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IPSec VPN can´t reach network

Hey there,

I´ve configured an IPSec Remote Access.I can connect the Client to the VPN an I also able to ping the firewall over the VPN. But I´m not able to ping a Host in the VPN Network. I´m also able to reach the Internet over the VPN tunnel.

If I do an tcpdump I can see, the Host in the VPN Network is answering the ping from the client.

SFV2C4MSP_SO01_SFOS 18.0.4 MR-4# tcpdump 'host 172.19.20.100' and 'host 10.0.1.20'
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on any, link-type LINUX_SLL (Linux cooked v1), capture size 262144 bytes
17:18:44.682144 ipsec0, IN: IP 172.19.20.100 > 10.0.1.20: ICMP echo request, id 1, seq 120, length 40
17:18:44.683509 Port1, OUT: IP 172.19.20.100 > 10.0.1.20: ICMP echo request, id 1, seq 120, length 40
17:18:44.684125 Port1, IN: IP 10.0.1.20 > 172.19.20.100: ICMP echo reply, id 1, seq 120, length 40
17:18:44.697183 Port2, OUT: IP 10.0.1.20 > 172.19.20.100: ICMP echo reply, id 1, seq 120, length 40
17:18:49.345167 ipsec0, IN: IP 172.19.20.100 > 10.0.1.20: ICMP echo request, id 1, seq 121, length 40
17:18:49.345426 Port1, OUT: IP 172.19.20.100 > 10.0.1.20: ICMP echo request, id 1, seq 121, length 40
17:18:49.345878 Port1, IN: IP 10.0.1.20 > 172.19.20.100: ICMP echo reply, id 1, seq 121, length 40
17:18:49.346036 Port2, OUT: IP 10.0.1.20 > 172.19.20.100: ICMP echo reply, id 1, seq 121, length 40
17:18:54.357964 ipsec0, IN: IP 172.19.20.100 > 10.0.1.20: ICMP echo request, id 1, seq 122, length 40
17:18:54.358213 Port1, OUT: IP 172.19.20.100 > 10.0.1.20: ICMP echo request, id 1, seq 122, length 40
17:18:54.358629 Port1, IN: IP 10.0.1.20 > 172.19.20.100: ICMP echo reply, id 1, seq 122, length 40
17:18:54.358853 Port2, OUT: IP 10.0.1.20 > 172.19.20.100: ICMP echo reply, id 1, seq 122, length 40

10.0.1.20 is a Server in the VPN Network which I can´t reach, 172.19.20.100 is the VPN Client.

On the Client I get a simple timeout message.

This is my VPN Config:

Routing table of the XG:

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
10.0.1.0        *               255.255.255.0   U     0      0        0 Port1
10.0.2.0        *               255.255.255.0   U     0      0        0 Port3
10.0.3.0        *               255.255.255.0   U     0      0        0 Port4
10.0.4.0        *               255.255.255.0   U     0      0        0 Port5
10.0.222.0      *               255.255.255.0   U     0      0        0 tun0
10.100.100.0    *               255.255.255.0   U     0      0        0 xfrm5
10.100.203.0    *               255.255.255.252 U     0      0        0 xfrm9
10.200.201.0    *               255.255.255.252 U     0      0        0 xfrm8
10.255.0.0      *               255.255.255.0   U     0      0        0 GuestAP
<WAN-IP NET>      *               255.255.255.0   U     0      0        0 Port6
<WAN-IP NET>    *               255.255.255.0   U     0      0        0 Port2
192.168.1.0     10.100.100.1    255.255.255.0   UG    0      0        0 xfrm5
192.168.5.0     10.100.203.2    255.255.255.0   UG    0      0        0 xfrm9
192.168.104.0   10.100.100.1    255.255.255.0   UG    0      0        0 xfrm5

I also tried to create a any/any Firewall rule to check if I failed a firewall rule but I didn´t change anything,

Any Idea how I can get this Work? Thanks!

Dennis



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Parents Reply
  • Hallo Philipp,

    ich denke schon, dass die Sophos eine Route für das VPN Netz hat, da sie das ja durch die VPN Einstellungen selbst "erstellt" hat. Ansonsten müsste nach meinem Dafürhalten ja auch der Ping auf das Gateway 10.0.1.254 fehlschlagen.

    Ich wüsste auch nicht wirklich,wo ich die Route einstellen sollte, da ich das Interface für den Remote IPSec Tunnel gar nicht sehen kann.

    Grüße!

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