Try lowering the MTU or disabling PMTU discovery. I have never seen PMTU discovery work on FreeBSD. I always use a lower MTU when going over a WAN.<br><br><div class="gmail_quote">On Dec 20, 2007 4:24 PM, Rodrique Heron <
<a href="mailto:swygue@gmail.com">swygue@gmail.com</a>> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="Ih2E3d"><br>
<br>Dan Langille wrote:<br>> ... I think I misunderstood you in my original reply.<br>><br>> Rodrique Heron wrote:<br>>> Hello all-<br>>><br>>> Are there any known issues when FreeBSD is dual homed.
<br>><br>> There may be issues, but I have run dual homed FreeBSD since 1998.<br>><br>><br>>> I have two interfaces, each connected to a different subnet. Whenever<br>>> both are enabled I can't get any incoming network traffic to the server.
<br>><br>> Can you elaborate upon this? It's not clear what you are trying to do.<br>><br>> So one NIC fails to work? No traffic in or out? Both nics?<br>><br>> Output of netstat -na would help us understand.
<br>><br>> > I'm not<br>>> routing between the two, therefore no "gateway_enable" in rc.conf. I<br>>> don't have any firewalls enabled, I do have my defaultrouter set.<br>><br>> I originally said:
<br>> AFAIK, you cannot route between the two UNLESS you have<br>> gateway_enable="YES" in /etc/rc.conf.<br>><br>> But what you mean is that you do not wish to route between the two<br>> subnets. The FreeBSD box is not a gateway. It is merely dual homed.
<br>><br>><br>><br>><br></div>Hope this helps-<br><br><br># sockstat -4<br>root sendmail 628 3 tcp4 <a href="http://127.0.0.1:25" target="_blank">127.0.0.1:25</a> *:*<br>root sshd 609 4 tcp4 *:22 *:*
<br><br><br><br><br><br># ifconfig -a<br><br>em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500<br><br> options=b<RXCSUM,TXCSUM,VLAN_MTU><br><br> inet <a href="http://150.210.240.36" target="_blank">
150.210.240.36</a> netmask 0xffffff00 broadcast <a href="http://150.210.240.255" target="_blank">150.210.240.255</a><br><br> ether 00:14:22:23:1a:2e<br><br> media: Ethernet autoselect (1000baseTX <full-duplex>)
<br><br> status: active<br><br>em1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500<br><br> options=b<RXCSUM,TXCSUM,VLAN_MTU><br><br> inet <a href="http://150.210.160.243" target="_blank">
150.210.160.243</a> netmask 0xffffff00 broadcast <a href="http://150.210.160.255" target="_blank">150.210.160.255</a><br><br> ether 00:14:22:23:1a:2f<br><br> media: Ethernet autoselect (1000baseTX <full-duplex>)
<br><br> status: active<br><br>lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384<br><br> inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3<br><br> inet6 ::1 prefixlen 128<br><br> inet <a href="http://127.0.0.1" target="_blank">
127.0.0.1</a> netmask 0xff000000<br><br><br><br><br><br># arp -an<br><br>? (<a href="http://150.210.160.204" target="_blank">150.210.160.204</a>) at 00:00:5e:00:01:04 on em1 [ethernet]<br><br>? (<a href="http://150.210.160.214" target="_blank">
150.210.160.214</a>) at 00:0b:db:90:73:1f on em1 [ethernet]<br><br>? (<a href="http://150.210.160.227" target="_blank">150.210.160.227</a>) at 00:11:43:ef:ba:36 on em1 [ethernet]<br><br>? (<a href="http://150.210.160.254" target="_blank">
150.210.160.254</a>) at 00:00:0c:07:ac:04 on em1 [ethernet]<br><br>? (<a href="http://150.210.240.32" target="_blank">150.210.240.32</a>) at 00:0c:29:62:78:63 on em0 [ethernet]<br><br>? (<a href="http://150.210.240.39" target="_blank">
150.210.240.39</a>) at 00:0c:29:f8:e7:2c on em0 [ethernet]<br><br>? (<a href="http://150.210.240.55" target="_blank">150.210.240.55</a>) at 00:1a:64:24:ce:bc on em0 [ethernet]<br><br><br><br><br><br># netstat -rn -f inet<br>
<br>Routing tables<br><br><br><br>Internet:<br><br>Destination Gateway Flags Refs Use Netif Expire<br><br>default <a href="http://150.210.160.254" target="_blank">150.210.160.254</a> UGS 0 415 em1
<br><br><a href="http://127.0.0.1" target="_blank">127.0.0.1</a> <a href="http://127.0.0.1" target="_blank">127.0.0.1</a> UH 0 0 lo0<br><br>150.210.160/24 link#2 UC 0 0 em1
<br><br><a href="http://150.210.160.204" target="_blank">150.210.160.204</a> 00:00:5e:00:01:04 UHLW 1 18 em1 552<br><br><a href="http://150.210.160.214" target="_blank">150.210.160.214</a> 00:0b:db:90:73:1f UHLW 1 5 em1 654
<br><br><a href="http://150.210.160.227" target="_blank">150.210.160.227</a> 00:11:43:ef:ba:36 UHLW 1 3 em1 747<br><br><a href="http://150.210.160.254" target="_blank">150.210.160.254</a> 00:00:0c:07:ac:04 UHLW 2 0 em1 547
<br><br>150.210.240/24 link#1 UC 0 0 em0<br><br><a href="http://150.210.240.32" target="_blank">150.210.240.32</a> 00:0c:29:62:78:63 UHLW 1 6 em0 547<br><br><a href="http://150.210.240.39" target="_blank">
150.210.240.39</a> 00:0c:29:f8:e7:2c UHLW 1 12 em0 547<br><br><a href="http://150.210.240.55" target="_blank">150.210.240.55</a> 00:1a:64:24:ce:bc UHLW 1 8 em0 743<br><div>
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