Help with port forwarding on Openvpn client



  • Hi,

    I have a virtualbox pfsense connected through openvpn to another physical pfsense.
    I want to connect through RDP (TCP 3389) to a box behind the virtualbox pfsense.
    I've also setup the openvpn as a default gateway for all the traffic like http://www.ibvpn.com/billing/knowledgebase/63/OpenVPN-setup-on-pfSense-firewall.html
    telnet from openvpn server side and from virtualbox pfsense client indicate there is an issue with NAT (port forwarding).

    my rules.debug below:

    
    set limit tables 3000
    set optimization normal
    set timeout { adaptive.start 0, adaptive.end 0 }
    set limit states 10000
    set limit src-nodes 10000
    
    #System aliases
    
    loopback = "{ lo0 }"
    WAN = "{ em2 }"
    LAN = "{ em1 }"
    OPENVPN = "{ ovpnc1 }"
    OpenVPN = "{ openvpn }"
    
    #SSH Lockout Table
    table <sshlockout>persist
    table <webconfiguratorlockout>persist
    #Snort tables
    table <snort2c>table <virusprot>table <bogons>persist file "/etc/bogons"
    table <bogonsv6>persist file "/etc/bogonsv6"
    table <negate_networks># User Aliases 
    
    # Gateways
    GWOPENVPN_VPNV4 = " route-to ( ovpnc1 192.168.1.5 ) "
    GWWAN_DHCP = " route-to ( em2 172.16.198.1 ) "
    GWWAN_DHCP6 = " route-to ( em2 172.16.198.1 ) "
    GWOPENVPN_VPNV6 = " route-to ( ovpnc1 192.168.1.5 ) "
    
    set loginterface em1
    
    set skip on pfsync0
    
    scrub on $WAN all    fragment reassemble
    scrub on $LAN all    fragment reassemble
    scrub on $OPENVPN all    fragment reassemble
    
    no nat proto carp
    no rdr proto carp
    nat-anchor "natearly/*"
    nat-anchor "natrules/*"
    
    # Outbound NAT rules
    nat on $WAN  from 192.168.56.0/24 to any port 500 -> 172.16.198.142/32  static-port
    nat on $WAN  from 192.168.56.0/24 to any -> 172.16.198.142/32 port 1024:65535  
    nat on $WAN  from 127.0.0.0/8 to any -> 172.16.198.142/32 port 1024:65535  
    nat on $OPENVPN  from 192.168.56.0/24 to any port 500 -> 192.168.1.6/32  static-port
    nat on $OPENVPN  from 192.168.56.0/24 to any -> 192.168.1.6/32 port 1024:65535  
    nat on $OPENVPN  from 127.0.0.0/8 to any -> 192.168.1.6/32 port 1024:65535  
    
    # Load balancing anchor
    rdr-anchor "relayd/*"
    # TFTP proxy
    rdr-anchor "tftp-proxy/*"
    # NAT Inbound Redirects
    rdr on ovpnc1 proto tcp from any to 192.168.1.6 port 3389 -> 192.168.56.101
    # UPnPd rdr anchor
    rdr-anchor "miniupnpd"
    
    anchor "relayd/*"
    anchor "openvpn/*"
    anchor "ipsec/*"
    #---------------------------------------------------------------------------
    # default deny rules
    #---------------------------------------------------------------------------
    block in log inet all label "Default deny rule IPv4"
    block out log inet all label "Default deny rule IPv4"
    block in log inet6 all label "Default deny rule IPv6"
    block out log inet6 all label "Default deny rule IPv6"
    
    # IPv6 ICMP is not auxilary, it is required for operation
    # See man icmp6(4)
    # 1    unreach         Destination unreachable
    # 2    toobig          Packet too big
    # 128  echoreq         Echo service request
    # 129  echorep         Echo service reply
    # 133  routersol       Router solicitation
    # 134  routeradv       Router advertisement
    # 135  neighbrsol      Neighbor solicitation
    # 136  neighbradv      Neighbor advertisement
    pass quick inet6 proto ipv6-icmp from any to any icmp6-type {1,2,135,136} keep state
    
    # Allow only bare essential icmpv6 packets (NS, NA, and RA, echoreq, echorep)
    pass out quick inet6 proto ipv6-icmp from fe80::/10 to fe80::/10 icmp6-type {129,133,134,135,136} keep state
    pass out quick inet6 proto ipv6-icmp from fe80::/10 to ff02::/16 icmp6-type {129,133,134,135,136} keep state
    pass in quick inet6 proto ipv6-icmp from fe80::/10 to fe80::/10 icmp6-type {128,133,134,135,136} keep state
    pass in quick inet6 proto ipv6-icmp from ff02::/16 to fe80::/10 icmp6-type {128,133,134,135,136} keep state
    pass in quick inet6 proto ipv6-icmp from fe80::/10 to ff02::/16 icmp6-type {128,133,134,135,136} keep state
    
    # We use the mighty pf, we cannot be fooled.
    block quick inet proto { tcp, udp } from any port = 0 to any
    block quick inet proto { tcp, udp } from any to any port = 0
    block quick inet6 proto { tcp, udp } from any port = 0 to any
    block quick inet6 proto { tcp, udp } from any to any port = 0
    
    # Snort package
    block quick from <snort2c>to any label "Block snort2c hosts"
    block quick from any to <snort2c>label "Block snort2c hosts"
    
    # SSH lockout
    block in log quick proto tcp from <sshlockout>to any port 22 label "sshlockout"
    
    # webConfigurator lockout
    block in log quick proto tcp from <webconfiguratorlockout>to any port 80 label "webConfiguratorlockout"
    block in quick from <virusprot>to any label "virusprot overload table"
    # block bogon networks
    # http://www.cymru.com/Documents/bogon-bn-nonagg.txt
    # http://www.team-cymru.org/Services/Bogons/fullbogons-ipv6.txt
    block in log quick on $WAN from <bogons>to any label "block bogon IPv4 networks from WAN"
    block in log quick on $WAN from <bogonsv6>to any label "block bogon IPv6 networks from WAN"
    antispoof for em2
    # allow our DHCP client out to the WAN
    pass in on $WAN proto udp from any port = 67 to any port = 68 label "allow dhcp client out WAN"
    pass out on $WAN proto udp from any port = 68 to any port = 67 label "allow dhcp client out WAN"
    # Not installing DHCP server firewall rules for WAN which is configured for DHCP.
    # allow our DHCPv6 client out to the WAN
    pass in quick on $WAN proto udp from fe80::/10 port = 546 to fe80::/10 port = 546 label "allow dhcpv6 client in WAN"
    pass in quick on $WAN proto udp from any port = 547 to any port = 546 label "allow dhcpv6 client in WAN"
    pass out quick on $WAN proto udp from any port = 546 to any port = 547 label "allow dhcpv6 client out WAN"
    antispoof for em1
    # allow access to DHCPv6 server on LAN
    # We need inet6 icmp for stateless autoconfig and dhcpv6
    pass quick on $LAN inet6 proto udp from fe80::/10 to fe80::/10 port = 546 label "allow access to DHCPv6 server"
    pass quick on $LAN inet6 proto udp from fe80::/10 to ff02::/16 port = 546 label "allow access to DHCPv6 server"
    pass quick on $LAN inet6 proto udp from fe80::/10 to ff02::/16 port = 547 label "allow access to DHCPv6 server"
    pass quick on $LAN inet6 proto udp from ff02::/16 to fe80::/10 port = 547 label "allow access to DHCPv6 server"
    antispoof for ovpnc1
    
    # loopback
    pass in on $loopback inet all label "pass IPv4 loopback"
    pass out on $loopback inet all label "pass IPv4 loopback"
    pass in on $loopback inet6 all label "pass IPv6 loopback"
    pass out on $loopback inet6 all label "pass IPv6 loopback"
    # let out anything from the firewall host itself and decrypted IPsec traffic
    pass out inet all keep state allow-opts label "let out anything IPv4 from firewall host itself"
    pass out inet6 all keep state allow-opts label "let out anything IPv6 from firewall host itself"
    pass out route-to ( em2 172.16.198.1 ) from 172.16.198.142 to !172.16.198.0/24 keep state allow-opts label "let out anything from firewall host itself"
    pass out route-to ( ovpnc1 192.168.1.5 ) from 192.168.1.6 to !192.168.1.6/32 keep state allow-opts label "let out anything from firewall host itself"
    # make sure the user cannot lock himself out of the webConfigurator or SSH
    pass in quick on em1 proto tcp from any to (em1) port { 80 22 } keep state label "anti-lockout rule"
    
    # User-defined rules follow
    
    anchor "userrules/*"
    pass  in  quick  on $LAN inet from 192.168.56.0/24 to any keep state  label "USER_RULE: Default allow LAN to any rule"
    # at the break! label "USER_RULE: Default allow LAN IPv6 to any rule"
    pass  in  quick  on $LAN inet from 192.168.56.0/24  to <negate_networks>keep state  label "NEGATE_ROUTE: Negate policy routing for destination"
    pass  in  quick  on $LAN  $GWOPENVPN_VPNV4 inet from 192.168.56.0/24 to any keep state  label "USER_RULE"
    pass  in  quick  on $OPENVPN reply-to ( ovpnc1 192.168.1.5 ) inet proto tcp  from any to 192.168.56.101 port 3389 flags S/SA keep state  label "USER_RULE: NAT "
    
    # VPN Rules
    
    anchor "tftp-proxy/*"</negate_networks></bogonsv6></bogons></virusprot></webconfiguratorlockout></sshlockout></snort2c></snort2c></negate_networks></bogonsv6></bogons></virusprot></snort2c></webconfiguratorlockout></sshlockout> 
    


  • anyone?