Help setting up internet connection

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L0 Member

Help setting up internet connection

Hi there

We're in the process of cutting over to a new internet connection and I'm trying to get our PA 2050 configured to handle to new IP range but I'm a bit stuck. We've been assigned the 111.69.54.112/28 subnet with 111.69.54.113 being the default gateway.

Currently I've set the external interface to 111.69.54.112/28 and configured a virtual router with a static route for 0.0.0.0/0 to 111.69.54.113. Finally I've set an outbound NAT rule of Dynamic IP and Port, address type is Interface Address, interface is ethernet 1/2 (the external interface) and the IP address is 111.69.54.112/28 but no joy.

I'm basing this config on our existing working config but that one has the default gateway outside the subnet assigned to us. That subnet is 203.167.208.174/30 and the default gateway is 203.167.203.173.

Any suggestions on where I've gone wrong?

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Accepted Solutions
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L4 Transporter

The portions of your configuration that you have posted appear to be correct. You can check the traffic logs to see if the traffic is being translated. From there, you may want to open a case with support.

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L5 Sessionator

Do you see the arp entry for the new def gateway.

>show arp all

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L0 Member

Yes, first entry in the arp table

interface     ip address  hw address    port     status   ttl 

--------------------------------------------------------------------------------

ethernet1/2   111.69.54.113   a8:d0:e5:05:2a:41 ethernet1/21142
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L5 Sessionator

Can you ping .113 from .112 (you might want to enable management profile for testing).

I can reach 111.69.54.113 from my side.

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L0 Member

No can't ping it but in saying that, can't ping the upstream router from the existing external interface and that still works anyway. The management profile is set to allow ping.

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L5 Sessionator

Can we try sending out garps on that interface to confirm the correct hw address

https://live.paloaltonetworks.com/docs/DOC-2878

There is no deny all policy right?

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L0 Member

test arp gratuitous ip 111.69.54.112/28 interface ethernet1/2

1 ARPs were sent


Still no internet access. I do have a deny all rule at the bottom of my security rules. Checking the network monitor from my test IP,  I can see my traceroute and internet activity being allowed by my Layer 3 External rule.

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L5 Sessionator

Any interface errors

show interface ethernet1/2

have you tried changing the cable.

If all of the above does not work please open a support case with us.

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Not applicable

Make sure that the interfaces you are sending traffic to and from are both part of the same virtual router. If they are using seperate virtual routers you will need to set up routing between them.

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L0 Member

Actually it appears I misunderstood what our ISP set up for us. I received this email from them.

You have been allocated a new subnet 111.69.54.112/28. We have configured 111.69.54.113 in our core. The rest of the addresses .114 to .126 are available for you to use on your firewall for interface addressing, NAT etc. You will need to change the ip address on the outside of your firewall to one of these available addresses and change your default route to point to next hop 111.69.54.113.

So my question is then, how do I got about setting up my external interface to have the IP addresses from .114 to .126 and what would my outbound NAT rule look like?

Here's some of my current non-functional config

interfaces.jpg

router.jpg

nat.jpg

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