Second Lan network same interface

JKnott

Just assign an interface address to the interface. It will be connected and therefore in the routing table. No gateways or static routes necessary. pfSense doesn't care if it is routable or ULA. It's just a subnet.

The LAN interface has both global and ULA addresses on it. Global addresses work fine. How do I assign a 2nd address? I created the subnet on the RA page and even created an alias on the Virtual IPs page. Ifconfig shows the virtual IP and I can ping it from the pfSense computer, but not from the desktop computer, which has both global and ULA addresses. The virtual address on the pfSense computer is fd48:1a37:2160::1 and the desktop has fd48:1a37:2160:0:61af:b555:ad10:3fd2

When I ping from pfSense to the desktop, this is what I see.
ping6 fd48:1a37:2160:0:61af:b555:ad10:3fd2
PING6(56=40+8+8 bytes) fd48:1a37:2160::1 –> fd48:1a37:2160:0:61af:b555:ad10:3fd2

There is no response from the desktop. If I have a static route configured, traceroute keeps cycling through the pfSense computer. If I don't have a static route configured, it tries to go out to the 'net.

Also, Wireshark does not show any pings, in either direction. However, the RA contains "ICMPv6 Option (Prefix information : fd48:1a37:2160::1/128)" and "ICMPv6 Option (Prefix information : fd48:1a37:2160::/64)" , so the router ULA address is being advertised.

Either I'm missing something, or ULA routing isn't working properly. As I mentioned, IPv4 RFC1918 addresses route properly.

The desktop system is running openSUSE 42.3.

JKnott

Just to update, I have 3 interfaces as follows
LAN global and ULA
VLAN3 ULA only
LAN4 global only.

From the pfSense computer or a computer on LAN4, I cannot ping the ULA on the desktop on either LAN or VLAN3. On the pfSense computer, I can ping it's own ULA on both LAN and VLAN3.

JKnott

Assigning a virtual IP on the LAN interface caused it to lose the global address. There's definitely something wrong with the way pfSense handles ULA.

Derelict

IDK, man. I just did it and it worked fine.

DHCP WAN, Track Interface LAN, ULA IP Alias VIP /64 on LAN, Added ULA /64 as a subnet for RA on LAN, firewall rule passing all traffic from ULA::/64 on LAN, booted test VM:

pfSense LAN:
re0: flags=8843 <up,broadcast,running,simplex,multicast>metric 0 mtu 1500
options=80098 <vlan_mtu,vlan_hwtagging,vlan_hwcsum,linkstate>ether fe:e0:54:6e:79:49
hwaddr fe:e0:54:6e:79:49
inet 172.25.233.1 netmask 0xffffff00 broadcast 172.25.233.255
inet6 2001:dead:beef:fd01:fce0:54ff:fe6e:7949 prefixlen 64
inet6 fe80::1:1%re0 prefixlen 64 scopeid 0x1
inet6 fd08:1e26:8fea:525b::1 prefixlen 64
nd6 options=21 <performnud,auto_linklocal>media: Ethernet autoselect (100baseTX <full-duplex>)
status: active

Test host interface:
derelict@Host-B1:~$ ifconfig
eth0 Link encap:Ethernet HWaddr 9a:b3:de:87:fa:4b
inet addr:172.25.233.100 Bcast:172.25.233.255 Mask:255.255.255.0
inet6 addr: fd08:1e26:8fea:525b:98b3:deff:fe87:fa4b/64 Scope:Global
inet6 addr: fe80::98b3:deff:fe87:fa4b/64 Scope:Link
inet6 addr: 2001:dead:beef:fd01:98b3:deff:fe87:fa4b/64 Scope:Global
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:205 errors:0 dropped:0 overruns:0 frame:0
TX packets:122 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:34081 (34.0 KB) TX bytes:15844 (15.8 KB)

To pfSense LAN VIP:
derelict@Host-B1:~$ ping6 -c 3 -I fd08:1e26:8fea:525b:98b3:deff:fe87:fa4b fd08:1e26:8fea:525b::1
PING fd08:1e26:8fea:525b::1(fd08:1e26:8fea:525b::1) from fd08:1e26:8fea:525b:98b3:deff:fe87:fa4b : 56 data bytes
64 bytes from fd08:1e26:8fea:525b::1: icmp_seq=1 ttl=64 time=0.518 ms
64 bytes from fd08:1e26:8fea:525b::1: icmp_seq=2 ttl=64 time=0.294 ms
64 bytes from fd08:1e26:8fea:525b::1: icmp_seq=3 ttl=64 time=0.684 ms

–- fd08:1e26:8fea:525b::1 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 1998ms
rtt min/avg/max/mdev = 0.294/0.498/0.684/0.161 ms

To the WAN address of upstream pfSense:
derelict@Host-B1:~$ ping6 -c 3 -I fd08:1e26:8fea:525b:98b3:deff:fe87:fa4b 2001:dead:beef:7fff::ed96:eec5
PING 2001:dead:beef:7fff::ed96:eec5(2001:dead:beef:7fff::ed96:eec5) from fd08:1e26:8fea:525b:98b3:deff:fe87:fa4b : 56 data bytes
64 bytes from 2001:dead:beef:7fff::ed96:eec5: icmp_seq=1 ttl=64 time=0.524 ms
64 bytes from 2001:dead:beef:7fff::ed96:eec5: icmp_seq=2 ttl=64 time=0.287 ms
64 bytes from 2001:dead:beef:7fff::ed96:eec5: icmp_seq=3 ttl=64 time=0.320 ms

–- 2001:dead:beef:7fff::ed96:eec5 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 0.287/0.377/0.524/0.104 ms

I don't have routing for that ULA from anything else.

Note this is a recent 2.4-RC since that's what my test environment is currently running.</full-duplex></performnud,auto_linklocal></vlan_mtu,vlan_hwtagging,vlan_hwcsum,linkstate></up,broadcast,running,simplex,multicast>

Derelict

And with NPt to an unused /64 on pfSense WAN:
derelict@Host-B1:~$ ping6 -n -c 3 -I fd08:1e26:8fea:525b:98b3:deff:fe87:fa4b www.google.com
PING www.google.com(2607:f8b0:400e:c05::63) from fd08:1e26:8fea:525b:98b3:deff:fe87:fa4b : 56 data bytes
64 bytes from 2607:f8b0:400e:c05::63: icmp_seq=1 ttl=46 time=59.6 ms
64 bytes from 2607:f8b0:400e:c05::63: icmp_seq=2 ttl=46 time=83.8 ms
64 bytes from 2607:f8b0:400e:c05::63: icmp_seq=3 ttl=46 time=58.7 ms

–- www.google.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 58.704/67.398/83.847/11.640 ms

JKnott

I'll have to go through the stuff you provided, howerver I made some changes and did some more testing. At the moment, the configuration is as follows:

LAN global & ULA
LAN4 ULA only
VLAN3 ULA only

The desktop computer has both LAN and VLAN3 configured and the notebook is on LAN4 only.

If I ping the laptop by forcing ping over VLAN3, it works. However, when via LAN, no response. Wireshark on the notebook shows both request and reply, but on the desktop, only the request. From the pfSense computer, I can ping the notebook and the VLAN3 address of the desktop, but not the LAN address. Wireshark does not show any ping requests from pfSense to the LAN interface So, there is still something about the LAN interface that's causing problems.

I see you have a ULA address fd08:1e26:8fea:525b::1 on the LAN interface. How did you put it there? I do not have one. I used a virtual IP last night, but this morning, the virtual IP was there, but the global address was gone.

The network ULA addresses are as follows:
LAN fd48:1a37:2160:0::
VLAN3 fd48:1a37:2160:3::
LAN4 fd48:1a37:2160:4::

Netstat -r on pfSense shows:

fd48:1a37:2160:3:: link#8 U bge0_vla
fd48:1a37:2160:3:: link#8 UHS lo0
fd48:1a37:2160:4:: link#2 U em0
fd48:1a37:2160:4:: link#2 UHS lo0

Note there is no line for fd48:1a37:2160:0::.

There is also this on the WAN interface:

fd07:f798:3:16e:: link#3 U re0
fd07:f798:3:4172:: link#3 U re0

There are no other ULA addresses listed. So, pfSense doesn't have a route to fd48:1a37:2160:0::.

JKnott

I think I found it. I had to set the VIP prefix to /64. Also, curious that the pfSense graphical admin doesn't show the 2nd address on either the dashboard or interface status. Netstat -r does though.

johnpoz

"I had to set the VIP prefix to /64"

what else would you have set it too?

JKnott

The default is /128, so if you forget to change it…

Now I can add gazillions of security cameras to that network! ;)

JKnott

I just tried pinging ipv6.google.com from a computer with a ULA and I see the requests heading out of the WAN port. I guess I should create a rule to block ULA addresses.

Derelict

Yup. Just like RFC1918.

JKnott

I just created a floating rule to block fc::/7 in both directions, but the pings are still leaving the firewall.

Screenshot_20170908_163212.png_thumb

Derelict

Did you kill the existing states?

Or at least stop and restart the ping?

Derelict

You should also check quick there.

JKnott

I did try it and it didn't make any difference. I'm using Wireshark, to monitor the cable from the firewall to cable modem. I just set it again and it's still not blocking.

JKnott

Well, that virtual IP killed my network again. I had to remove it for things to work properly.

Derelict

IDK again, man. Works here…

Packet capture on WAN for fc00::/7 shows nothing as well.

![Screen Shot 2017-09-08 at 3.21.53 PM.png](/public/imported_attachments/1/Screen Shot 2017-09-08 at 3.21.53 PM.png)
![Screen Shot 2017-09-08 at 3.21.53 PM.png_thumb](/public/imported_attachments/1/Screen Shot 2017-09-08 at 3.21.53 PM.png_thumb)

JKnott

I have absolutely no idea what's causing these problems. I'm running the latest version on a refurb computer.

Derelict

Everything I am doing is 2.4-RC on a XenServer VM. I have no reason to believe 2.3.4_1 on a physical would be any different.