist ipp.txt
log-append /var/log/openvpn
verb 9
status /var/run/openvpn/vpn.status 10


user openvpn
group openvpn
comp-lzo
verb 3
keepalive 10 60

konfigurace klienta:



client
remote 85.x.x.98
port 1194
proto udp
tls-client
dev tun
pull

mute 10
ca cacert.pem
cert klient.crt
key klient.key

comp-lzo
verb 3

Nástroje: Začni sledovat (2) ?

Odpovědi

7.8.2009 19:12 H0ax | skóre: 36 | blog: Odnikud_nikam
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Nemá klientské pc stejný rozsah adres jako síť za tou vpn?

uid=0(root) gid=0(root) skupiny=0(root)

8.8.2009 08:12 chinook | skóre: 28
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Ne nema.

7.8.2009 21:43 R
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OpenVPN neroutuje, ale vytvara VPN. Routuje jadro - takze pozri ipv4_forwarding a nastavenie iptables.

8.8.2009 08:14 chinook | skóre: 28
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cat /proc/sys/net/ipv4/ip_forward
1

Co konkretne ma byt v iptables? Na FW bezi NAT a z vnitrni site co je za nim routuje. Jen to VPN neodroutuje.

8.8.2009 16:24 R
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Musi to byt povolene z VPN rozsahu donutra.

8.8.2009 16:14 1john2 | skóre: 35 | blog: jo12hn | zlín, brno
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Co konkrétně máte v iptables? Co poví 'ip r s'?

8.8.2009 18:31 chinook | skóre: 28
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ip r s
192.168.121.2 dev tun0  proto kernel  scope link  src 192.168.121.1
85.x.x.96/29 dev eth0  scope link  src 85.x.x.98
10.0.0.0/24 dev eth1  scope link  src 10.0.0.1
10.0.1.0/24 dev eth1  proto kernel  scope link  src 10.0.1.1
192.168.120.0/24 dev eth2  proto kernel  scope link  src 192.168.120.254
192.168.121.0/24 via 192.168.121.2 dev tun0
169.254.0.0/16 dev eth2  scope link
default via 10.0.0.138 dev eth1


iptables -L -n -v
Chain INPUT (policy ACCEPT 750K packets, 214M bytes)
 pkts bytes target     prot opt in     out     source               destination
   
Chain FORWARD (policy ACCEPT 234K packets, 104M bytes)
 pkts bytes target     prot opt in     out     source               destination
    3   156 LOG        tcp  --  eth2   *       0.0.0.0/0            0.0.0.0/0           tcp dpt:25 LOG flags 0 level 4
    3   156 REJECT     tcp  --  eth2   *       0.0.0.0/0            0.0.0.0/0           tcp dpt:25 reject-with icmp-port-unreachable

Chain OUTPUT (policy ACCEPT 910K packets, 1015M bytes)
 pkts bytes target     prot opt in     out     source               destination


iptables -t nat -L -n -v
Chain PREROUTING (policy ACCEPT 18971 packets, 2107K bytes)
 pkts bytes target     prot opt in     out     source               destination
    0     0 DNAT       tcp  --  eth0   *       0.0.0.0/0            0.0.0.0/0           tcp dpt:6900 to:192.168.120.61
    0     0 DNAT       tcp  --  eth0   *       0.0.0.0/0            0.0.0.0/0           tcp dpt:33898 to:192.168.120.51:3389
    0     0 DNAT       tcp  --  eth0   *       0.0.0.0/0            0.0.0.0/0           tcp dpt:33894 to:192.168.120.37:3389
    0     0 DNAT       tcp  --  eth0   *       0.0.0.0/0            0.0.0.0/0           tcp dpt:33893 to:192.168.120.59:3389
    1    48 DNAT       tcp  --  eth0   *       0.0.0.0/0            0.0.0.0/0           tcp dpt:33892 to:192.168.120.12:3389
    0     0 DNAT       tcp  --  eth0   *       0.0.0.0/0            0.0.0.0/0           tcp dpt:33891 to:192.168.120.37:3389
    0     0 DNAT       tcp  --  eth1   *       0.0.0.0/0            0.0.0.0/0           tcp dpt:995 to:192.168.120.4:995
  829 41888 DNAT       tcp  --  eth1   *       0.0.0.0/0            0.0.0.0/0           tcp dpt:143 to:192.168.120.4:143
  167  8480 DNAT       tcp  --  eth1   *       0.0.0.0/0            0.0.0.0/0           tcp dpt:110 to:192.168.120.4:110
   45  2280 DNAT       tcp  --  eth1   *       0.0.0.0/0            0.0.0.0/0           tcp dpt:443 to:192.168.120.4:443
    1    60 DNAT       tcp  --  eth1   *       0.0.0.0/0            0.0.0.0/0           tcp dpt:21 to:192.168.120.2:21
    0     0 DNAT       tcp  --  eth1   *       0.0.0.0/0            0.0.0.0/0           tcp dpt:993 to:192.168.120.4
    0     0 DNAT       tcp  --  eth1   *       0.0.0.0/0            0.0.0.0/0           tcp dpt:465 to:192.168.120.4
    0     0 DNAT       tcp  --  eth1   *       0.0.0.0/0            0.0.0.0/0           tcp dpt:5955 to:192.168.120.5:5900
    0     0 DNAT       tcp  --  eth1   *       0.0.0.0/0            0.0.0.0/0           tcp dpt:5956 to:192.168.120.5:3389
    0     0 DNAT       tcp  --  eth1   *       0.0.0.0/0            0.0.0.0/0           tcp dpt:389 to:192.168.120.4
    0     0 DNAT       tcp  --  eth1   *       0.0.0.0/0            0.0.0.0/0           tcp dpt:33895 to:192.168.120.2:3389
   
Chain POSTROUTING (policy ACCEPT 30127 packets, 1976K bytes)
 pkts bytes target     prot opt in     out     source               destination
 2352  154K MASQUERADE  all  --  *      eth0    0.0.0.0/0            0.0.0.0/0
88164 7127K MASQUERADE  all  --  *      eth1    0.0.0.0/0            0.0.0.0/0

Chain OUTPUT (policy ACCEPT 116K packets, 8981K bytes)
 pkts bytes target     prot opt in     out     source               destination



 iptables -t mangle -L -n -v
Chain PREROUTING (policy ACCEPT 1784K packets, 1305M bytes)
 pkts bytes target     prot opt in     out     source               destination
 928K 1070M RADIO      all  --  eth2   *       0.0.0.0/0            0.0.0.0/0
 928K 1070M O2         all  --  eth2   *       0.0.0.0/0            0.0.0.0/0
 928K 1070M SKYNET     all  --  eth2   *       0.0.0.0/0            0.0.0.0/0

Chain INPUT (policy ACCEPT 1550K packets, 1201M bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain FORWARD (policy ACCEPT 234K packets, 104M bytes)
 pkts bytes target     prot opt in     out     source               destination
38819 8946K OUTCOUNTETH0  all  --  *      eth0    0.0.0.0/0           !192.168.120.0/24
89228   73M OUTCOUNTETH1  all  --  *      eth1    0.0.0.0/0           !192.168.120.0/24

Chain OUTPUT (policy ACCEPT 909K packets, 1015M bytes)
 pkts bytes target     prot opt in     out     source               destination
    0     0 MARK       tcp  --  *      eth0    0.0.0.0/0            0.0.0.0/0           tcp dpt:25 MARK set 0x12
  935 70623 MARK       tcp  --  *      eth1    0.0.0.0/0            0.0.0.0/0           tcp dpt:80 MARK set 0xe
 127K  666M MARK       tcp  --  *      eth1    0.0.0.0/0            0.0.0.0/0           tcp dpt:25 MARK set 0x12
    0     0 MARK       tcp  --  *      eth0    0.0.0.0/0            0.0.0.0/0           tcp dpt:80 MARK set 0xe

Chain POSTROUTING (policy ACCEPT 1143K packets, 1119M bytes)
 pkts bytes target     prot opt in     out     source               destination
1143K 1119M DATA_IN    all  --  *      *       0.0.0.0/0            0.0.0.0/0


Chain O2 (1 references)
 pkts bytes target     prot opt in     out     source               destination
 1009  237K MARK       all  --  eth2   *       192.168.120.11       0.0.0.0/0           MARK set 0x65
    0     0 MARK       all  --  eth2   *       192.168.120.33       0.0.0.0/0           MARK set 0x65
86026   61M MARK       all  --  eth2   *       192.168.120.2        0.0.0.0/0           MARK set 0x65
    0     0 MARK       all  --  eth2   *       192.168.120.5        0.0.0.0/0           MARK set 0x65
 795K  998M MARK       tcp  --  eth2   *       192.168.120.4        0.0.0.0/0           tcp spt:!80 MARK set 0x65

Chain OUTCOUNTETH0 (1 references)
 pkts bytes target     prot opt in     out     source               destination
   31  3394 MARK       icmp --  eth2   eth0    0.0.0.0/0            0.0.0.0/0           MARK set 0xb
 3738 4516K MARK       tcp  --  eth2   eth0    0.0.0.0/0            0.0.0.0/0           tcp dpt:22 MARK set 0xc
 8574 1220K MARK       tcp  --  eth2   eth0    0.0.0.0/0            0.0.0.0/0           tcp dpt:80 MARK set 0xe
 3807 1361K MARK       tcp  --  eth2   eth0    0.0.0.0/0            0.0.0.0/0           tcp dpt:443 MARK set 0xd

Chain OUTCOUNTETH1 (1 references)
 pkts bytes target     prot opt in     out     source               destination
    1    60 MARK       icmp --  eth2   eth1    0.0.0.0/0            0.0.0.0/0           MARK set 0xb
   14  1056 MARK       tcp  --  eth2   eth1    0.0.0.0/0            0.0.0.0/0           tcp dpt:22 MARK set 0xc
  840  137K MARK       tcp  --  eth2   eth1    0.0.0.0/0            0.0.0.0/0           tcp dpt:80 MARK set 0xe
  204  158K MARK       tcp  --  eth2   eth1    0.0.0.0/0            0.0.0.0/0           tcp dpt:443 MARK set 0xd
88019   73M MARK       all  --  eth2   eth1    192.168.120.4        0.0.0.0/0           MARK set 0xf
  431  126K MARK       all  --  eth2   eth1    192.168.120.2        0.0.0.0/0           MARK set 0x11

Chain RADIO (1 references)
 pkts bytes target     prot opt in     out     source               destination
 928K 1070M MARK       all  --  eth2   *       192.168.120.0/24     0.0.0.0/0           MARK set 0x66

Chain SKYNET (1 references)
 pkts bytes target     prot opt in     out     source               destination
    0     0 MARK       all  --  eth2   *       192.168.120.3        0.0.0.0/0           MARK set 0x64

sit za FW ma IP 192.168.120.0/24

VPN sit ma IP 192.168.121.0/24

a Jsout ma 3ISP 1 na eth0 a 2 na eth1

na eth2 je pripojen vnitrni sit

8.8.2009 20:53 NN
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Viz:

192.168.120.0/24 dev eth2 proto kernel scope link src 192.168.120.254 192.168.121.0/24 via 192.168.121.2 dev tun0

Mel by si mit FORWARD z tun0 na eth2:

iptables -A FORWARD -i tun0 -o eth2 -j ACCEPT

9.8.2009 09:48 chinook | skóre: 28
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standardni politika je:


Chain FORWARD (policy ACCEPT 234K packets, 104M bytes)

takze toto nepomaha...

9.8.2009 18:26 Lachmex | skóre: 11
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jen point - jak vypada (po pripojeni) routovaci tabulka na strane klienta? ...a jeste testnete pripojeni BEZ komprese (lzo). Uz mi to parkrat 'zaskodilo' :)

20.8.2009 23:00 chinook | skóre: 28
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Tak uz jsem objevil problem. Je prave tady:


Chain RADIO (1 references)
 pkts bytes target     prot opt in     out     source               destination
 928K 1070M MARK       all  --  eth2   *       192.168.120.0/24     0.0.0.0/0           MARK set 0x66

Smerem do site paket projde, ale kdyz se vraci zpet ke klientovi, tak je oznacen na 0x66 a hozen do RADIO misto do TUN0. Proto se jiz nedostane k cili. Bohuzel nevim jak jej rozlisit od ostatnich paketu :(

21.8.2009 13:36 Zdenek
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Jednoduse. Nemarkujte, kdyz dst je 192.168.121.0/24 tj. rozsah VPN.

21.8.2009 14:09 chinook | skóre: 28
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Ja tam dal tady toto a nepomohlo.


iptables -t mangle -I RADIO -d 192.168.121.0/24 -j RETURN

4.9.2009 08:18 chinook | skóre: 28
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Opravdu nikdo neporadi, jak ten paket rozlisit nebo jak zmenit routovaci tabulku, aby to chodilo? Ted mam to OPENVPN rozbehane na serveru co je za FW a beha to tam bez problemu. A jeste jedna otazka, kde je lepsi VPN server provozovat, primo na FW nebo az za nim?

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