topic Re: DHCP with ISP router don't work :/ in Next-Generation Firewall Discussions

DHCP with ISP router don't work :/

Ertu57 — Mon, 02 Dec 2024 16:32:14 GMT

Hi,

just purchased a PA-3260 and trying to configure it to use DHCP with my ISP router.

The DHCP server works fine on the ISP router, tried it on my laptop.

I reset the PA-3260 than i removed the wired interface and select the first interface and set ip up as DHCP client with default router and untrust zone.

The zones are in Layer3 mode.

But it stucks on selecting state...

I tested it with another ISP modem, many others interfaces, others cable even fiber one.

Policys are the default one, even with a policy allowing dhcp on untrust zone doesn't work.

When i set it in static, there is no connectivity between the PA and ISP modem

Any help wil be greatly appreciated

Thanks

Re: DHCP with ISP router don't work :/

reaper — Tue, 03 Dec 2024 12:55:38 GMT

Have you tried release/renew (have you tried turning it off and on again, sorry have to ask)

Are you connecting the ISP router directly to the interface or via a switch?

- Could it be the ISP connection requires a VLAN tag to work?

- if you're not using a switch, can you try using a switch (in case the link speed is somehow not able to sync up)

- have you tried manually setting the link speed/duplex?

Have you tried setting up a pcap on the eth1/1 interface to see if it is sending/receiving DHCP packets ?

Re: DHCP with ISP router don't work :/

Ertu57 — Wed, 04 Dec 2024 09:00:58 GMT

Hi,

Thanks for your reply.

- when i connect my laptop on the ISP modem, i got a ip, then i think there is no vlan tag.

- I already try with a switch and exact same trouble

- tried this too, no luck

Even in static IP mode i can't get anything, no ping, no traceroute, nothing.

If i issue the command show counter global, i have no error at all

I'am realy lost.

I have configured 2 zones, LAN and WAN on Layer3

One new Virtual router VR1

Only default Policy applied, Intrazone and deny all

PING set to Management profile under interface option

I follow step by step the intial configuration from Palo Alto guide and can't get it working 😕

Re: DHCP with ISP router don't work :/

Ertu57 — Wed, 04 Dec 2024 09:06:05 GMT

If i release and renew the ip on the interface i'am stuck at INIT on release and then it stucks on SELECTING on renew

New zones

New virtual router

No policy added

all layer 3

Tested on RJ45 and fiber gbics.

DHCP only works on Management interface

What else can it try ?

Re: DHCP with ISP router don't work :/

CosminM — Wed, 04 Dec 2024 09:25:22 GMT

Hi,

Maybe your ISP have configure the DHCP server not to release IP addresses for devices that are not sending also the hostname.

Windows clients will always send the hostname as part of the DHCP request.

Enable Send Hostname on your ethernet1/1 and try after.

Re: DHCP with ISP router don't work :/

Ertu57 — Wed, 04 Dec 2024 09:39:49 GMT

Just try with hostname and no luck still stuck on WAN and LAN side with DHCP and STATIC IP

Re: DHCP with ISP router don't work :/

Ertu57 — Wed, 04 Dec 2024 09:49:41 GMT

Here is my config

Re: DHCP with ISP router don't work :/

Ertu57 — Wed, 04 Dec 2024 11:01:28 GMT

If i set staic ip on LAN and WAN interfaces i can ping from lan the wan interface without any issue but still not my isp router at 192.168.1.1

Re: DHCP with ISP router don't work :/

CosminM — Wed, 04 Dec 2024 12:11:28 GMT

Hi,

You can check DHCP log file pan_dhcpd.log to see if there are any errors.

The CLI command is:

less mp-log pan_dhcpd.log

tail follow yes mp-log pan_dhcpd.log     ----> for real-time logs

For more DHCP troubleshooting info, please look here:

Re: DHCP with ISP router don't work :/

Ertu57 — Wed, 04 Dec 2024 12:24:57 GMT

So many errors 😞

Here is the log

Re: DHCP with ISP router don't work :/

Ertu57 — Wed, 04 Dec 2024 12:32:32 GMT

In real time for interface 1/3 to ISP modem

admin@PA3260-40G> tail follow yes mp-log pan_dhcpd.log
2024-12-04 02:44:51.145 -0800 Uninstalling old config...
2024-12-04 02:44:51.145 -0800 Installing new config
2024-12-04 02:44:51.145 -0800 Old config will be destructed after 1 seconds.
2024-12-04 02:44:51.145 -0800 Triggering CFG_INSTALL to worker thread in phase2
2024-12-04 02:44:51.145 -0800 Completed phase2 ---2---
2024-12-04 02:44:51.439 -0800 DHCP client triggered release on interface:ethernet1/19
2024-12-04 02:44:51.439 -0800 DHCP client cleared IP on interface: ethernet1/19
2024-12-04 02:44:51.439 -0800 DHCP client triggered release on interface:ethernet1/3
2024-12-04 02:44:51.439 -0800 DHCP client cleared IP on interface: ethernet1/3
2024-12-04 02:44:52.420 -0800 Delay Over. Destruct Old Config ...
2024-12-04 04:16:51.049 -0800 Triggered phase1 ---1---
2024-12-04 04:16:51.050 -0800 auto_mac_detect not configured, set to false, auto_mac_detect=0
2024-12-04 04:16:51.050 -0800 b_auto_mac_detect is set to 0
2024-12-04 04:16:51.050 -0800 auto-mac-detect is not forced, get configured value
2024-12-04 04:16:51.050 -0800 auto-mac-detect is disabled
2024-12-04 04:16:51.050 -0800 Completed phase1 ---1---
2024-12-04 04:17:03.374 -0800 sw.routed.runtime.interface.ethernet1/3 settings changed (update)
2024-12-04 04:17:03.374 -0800 Dhcpd received update for interface:ethernet1/3, if_index:66
2024-12-04 04:17:03.375 -0800 Error: pan_dhcpd_dyn_ip_if_cb(pan_dhcpd_sysd.c:1120): Error updating server interfaces with dyn info
2024-12-04 04:17:03.382 -0800 Triggered phase2 ---2---
2024-12-04 04:17:03.383 -0800 Installing new config
2024-12-04 04:17:03.383 -0800 Triggering CFG_INSTALL to worker thread in phase2
2024-12-04 04:17:03.383 -0800 Completed phase2 ---2---
2024-12-04 04:17:35.405 -0800 DHCP client triggered renew on interface:ethernet1/3
2024-12-04 04:19:18.405 -0800 DHCP client triggered renew on interface:ethernet1/3
admin@PA3260-40G> tail follow yes mp-log pan_dhcpd.logadmin@PA3260-40G> tail follow yes mp-log pan_dhcpd.log
2024-12-04 04:17:03.383 -0800 Triggering CFG_INSTALL to worker thread in phase2
2024-12-04 04:17:03.383 -0800 Completed phase2 ---2---
2024-12-04 04:17:35.405 -0800 DHCP client triggered renew on interface:ethernet1/3
2024-12-04 04:19:18.405 -0800 DHCP client triggered renew on interface:ethernet1/3

Re: DHCP with ISP router don't work :/

Ertu57 — Wed, 04 Dec 2024 12:34:06 GMT

Do i have a faulty unit ?

2024-12-03 06:54:32.554 -0800 Warning: pan_dhcpd_setup_dp_conn(pan_dhcp_client_thread.c:172): Failed to connect to DP <----
2024-12-03 06:54:37.554 -0800 Error: pan_dhcpd_setup_socket(pan_dhcpd.c:707): bind failed:(errno: 99) Cannot assign requested address

Re: DHCP with ISP router don't work :/

Ertu57 — Wed, 04 Dec 2024 12:56:38 GMT

Here is the PCAP, the mac 34:e5:ec:a8:69:42 is the interface for the WAN side :

admin@PA3260-40G> debug dhcpd pcap on

admin@PA3260-40G> debug dhcpd pcap off

sw.pancap.feature-dhcp.vr-0.off:

admin@PA3260-40G> debug dhcpd pcap view

04:37:18.389617 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 34:e5:ec:a8:69:42, length 300
04:37:22.389862 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 34:e5:ec:a8:69:42, length 300
04:37:30.390045 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 34:e5:ec:a8:69:42, length 300
04:37:41.312506 IP 10.1.0.222.68 > 255.255.255.255.67: BOOTP/DHCP, Request from bc:24:11:0d:84:3c, length 244
04:37:41.312996 IP 10.1.0.220.67 > 255.255.255.255.68: BOOTP/DHCP, Reply, length 300
04:37:46.390271 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 34:e5:ec:a8:69:42, length 300
04:42:18.393195 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 34:e5:ec:a8:69:42, length 300
04:42:22.393362 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 34:e5:ec:a8:69:42, length 300
04:42:29.376062 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 34:e5:ec:a8:69:42, length 300
04:42:33.376283 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 34:e5:ec:a8:69:42, length 300
04:42:41.376453 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 34:e5:ec:a8:69:42, length 300
04:42:42.376073 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 34:e5:ec:a8:69:42, length 300
04:42:44.725353 IP 10.1.0.222.68 > 255.255.255.255.67: BOOTP/DHCP, Request from bc:24:11:0d:84:3c, length 244
04:42:44.726135 IP 10.1.0.220.67 > 255.255.255.255.68: BOOTP/DHCP, Reply, length 300
04:42:47.376149 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 34:e5:ec:a8:69:42, length 300
04:42:51.376315 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 34:e5:ec:a8:69:42, length 300

Re: DHCP with ISP router don't work :/

Ashish_Kushwaha — Wed, 04 Dec 2024 13:15:12 GMT

Assign a temp static IP on WAN interface same DHCP IP Series and verify connectivity and check it is working or not.

Re: DHCP with ISP router don't work :/

Ertu57 — Wed, 04 Dec 2024 13:35:25 GMT

Assigned a temp IP on WAN side 192.168.1.11/24

I can ping from LAN Interface 1/19 to WAN interface 1/3 but nothing else

I dont have connectivity after the PA-3260, can't ping the LAN side either my ISP modem

Re: DHCP with ISP router don't work :/

Ertu57 — Wed, 04 Dec 2024 13:45:28 GMT

Nothing get out from the PA-3260 😕

Re: DHCP with ISP router don't work :/

M.Schapdick — Wed, 04 Dec 2024 14:41:40 GMT

Have you tried restarting the ISP modem?

Sometimes those modems register the first MAC address they see and it needs a restart/reset to connect to another one. Easy way to rule out it's that is by connecting another laptop and check if it also gets an IP address.

If the second laptop gets an IP address successfully, I would go this way in troubleshooting:

Since the unit doesn't seem to be in production yet: reboot firewall (+ ISP modem) and try with a temporary any/any security policy first.
make sure there is no NAT policy affecting this traffic
Check if it's a relatively recent PAN-OS version to rule out existing bugs
check forwarding table (should be correct if locally connected)
traffic capture WAN interface and check if you see something weird for DHCP when you physically connect the cable
call TAC

Re: DHCP with ISP router don't work :/

Ertu57 — Wed, 04 Dec 2024 15:20:43 GMT

Since the unit doesn't seem to be in production yet: reboot firewall (+ ISP modem) and try with a temporary any/any security policy first.
---> Tried it and excat same issue
make sure there is no NAT policy affecting this traffic
--> NO NAT Rule
Check if it's a relatively recent PAN-OS version to rule out existing bugs
--> PAN-OS v10.1.5-h1
check forwarding table (should be correct if locally connected)
--> Where do i check this one ? Do you mean routing table on the virual router ?
traffic capture WAN interface and check if you see something weird for DHCP when you physically connect the cable
--> Already done and here are the results (attached file)
call TAC
--> Don't speak English very well to have a full conversation with tech

Re: DHCP with ISP router don't work :/

Ertu57 — Wed, 04 Dec 2024 16:15:48 GMT

I would like to create an account to upgrade this device but it ask me a SCP ID i do not have.

Can we create an account with a second hand product from Palo Alto ?

Re: DHCP with ISP router don't work :/

CosminM — Wed, 04 Dec 2024 17:42:50 GMT

Without a valid support subscription you cannot make any upgrades.

Unfortunately, for your end-of-sale model (PA-3200 series) you will not be able to obtain a valid support subscription.

Secondary Market Policy

Hardware End-of-Life Dates