NGFW PA820 9.1.4 Strange NAT issue

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NGFW PA820 9.1.4 Strange NAT issue

L1 Bithead

We have a simple basic setup:

WAN1/1 Untrust IP 123.45.67.89/29

LAN1/2 Trust IP 10.9.8.1/16

We NAT our WAN interface out to a different IP in the same network. 123.45.67.90

NAT POL  Trust to Untrust Int1/1 Any Any to 123.45.67.90  

Security Pol is Any Any 

I ping 8.8.8.8 from the LAN1/1 and it NATs out correctly with the .90 address

Devices behind the firewall are not getting NAT'd out, I have pcap that shows this.  The pcap does not show the NAT'd IP just the trust traffic from the device to the LAN1/1 on both outbound and inbound traffic.

 

 I can also ping the ISP GW from the downstream devices so I can get traffic beyond the FW but nothing beyond that.

 

8 REPLIES 8

L1 Bithead

ame: ethernet1/1, ID: 16
Operation mode: layer3
Virtual router VR-1
Interface MTU 1500
Interface IP address: 170.150.13.147/29
Interface management profile: no
Service configured: IKE
Zone: Untrust-ISP1, virtual system: vsys1
Adjust TCP MSS: no
Policing: no

Cyber Elite
Cyber Elite

everything looks ok...

 

if you start a ping out to the internet, can you check if the session ID of your outgoing ping to see which rules it hits etc:

 

show session all filter destination 1.1.1.1 application ping

show session id xxx

Tom Piens
PANgurus - SASE and Strata specialist; (co)managed services, VAR and consultancy

L1 Bithead

I can ping the internet from the Trust interface but nothing behind it.  My pcap shows ping from the trust interface NATs out correctly but the ping from a the devices behind the FW do not NAT at all.  Ping source 10.61.1.1 to host 8.8.8.8 success,   Ping source 10.61.1.2 host 8.8.8.8 fails....aged out.  Basically no NAT from devices behind the Trust interface.

 

L1 Bithead

Strange I updated the OS 9.1.4 to 9.1.5 rebooted and now it is working

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