possibly bridge related problem

Tue Aug 19 09:09:57 UTC 2008

Hi,

I have strange network problem on my laptop.
I can't make connection to my desktop(192.168.0.18) from my laptop.
However I can ping to other addresses from my laptop.
I can't ping and make connection to my laptop from my desktop either.

On the laptop I have bridge created at boot time.
When I destroy bridge0 I can ping and make connection to my desktop.
Is this known problem? If not where should I look for the problem?
Or am I doing something wrong?

...
devil# uname -an 
FreeBSD devil.micom.mng.net 7.0-STABLE FreeBSD 7.0-STABLE #8: Tue Aug 19 
15:29:26 ULAT 2008     
tsgan at devil.micom.mng.net:/usr/obj/usr/src/sys/DEVIL  i386
devil# ping 192.168.0.1 
PING 192.168.0.1 (192.168.0.1): 56 data bytes
64 bytes from 192.168.0.1: icmp_seq=0 ttl=255 time=0.920 ms
64 bytes from 192.168.0.1: icmp_seq=1 ttl=255 time=1.788 ms
64 bytes from 192.168.0.1: icmp_seq=2 ttl=255 time=1.130 ms
^C
--- 192.168.0.1 ping statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 0.920/1.279/1.788/0.370 ms

devil# ping 192.168.0.18 
PING 192.168.0.18 (192.168.0.18): 56 data bytes
^C
--- 192.168.0.18 ping statistics ---
4 packets transmitted, 0 packets received, 100.0% packet loss

devil# ifconfig -a 
bge0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 
0 mtu 1500
    options=98<VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM>
    ether 00:14:22:fb:32:a6
    inet 192.168.0.35 netmask 0xffffff00 broadcast 192.168.0.255
    media: Ethernet autoselect (1000baseTX <full-duplex>)
    status: active
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
    inet 127.0.0.1 netmask 0xff000000 
bridge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 
1500
    ether 00:14:22:fb:32:a6
    id 00:00:00:00:00:00 priority 32768 hellotime 2 fwddelay 15
    maxage 20 holdcnt 6 proto rstp maxaddr 100 timeout 1200
    root id 00:00:00:00:00:00 priority 32768 ifcost 0 port 0
    member: tap0 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
            ifmaxaddr 0 port 4 priority 128 path cost 2000000
    member: bge0 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
            ifmaxaddr 0 port 1 priority 128 path cost 20000
tap0: flags=8902<BROADCAST,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
    ether 00:bd:4b:1b:00:00
tun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> metric 0 mtu 1500
    inet 192.168.10.34 --> 192.168.10.33 netmask 0xffffffff 
    Opened by PID 802

devil# kldstat 
Id Refs Address    Size     Name
 1   22 0xc0400000 701a64   kernel
 2    1 0xc0b02000 5844     if_tap.ko
 3    1 0xc0b08000 15524    snd_hda.ko
 4    2 0xc0b1e000 52a08    sound.ko
 5    2 0xc0b71000 10ebc    drm.ko
 6    1 0xc0b82000 71c4     i915.ko
 7    1 0xc0b8a000 1fe68    kqemu.ko
 8    1 0xc0baa000 b8c8     aio.ko
 9    1 0xc0bb6000 6b3d0    acpi.ko
10    1 0xc433b000 9000     if_bridge.ko
11    1 0xc4344000 6000     bridgestp.ko
12    2 0xc44c2000 d000     ipfw.ko
13    1 0xc44fb000 4000     ipdivert.ko
14    1 0xc452a000 22000    linux.ko
15    1 0xc45a6000 e000     fuse.ko

devil# more /etc/rc.conf  

cloned_interfaces="bridge0 tap0"
firewall_enable="YES"
firewall_quiet="NO"
firewall_script="/etc/rc.firewall"
firewall_type="open"
gateway_enable="YES"
hostname="devil.micom.mng.net"

ifconfig_bge0="DHCP"
ifconfig_bridge0="addm bge0 addm tap0 up"
inetd_enable="YES"

natd_enable="YES"                # Enable natd (if firewall_enable == YES).
natd_interface="bge0"               # Public interface or IPaddress to use.
openvpn_enable="YES"
openvpn_if="tun"

devil# ipfw show 
00050 224 19723 divert 8668 ip4 from any to any via bge0
00100   4   200 allow ip from any to any via lo0
00200   0     0 deny ip from any to 127.0.0.0/8
00300   0     0 deny ip from 127.0.0.0/8 to any
65000 383 33187 allow ip from any to any
65535   0     0 deny ip from any to any

devil# netstat -rn 
Routing tables

Internet:
Destination        Gateway            Flags    Refs      Use  Netif Expire
default            192.168.0.1        UGS         0      205   bge0
127.0.0.1          127.0.0.1          UH          0        2    lo0
192.168.0.0/24     link#1             UC          0        0   bge0
192.168.0.1        00:e0:29:3b:5a:b0  UHLW        2       10   bge0   1099
192.168.10.0/24    192.168.10.33      UGS         0        0   tun0
192.168.10.33      192.168.10.34      UH          1        0   tun0

...

thanks,

Ganbold

-- 
Algol-60 surely must be regarded as the most important programming 
language yet developed. -- T. Cheatham