Can’t get WAN IP from FiOS

luckman212

post output of

ifconfig

go simpler… try

tcpdump -i re0
tcpdump -i re1
tcpdump -i re2

make sure you are capturing on the right interface … you should see packets flying by

DominikHoffmann

@luckman212:

Ok if you already did that, then yeah - tcpdump/Wireshark is your next move.

Here's a starting point-

1. pull out the cat5 cable from your FIOS ONT

2. ssh to your pfsense, go to opt 8 and run the following:

tcpdump -i <wan_interface_name>-w dhcplog.pcap -s 0 port 67 or port 68

3. plug the cable back in and wait about a minute for some packets to be captured

4. hit CTRL+C and then copy that .pcap file to your desktop computer (use scp)

5. open that pcap in Wireshark and take a look… happy hunting ;)</wan_interface_name>

@luckman212:

post output of
ifconfig
go simpler… try
tcpdump -i re0
tcpdump -i re1
tcpdump -i re2
make sure you are capturing on the right interface … you should see packets flying by

It turns out that while troubleshooting I had inadvertently changed the NIC speed to something incorrect. So, I have been able to capture DHCP packets:

It looks to me like the one shown here is either a DHCPOFFER or a DHCPACK message. The DHCP server is at 72.86.40.1 (= 0x48562801) and offers the IP address 72.86.40.140 (= 0x4856288C). I haven’t figured out, yet, which of the two it is.

luckman212

Still not enough info. Seems like pfSense is acquiring a valid WAN IP 72.86.40.140 from the ONT. You don't have anything nonstandard in your WAN DHCP config do you? Might be able to tell more if you PM me a pcap file. If you're worried about leaking any private info, just disconnect your LAN first so only traffic between pfsense <-> ONT is in the capture. Try a packet capture without any filters- need to see other traffic in addition to the BOOTP.

DominikHoffmann

Well, it turns out that that one of the NICs in my Zotac ZBOX-CI321NANO-U-W2B was bad.

I found out by swapping the WAN and LAN cables. While before the box failed to get an IP address from my ISP, after the swap it couldn’t be pinged by the LAN. After the swap the router did just fine setting up connectivity with the ISP.

I have now filed an RMA for replacement under warranty with Zotac. It had been an open-box unit purchased from Amazon for a real steal. Very possibly the previous owner had found the problem and returned it for credit without reporting the issue.

bonymattw

@luckman212 seems like you have a solid background with WAN IP issues on devices. My FiOS connection keeps dropping on the WAN interface and comes back when I reset the interface. Is there any way to solve this ?

I posted in detail here what is happening:
https://forum.netgate.com/topic/133896/wan-drops-connection-3-4-times-a-day-to-r210-ii-verizon-fios

Thank you!