pfSense sends packet as 0.0.0.0

[johnpoz]

so when you remove that rule, it doesn't work anymore? Or maybe unbound just had an issue? If you can not resolve.. Did you see dns traffic going out with all zeros as source?

[jimp]

1. You should never have an outbound NAT rule with a source of any -- fix that before anything else. You are in hybrid mode so it's unnecessary anyhow.
2. Let's see the pcap, or a screenshot of it loaded in wireshark
3. What shows up in Diagnostics > States for the traffic that is sourced as 0.0.0.0?

The last time this happened there was something unusual on the user's setup, though I can't remember what it was. I want to say maybe it was an IPv6-only IPsec VTI instance but I'm probably misremembering.

[Topogigio]

@johnpoz If I remove that rule, it does not work anymore. If I remove that rule I see traffic (ICMP request for example) from pfSense with 0.0.0.0 as source. Only traffic from pfSense itself, not traffic from other hosts routed through it.

[Topogigio]

@jimp

• I know it. I added it as workaround, without that pfSense is unable to contact the world to resolve DNS or download updates.
• sorry, a pcap from where? I have access to pfSense and nothing else on the external side.

From the pfSense:

PING 8.8.8.8 (8.8.8.8): 56 data bytes

--- 8.8.8.8 ping statistics ---
3 packets transmitted, 0 packets received, 100.0% packet loss

---

15:37:32.819751 IP 0.0.0.0 > 8.8.8.8: ICMP echo request, id 32851, seq 0, length 64
15:37:33.830224 IP 0.0.0.0 > 8.8.8.8: ICMP echo request, id 32851, seq 1, length 64
15:37:34.840837 IP 0.0.0.0 > 8.8.8.8: ICMP echo request, id 32851, seq 2, length 64

states: I cannot find anything related to 8.8.8.8

---

I have IPSEC VTI interfaces, but I'm sure that the problem has started AFTER I configured them (because I required OSPF so I installed the package after the VPNs were connected. However can be something there, I agree. But I cannot understand why and what..

[stephenw10]

No states shown for 0.0.0.0 either?

[Topogigio]

@stephenw10 sorry, found:

WAN icmp 0.0.0.0:25462 -> 8.8.8.8:25462 0:0 3 / 0 252 B / 0 B

[jimp]

Show the entire output of ifconfig -a and netstat -rn.

Something is broken in your setup and it's not NAT. The NAT is hiding the real issue.

[Topogigio]

@jimp Routing tables

Internet:
Destination Gateway Flags Netif Expire
default X.X.X.254 UGS hn0
10.0.0.0/24 10.77.36.1 UG1 ipsec100
10.0.1.0/24 10.77.36.1 UG1 ipsec100
10.0.2.0/24 10.77.36.1 UG1 ipsec100
10.20.0.0/22 10.77.36.1 UG1 ipsec100
10.40.0.0/25 10.77.36.1 UG1 ipsec100
10.40.0.0/24 10.77.36.1 UG1 ipsec100
10.40.0.128/25 10.77.36.1 UG1 ipsec100
10.77.32.0/26 link#6 U hn1
10.77.32.1 link#6 UHS lo0
10.77.32.64/26 link#7 U hn2
10.77.32.65 link#7 UHS lo0
10.77.36.1 link#8 UH ipsec100
10.77.36.2 link#8 UHS lo0
10.77.36.5 link#9 UH ipsec200
10.77.36.6 link#9 UHS lo0
X.X.X.104 link#5 UHS lo0
X.X.X.104/32 link#5 U hn0
X.X.X.105 link#5 UHS lo0
X.X.X.105/32 link#5 U hn0
X.X.X.106 link#5 UHS lo0
X.X.X.106/32 link#5 U hn0
X.X.X.40/30 10.77.36.1 UG1 ipsec100
X.X.X.84/30 10.77.36.1 UG1 ipsec100
X.X.X.246 X.X.X.254 UGHS hn0
X.X.X.38 X.X.X.254 UGHS hn0
127.0.0.1 link#1 UH lo0
X.X.X.254 02:00:00:5f:28:ad UHS hn0
172.16.0.0/22 10.77.36.1 UG1 ipsec100
172.19.0.0/16 10.77.36.1 UG1 ipsec100
172.19.16.64/26 10.77.36.1 UG1 ipsec100
172.19.32.0/20 10.77.36.1 UG1 ipsec100
172.26.0.0/16 10.77.36.1 UG1 ipsec100
172.27.0.0/16 10.77.36.1 UG1 ipsec100
172.27.64.0/19 10.77.36.1 UG1 ipsec100
172.29.0.0/16 10.77.36.1 UG1 ipsec100
172.30.94.0/26 10.77.36.1 UG1 ipsec100
172.30.94.64/26 10.77.36.1 UG1 ipsec100
172.30.94.128/26 10.77.36.1 UG1 ipsec100
172.30.96.0/24 10.77.36.1 UG1 ipsec100
172.30.98.0/24 10.77.36.1 UGS ipsec100
172.30.99.0/24 10.77.36.1 UG1 ipsec100
172.30.252.0/24 10.77.36.1 UG1 ipsec100
172.30.254.1/32 10.77.36.1 UG1 ipsec100
172.30.254.2/32 10.77.36.1 UG1 ipsec100
172.30.254.11/32 10.77.36.1 UG1 ipsec100
172.30.254.12/32 10.77.36.1 UG1 ipsec100
172.30.254.13/32 10.77.36.1 UG1 ipsec100
172.30.254.14/32 10.77.36.1 UG1 ipsec100
172.30.254.15/32 10.77.36.1 UG1 ipsec100
172.30.254.16/32 10.77.36.1 UG1 ipsec100
172.30.254.28/32 10.77.36.1 UG1 ipsec100
172.30.254.29/32 10.77.36.1 UG1 ipsec100
172.30.254.34/32 10.77.36.1 UG1 ipsec100
172.30.254.35/32 10.77.36.1 UG1 ipsec100
172.30.254.46/32 10.77.36.1 UG1 ipsec100
172.30.254.47/32 10.77.36.1 UG1 ipsec100
172.30.254.53/32 10.77.36.1 UG1 ipsec100
172.30.254.54/32 10.77.36.1 UG1 ipsec100
172.30.254.55/32 10.77.36.1 UG1 ipsec100
172.30.254.56/32 10.77.36.1 UG1 ipsec100
172.30.254.59/32 10.77.36.1 UG1 ipsec100
172.30.254.60/32 10.77.36.1 UG1 ipsec100
172.30.254.63/32 10.77.36.1 UG1 ipsec100
172.30.254.64/32 10.77.36.1 UG1 ipsec100
172.30.254.71/32 10.77.36.1 UG1 ipsec100
172.30.254.72/32 10.77.36.1 UG1 ipsec100
172.30.254.73/32 10.77.36.1 UG1 ipsec100
172.30.254.74/32 10.77.36.1 UG1 ipsec100
172.30.254.76/30 10.77.36.1 UG1 ipsec100
172.30.254.80/30 10.77.36.1 UG1 ipsec100
172.160.10.0/24 10.77.36.1 UG1 ipsec100
192.168.0.0/24 10.77.36.1 UG1 ipsec100
192.168.1.0/24 10.77.36.1 UG1 ipsec100
192.168.2.0/24 10.77.36.1 UG1 ipsec100
192.168.19.0/24 10.77.36.1 UG1 ipsec100
192.168.21.0/24 10.77.36.1 UG1 ipsec100
192.168.22.0/24 10.77.36.1 UG1 ipsec100
192.168.24.0/24 10.77.36.1 UG1 ipsec100
192.168.29.0/24 10.77.36.1 UG1 ipsec100
192.168.32.0/24 10.77.36.1 UG1 ipsec100
192.168.33.0/24 10.77.36.1 UG1 ipsec100
192.168.34.0/24 10.77.36.1 UG1 ipsec100
192.168.41.0/24 10.77.36.1 UG1 ipsec100
192.168.47.0/24 10.77.36.1 UG1 ipsec100
192.168.51.0/24 10.77.36.1 UG1 ipsec100
192.168.52.0/24 10.77.36.1 UG1 ipsec100
192.168.96.0/24 10.77.36.1 UG1 ipsec100
192.168.97.0/26 10.77.36.1 UG1 ipsec100
192.168.97.64/26 10.77.36.1 UG1 ipsec100
192.168.100.0/24 10.77.36.1 UG1 ipsec100
192.168.103.192/26 10.77.36.1 UG1 ipsec100
192.168.190.0/24 10.77.36.1 UG1 ipsec100
195.43.163.9/32 10.77.36.1 UG1 ipsec100
195.43.178.150/32 10.77.36.1 UG1 ipsec100

Internet6:
Destination Gateway Flags Netif Expire
::1 link#1 UH lo0
fe80::%lo0/64 link#1 U lo0
fe80::1%lo0 link#1 UHS lo0
fe80::%hn0/64 link#5 U hn0
fe80::ff:fe5f:28ad%hn0 link#5 UHS lo0
fe80::%hn1/64 link#6 U hn1
fe80::215:5dff:fe5a:1601%hn1 link#6 UHS lo0
fe80::%hn2/64 link#7 U hn2
fe80::215:5dff:fe5a:1602%hn2 link#7 UHS lo0
fe80::%ipsec1000/64 link#8 U ipsec100
fe80::215:5dff:fe5a:1601%ipsec1000 link#8 UHS lo0
fe80::%ipsec2000/64 link#9 U ipsec200
fe80::215:5dff:fe5a:1601%ipsec2000 link#9 UHS lo0

Shell Output - ifconfig -a

lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
options=680003<RXCSUM,TXCSUM,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6>
inet6 ::1 prefixlen 128
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
inet 127.0.0.1 netmask 0xff000000
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
groups: lo
enc0: flags=41<UP,RUNNING> metric 0 mtu 1536
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
groups: enc
pfsync0: flags=0<> metric 0 mtu 1500
groups: pfsync
pflog0: flags=100<PROMISC> metric 0 mtu 33160
groups: pflog
hn0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=48001b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,LINKSTATE,TXCSUM_IPV6>
ether 02:00:00:5f:28:ad
hwaddr 02:00:00:5f:28:ad
inet6 fe80::ff:fe5f:28ad%hn0 prefixlen 64 scopeid 0x5
inet X.X.X.104 netmask 0xffffffff broadcast X.X.X.104
inet X.X.X.105 netmask 0xffffffff broadcast X.X.X.105
inet X.X.X.106 netmask 0xffffffff broadcast X.X.X.106
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
media: Ethernet autoselect (10Gbase-T <full-duplex>)
status: active
hn1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=48001b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,LINKSTATE,TXCSUM_IPV6>
ether 00:15:5d:5a:16:01
hwaddr 00:15:5d:5a:16:01
inet6 fe80::215:5dff:fe5a:1601%hn1 prefixlen 64 scopeid 0x6
inet 10.77.32.1 netmask 0xffffffc0 broadcast 10.77.32.63
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
media: Ethernet autoselect (10Gbase-T <full-duplex>)
status: active
hn2: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=48001b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,LINKSTATE,TXCSUM_IPV6>
ether 00:15:5d:5a:16:02
hwaddr 00:15:5d:5a:16:02
inet6 fe80::215:5dff:fe5a:1602%hn2 prefixlen 64 scopeid 0x7
inet 10.77.32.65 netmask 0xffffffc0 broadcast 10.77.32.127
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
media: Ethernet autoselect (10Gbase-T <full-duplex>)
status: active
ipsec1000: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> metric 0 mtu 1422
tunnel inet X.X.X.104 --> X.X.X.246
inet6 fe80::215:5dff:fe5a:1601%ipsec1000 prefixlen 64 scopeid 0x8
inet 10.77.36.2 --> 10.77.36.1 netmask 0xfffffffc
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
reqid: 1000
groups: ipsec
ipsec2000: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> metric 0 mtu 1438
tunnel inet X.X.X.104 --> X.X.X.38
inet6 fe80::215:5dff:fe5a:1601%ipsec2000 prefixlen 64 scopeid 0x9
inet 10.77.36.6 --> 10.77.36.5 netmask 0xfffffffc
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
reqid: 2000
groups: ipsec

[Ziomalski]

Were you able to resolve the issue? I ask because I have a similar problem but specific to a VPN VTI. At my home, I setup an IPsec VTI connection to a fresh EdgeRouter. My Local/Remote subnet is 192.168.51.1/30. However, I noticed the P2 negotiates 0.0.0.0/0 for local/remote.

With Static routes setup, my PC can ping the router and connect to anything on the internet. Exactly as I want and expect. However, pfSense cannot ping. Packet capture shows exactly what you have as 0.0.0.0 source and therefor fails.

This wouldn't be a huge problem except that Gateway-Monitor is broken because it can't ping. Now I realize that without GW-Mon, Firewall rules that have a specified GW get skipped. Even when GW-Mon option is disabled and is supposed to be treated as "always online".

[jimp]

@Ziomalski said in pfSense sends packet as 0.0.0.0:

I noticed the P2 negotiates 0.0.0.0/0 for local/remote.

That is normal for VTI and not related to this isssue.