Weird network problem

  • Hi All,

    I have 2 pfsense 2.0.1 with IPsec site-to-site VPN tunnel configured.
    LAN1 ( <–-> FW01 <---Internet---> FW02<--> LAN2 (
    LAN1 GW (                                                        LAN2 GW (

    I have allow any/any in the IPsec tunnel. All my other machine in the LAN1 network is able to ping the machine in the LAN2 network, I can also RDP to my windows server in the LAN2 network.
    I have a Ubuntu server with Zoneminder software in LAN1 network with IP address and and a network camera in LAN2 network with IP adddress Strangely when I ping a machine in the LAN2 network for the first time, the first packet went thru but subsequence packet just cannot go thru.

    lawrence@sgcctv02:~$ ping
    PING ( 56(84) bytes of data.
    From icmp_seq=1 Redirect Host(New nexthop:
    64 bytes from icmp_req=1 ttl=126 time=29.6 ms
    From icmp_seq=2 Destination Host Unreachable
    From icmp_seq=3 Destination Host Unreachable

    I have checked on the ubuntu server and have disabled the ufw and check iptables, nothing is listed. The routing table on the ubuntu server shows:
    Kernel IP routing table
    Destination    Gateway        Genmask        Flags  MSS Window  irtt Iface        UG        0 0          0 eth0    U        0 0          0 eth0

    I have checked my firewall rules and have allowed all traffic on the LAN (any/any) on both side, still I cannot find out where is the problem. I am able to access the web cam configuration menu and view live video from LAN1 network.

    Also I RDP to my windows machine in the LAN2 network and I can ping all my other servers but not the ubuntu server.

    Can somebody tell me if this is an issue on the pfsense or the ubuntu server?

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