IPFW IPFW nat. Wheres my packets?

Doctor_Dark

New Member


Messages: 1

Hi. I had server with few interfaces

ifconfig:
Code:
vlan4021: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
    options=80002<TXCSUM,LINKSTATE>
    ether c0:25:e9:1e:73:cd
    inet 172.16.0.1 netmask 0xfffffffc broadcast 172.16.0.3
    inet 10.0.1.1 netmask 0xffffff00 broadcast 10.0.1.255
    inet 192.168.88.1 netmask 0xffffff00 broadcast 192.168.88.255
    groups: vlan
    vlan: 4021 vlanpcp: 0 parent interface: re1
    media: Ethernet 1000baseT <full-duplex>
    status: active
    nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
vlan4094: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
    options=80002<TXCSUM,LINKSTATE>
    ether c0:25:e9:1e:73:cd
    inet 10.1.1.1 netmask 0xffffff00 broadcast 10.1.1.255
    groups: vlan
    vlan: 4094 vlanpcp: 0 parent interface: re1
    media: Ethernet 1000baseT <full-duplex>
    status: active
vlan4021-10: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
    options=28<VLAN_MTU,JUMBO_MTU>
    ether c0:25:e9:1e:73:cd
    inet 10.1.2.1 netmask 0xffffff00 broadcast 10.1.2.255
    inet6 fe80::c225:e9ff:fe1e:73cd%vlan4021-10 prefixlen 64 tentative scopeid 0xa
    media: Ethernet autoselect (1000baseT <full-duplex>)
    status: active
    nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
netstat -r:
Code:
default            XXXXX US         XXX
10.0.0.0/8         172.16.0.2         UGS    vlan4021
10.0.1.0/24        link#6             U      vlan4021
10.0.1.1           link#6             UHS         lo0
10.1.1.0/24        link#7             U      vlan4094
10.1.1.1           link#7             UHS         lo0
10.1.2.0/24        link#10            U      vlan4021
10.1.2.1           link#10            UHS         lo0
10.2.2.1           link#9             UHS         lo0
localhost          link#3             UH          lo0
172.16.0.0/30      link#6             U      vlan4021
172.16.0.1         link#6             UHS         lo0
ipfw list:
Code:
00100 check-state :default
00500 allow tcp from any to any via vlan4094
00600 allow udp from any to any via vlan4094
00700 allow icmp from any to any via vlan4094
01000 allow ip from any to any via lo0
01600 nat 2 ip from any to 10.0.1.0/24 via vlan4021
01700 nat 3 ip from any to 10.0.0.0/8 via vlan4021
01800 allow log logamount 50 ip from 10.0.0.0/8 to any via vlan4021
01900 allow ip from any to any via vlan4021-10 keep-state :default

ipfw nat show config
Code:
ipfw nat 2 config ip 10.0.1.1 deny_in same_ports reset
ipfw nat 3 config ip 172.16.0.1 log same_ports
at such a config in a net 10.0.1.0/24 packets pass from everywhere, nat works.

but there is no access to the 10.0.0.0/8 net from the 10.1.1.0/24 network. Moreover, tcpdump says that responses to ip 172.16.0.1 come. But on the vlan4021 interface they are no longer there. I ask for help with my problem and thank you in advance!)
 
Last edited by a moderator:
Top