topic Re: Split Tunnel Routing Config Help in General Topics

Split Tunnel Routing Config Help

Dan_Swartz — Fri, 11 Jun 2021 15:23:04 GMT

Looking for some help on split tunneling.

We are on PAN os 9.1.9 GP client 5.26, for our LAN we also use Cisco Umbrella to block sites.

What I want to do is when GlobalProtect connects I want all LAN traffic going through the VPN traffic, and all Internet traffic from the client going through their end, not the VPN

When I try and configure split tunneling on my gateway I follow the steps in the Split Tunneling doc, I include all my local LAN subnets in X.X.X.X/24 notation. In the Exclude I put 0.0.0.0/0

However when I connect and test with a known blocked site, I still get a blocked message. Looks like internet requests are still going through the GP client and our local LAN internet connection.

I am not sure what I am doing wrong here. Any one have any ideas?

Thank you in advance.

Re: Split Tunnel Routing Config Help

JoergSchuetter — Fri, 11 Jun 2021 16:30:36 GMT

Hello @Dan_Swartz

Did you check the routes on the client (using "route print")?

Re: Split Tunnel Routing Config Help

Gareth.Doyle — Fri, 11 Jun 2021 17:22:14 GMT

Did you enable access to the Local Network?

Re: Split Tunnel Routing Config Help

Dan_Swartz — Fri, 11 Jun 2021 16:35:56 GMT

Yes I did and all the include routes are listed, as far as the 0.0.0.0/0 route that points at the local adapter. also if I do a trace route it goes out the local adapter and does not get passed through the VPN. I did a trace both connected and disconnected from the VPN

Re: Split Tunnel Routing Config Help

Dan_Swartz — Fri, 11 Jun 2021 16:37:03 GMT

You mean beyond the LAN subnets in the include area of split tunneling?

Re: Split Tunnel Routing Config Help

Gareth.Doyle — Fri, 11 Jun 2021 17:23:05 GMT

Yes, there is an option to enable/disable local network access when you are connected to the VPN. If you are not allowed LAN access then split-tunnel routes won't matter.

Re: Split Tunnel Routing Config Help

Mick_Ball — Fri, 11 Jun 2021 17:59:17 GMT

Not sure what of what is causing your issue but we have this on a test gateway. We just include all rfc private nets by using address objects and exclude nothing....... and we only see traffic to private network addresses traversing the vpn.

I assume you are not using a proxy???

Re: Split Tunnel Routing Config Help

Dan_Swartz — Fri, 11 Jun 2021 18:18:19 GMT

No Proxy. But when I read the Palo Alto docs on split tunneling it said if you check the box "No direct access to local network" that in fact that disables split tunneling. Is that right?

Re: Split Tunnel Routing Config Help

Dan_Swartz — Fri, 11 Jun 2021 18:18:51 GMT

I have that box un checked per the Palo Alto directions

Re: Split Tunnel Routing Config Help

Gareth.Doyle — Fri, 11 Jun 2021 19:01:31 GMT

No, that does not disable split-tunneling, that just enabled direct LAN access. For instance, if you have that box checked, you cannot reach local printers on the same subnet.

Re: Split Tunnel Routing Config Help

Dan_Swartz — Fri, 11 Jun 2021 19:33:35 GMT

OK, so I removed the 0.0.0.0/0 and I checked that box.

Internet Traffic is still trying to go through the firewall. Like I mentioned above, we use Cisco Umbrella. So prior to me putting that check "on" traffic would go through the firewall then hit Cisco Umbrella and be blocked. Now when I do it I get one of our firewall blocked screens, not a Cisco Umbrella block screen

Re: Split Tunnel Routing Config Help

Mick_Ball — Fri, 11 Jun 2021 19:38:50 GMT

Regarding no access to local cal net.. Well that was my understanding but with the config i posted i am able to admin my local router...

Re: Split Tunnel Routing Config Help

Mick_Ball — Fri, 11 Jun 2021 19:40:58 GMT

Ok are you refreshing GP after updating tunnel settings.. and can you post here split tunnel settings.

Re: Split Tunnel Routing Config Help

Mick_Ball — Fri, 11 Jun 2021 19:43:20 GMT

Also can you post a route print output...?

Re: Split Tunnel Routing Config Help

Dan_Swartz — Fri, 11 Jun 2021 19:59:36 GMT

Yes I disconnect, and I go into my local user app data folder and delete certs etc.

Apologize for the long route print, we need multiple networks available to our users via vpn

Interface List
54...02 50 41 00 00 01 ......PANGP Virtual Ethernet Adapter #48
63...34 97 f6 89 bf 20 ......Intel(R) Ethernet Connection (2) I219-V
33...34 97 f6 89 bf 20 ......Hyper-V Virtual Ethernet Adapter #2
5...5c f3 70 7f 2f 75 ......Bluetooth Device (Personal Area Network)
1...........................Software Loopback Interface 1
82...00 15 5d 94 8a 00 ......Hyper-V Virtual Ethernet Adapter
===========================================================================

IPv4 Route Table
===========================================================================
Active Routes:
Network Destination Netmask Gateway Interface Metric
0.0.0.0 0.0.0.0 192.168.1.1 192.168.1.244 281
0.0.0.0 0.0.0.0 192.168.1.1 192.168.1.124 25
0.0.0.0 0.0.0.0 On-link 172.16.52.22 1
10.30.0.0 255.255.255.0 On-link 172.16.52.22 1
10.30.0.255 255.255.255.255 On-link 172.16.52.22 257
10.30.1.0 255.255.255.0 On-link 172.16.52.22 1
10.30.1.255 255.255.255.255 On-link 172.16.52.22 257
10.30.2.0 255.255.255.0 On-link 172.16.52.22 1
10.30.2.255 255.255.255.255 On-link 172.16.52.22 257
10.30.3.0 255.255.255.0 On-link 172.16.52.22 1
10.30.3.255 255.255.255.255 On-link 172.16.52.22 257
10.33.0.0 255.255.255.0 On-link 172.16.52.22 1
10.33.0.255 255.255.255.255 On-link 172.16.52.22 257
10.33.1.0 255.255.255.0 On-link 172.16.52.22 1
10.33.1.255 255.255.255.255 On-link 172.16.52.22 257
10.33.2.0 255.255.255.0 On-link 172.16.52.22 1
10.33.2.255 255.255.255.255 On-link 172.16.52.22 257
10.33.3.0 255.255.255.0 On-link 172.16.52.22 1
10.33.3.255 255.255.255.255 On-link 172.16.52.22 257
10.34.0.0 255.255.255.0 On-link 172.16.52.22 1
10.34.0.255 255.255.255.255 On-link 172.16.52.22 257
10.34.1.0 255.255.255.0 On-link 172.16.52.22 1
10.34.1.255 255.255.255.255 On-link 172.16.52.22 257
10.34.2.0 255.255.255.0 On-link 172.16.52.22 1
10.34.2.255 255.255.255.255 On-link 172.16.52.22 257
10.34.3.0 255.255.255.0 On-link 172.16.52.22 1
10.34.3.255 255.255.255.255 On-link 172.16.52.22 257
10.35.0.0 255.255.255.0 On-link 172.16.52.22 1
10.35.0.255 255.255.255.255 On-link 172.16.52.22 257
10.35.1.0 255.255.255.0 On-link 172.16.52.22 1
10.35.1.255 255.255.255.255 On-link 172.16.52.22 257
10.35.2.0 255.255.255.0 On-link 172.16.52.22 1
10.35.2.255 255.255.255.255 On-link 172.16.52.22 257
10.35.3.0 255.255.255.0 On-link 172.16.52.22 1
10.35.3.255 255.255.255.255 On-link 172.16.52.22 257
10.40.0.0 255.255.255.0 On-link 172.16.52.22 1
10.40.0.255 255.255.255.255 On-link 172.16.52.22 257
10.40.1.0 255.255.255.0 On-link 172.16.52.22 1
10.40.1.255 255.255.255.255 On-link 172.16.52.22 257
10.40.2.0 255.255.255.0 On-link 172.16.52.22 1
10.40.2.255 255.255.255.255 On-link 172.16.52.22 257
10.40.3.0 255.255.255.0 On-link 172.16.52.22 1
10.40.3.255 255.255.255.255 On-link 172.16.52.22 257
10.80.0.0 255.255.255.0 On-link 172.16.52.22 1
10.80.0.255 255.255.255.255 On-link 172.16.52.22 257
10.80.1.0 255.255.255.0 On-link 172.16.52.22 1
10.80.1.255 255.255.255.255 On-link 172.16.52.22 257
10.80.2.0 255.255.255.0 On-link 172.16.52.22 1
10.80.2.255 255.255.255.255 On-link 172.16.52.22 257
10.90.5.0 255.255.255.0 On-link 172.16.52.22 1
10.90.5.2 255.255.255.255 On-link 172.16.52.22 1
10.90.5.3 255.255.255.255 On-link 172.16.52.22 1
10.90.5.255 255.255.255.255 On-link 172.16.52.22 257
10.90.6.0 255.255.255.0 On-link 172.16.52.22 1
10.90.6.255 255.255.255.255 On-link 172.16.52.22 257
10.90.7.0 255.255.255.0 On-link 172.16.52.22 1
10.90.7.255 255.255.255.255 On-link 172.16.52.22 257
10.90.8.0 255.255.255.0 On-link 172.16.52.22 1
10.90.8.255 255.255.255.255 On-link 172.16.52.22 257
10.90.9.0 255.255.255.0 On-link 172.16.52.22 1
10.90.9.255 255.255.255.255 On-link 172.16.52.22 257
10.90.10.0 255.255.255.0 On-link 172.16.52.22 1
10.90.10.255 255.255.255.255 On-link 172.16.52.22 257
68.225.134.162 255.255.255.255 192.168.1.1 192.168.1.124 25
127.0.0.0 255.0.0.0 On-link 127.0.0.1 331
127.0.0.1 255.255.255.255 On-link 127.0.0.1 331
127.255.255.255 255.255.255.255 On-link 127.0.0.1 331
172.16.52.22 255.255.255.255 On-link 172.16.52.22 257
172.17.192.0 255.255.240.0 On-link 172.17.192.1 5256
172.17.192.0 255.255.240.0 On-link 172.16.52.22 1
172.17.192.1 255.255.255.255 On-link 172.17.192.1 5256
172.17.207.255 255.255.255.255 On-link 172.17.192.1 5256
172.17.207.255 255.255.255.255 On-link 172.16.52.22 1
192.168.1.0 255.255.255.0 On-link 192.168.1.124 281
192.168.1.0 255.255.255.0 On-link 192.168.1.244 281
192.168.1.0 255.255.255.0 On-link 172.16.52.22 1
192.168.1.124 255.255.255.255 On-link 192.168.1.124 281
192.168.1.244 255.255.255.255 On-link 192.168.1.244 281
192.168.1.255 255.255.255.255 On-link 192.168.1.124 281
192.168.1.255 255.255.255.255 On-link 192.168.1.244 281
192.168.1.255 255.255.255.255 On-link 172.16.52.22 1
192.168.4.0 255.255.254.0 On-link 172.16.52.22 1
192.168.5.255 255.255.255.255 On-link 172.16.52.22 257
192.168.107.0 255.255.255.0 On-link 172.16.52.22 1
192.168.107.255 255.255.255.255 On-link 172.16.52.22 257
192.168.204.0 255.255.255.0 On-link 172.16.52.22 1
192.168.204.255 255.255.255.255 On-link 172.16.52.22 257
192.168.206.0 255.255.255.0 On-link 172.16.52.22 1
192.168.206.255 255.255.255.255 On-link 172.16.52.22 257
192.168.207.0 255.255.255.0 On-link 172.16.52.22 1
192.168.207.255 255.255.255.255 On-link 172.16.52.22 257
224.0.0.0 240.0.0.0 On-link 127.0.0.1 331
224.0.0.0 240.0.0.0 On-link 192.168.1.244 281
224.0.0.0 240.0.0.0 On-link 192.168.1.124 281
224.0.0.0 240.0.0.0 On-link 172.17.192.1 5256
224.0.0.0 240.0.0.0 On-link 172.16.52.22 257
255.255.255.255 255.255.255.255 On-link 127.0.0.1 331
255.255.255.255 255.255.255.255 On-link 192.168.1.244 281
255.255.255.255 255.255.255.255 On-link 192.168.1.124 281
255.255.255.255 255.255.255.255 On-link 172.17.192.1 5256
255.255.255.255 255.255.255.255 On-link 172.16.52.22 257
===========================================================================
Persistent Routes:
Network Address Netmask Gateway Address Metric
0.0.0.0 0.0.0.0 192.168.1.1 Default
===========================================================================

IPv6 Route Table
===========================================================================
Active Routes:
If Metric Network Destination Gateway
1 331 ::1/128 On-link
33 281 fe80::/64 On-link
82 5256 fe80::/64 On-link
33 281 fe80::b128:13fb:51d7:6ebb/128
On-link
82 5256 fe80::fc39:13dc:f5c7:59a8/128
On-link
1 331 ff00::/8 On-link
33 281 ff00::/8 On-link
82 5256 ff00::/8 On-link
54 276 ff00::/8 On-link
===========================================================================
Persistent Routes:
None

Re: Split Tunnel Routing Config Help

Mick_Ball — Sat, 12 Jun 2021 07:17:26 GMT

apologies @Gareth.Doyle . the access to local network does need to be allowed when using windows. Not needed though for IOS.

@Dan_Swartz

still works fine for me on windows. screen dump below with firefox filter shows BBC traffic going via local adapter and works admin server via PAngp.

Re: Split Tunnel Routing Config Help

Mick_Ball — Sat, 12 Jun 2021 07:26:39 GMT

also.... you seem to have a few default routes, have you added manually to local Nic's.

you have 3 default routes and the GP tunnel has the lowest metric of 1.

here is what I get...

Re: Split Tunnel Routing Config Help

Dan_Swartz — Sat, 12 Jun 2021 16:29:12 GMT

I think the extra default routes are from AnyDesk. I use that to remote into that machine outside our corporate network so I can test the VPN

Re: Split Tunnel Routing Config Help

Mick_Ball — Mon, 14 Jun 2021 07:59:12 GMT

you need to see what is adding this route with metric 1 as this will cause default route via GP as a higher priority.

Re: Split Tunnel Routing Config Help

Dan_Swartz — Mon, 14 Jun 2021 14:17:06 GMT

Odd, that is the IP address the Palo Alto Assigns me when I connect to the VPN