[nycbug-talk] FreeBSD Dual homed

[Rodrique Heron]

Dan Langille wrote:
> ... I think I misunderstood you in my original reply.
>
> Rodrique Heron wrote:
>> Hello all-
>>
>> Are there any known issues when FreeBSD is dual homed.
>
> There may be issues, but I have run dual homed FreeBSD since 1998.
>
>
>> I have two interfaces, each connected to a different subnet. Whenever 
>> both are enabled I can't get any incoming network traffic to the server.
>
> Can you elaborate upon this?  It's not clear what you are trying to do.
>
> So one NIC fails to work?  No traffic in or out?  Both nics?
>
> Output of netstat -na would help us understand.
>
> > I'm not
>> routing between the two, therefore no "gateway_enable" in rc.conf. I 
>> don't have any firewalls enabled, I do have my defaultrouter set.
>
> I originally said:
> AFAIK, you cannot route between the two UNLESS you have
> gateway_enable="YES" in /etc/rc.conf.
>
> But what you mean is that you do not wish to route between the two 
> subnets. The FreeBSD box is not a gateway.  It is merely dual homed.
>
>
>
>
Hope this helps-


# sockstat -4
root     sendmail   628   3  tcp4   127.0.0.1:25          *:*
root     sshd       609   4  tcp4   *:22                  *:*





# ifconfig -a

em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500

        options=b<RXCSUM,TXCSUM,VLAN_MTU>

        inet 150.210.240.36 netmask 0xffffff00 broadcast 150.210.240.255

        ether 00:14:22:23:1a:2e

        media: Ethernet autoselect (1000baseTX <full-duplex>)

        status: active

em1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500

        options=b<RXCSUM,TXCSUM,VLAN_MTU>

        inet 150.210.160.243 netmask 0xffffff00 broadcast 150.210.160.255

        ether 00:14:22:23:1a:2f

        media: Ethernet autoselect (1000baseTX <full-duplex>)

        status: active

lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384

        inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3

        inet6 ::1 prefixlen 128

        inet 127.0.0.1 netmask 0xff000000

       

       

# arp -an

? (150.210.160.204) at 00:00:5e:00:01:04 on em1 [ethernet]

? (150.210.160.214) at 00:0b:db:90:73:1f on em1 [ethernet]

? (150.210.160.227) at 00:11:43:ef:ba:36 on em1 [ethernet]

? (150.210.160.254) at 00:00:0c:07:ac:04 on em1 [ethernet]

? (150.210.240.32) at 00:0c:29:62:78:63 on em0 [ethernet]

? (150.210.240.39) at 00:0c:29:f8:e7:2c on em0 [ethernet]

? (150.210.240.55) at 00:1a:64:24:ce:bc on em0 [ethernet]





# netstat -rn -f inet

Routing tables



Internet:

Destination        Gateway            Flags    Refs      Use  Netif Expire

default            150.210.160.254    UGS         0      415    em1

127.0.0.1          127.0.0.1          UH          0        0    lo0

150.210.160/24     link#2             UC          0        0    em1

150.210.160.204    00:00:5e:00:01:04  UHLW        1       18    em1    552

150.210.160.214    00:0b:db:90:73:1f  UHLW        1        5    em1    654

150.210.160.227    00:11:43:ef:ba:36  UHLW        1        3    em1    747

150.210.160.254    00:00:0c:07:ac:04  UHLW        2        0    em1    547

150.210.240/24     link#1             UC          0        0    em0

150.210.240.32     00:0c:29:62:78:63  UHLW        1        6    em0    547

150.210.240.39     00:0c:29:f8:e7:2c  UHLW        1       12    em0    547

150.210.240.55     00:1a:64:24:ce:bc  UHLW        1        8    em0    743