PAN-OS 8.1.0 SMB Issues

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L5 Sessionator

PAN-OS 8.1.0 SMB Issues

Hello all,

 

Please be advised, there is a current issue with PAN-OS 8.1 which seems to break anything SMB related, e.g. mapped network drives. Sessions have an end reason of "resources-unavailable" and go into state "Discard" in the session table.

 

Upon speaking with a TAC engineer, this is a known issue and they are working towards a fix.

 

Edit: This is now resolved in PAN-OS 8.1.1 under BugID:

 

PAN-94445
Fixed an issue where Server Message Block (SMB) sessions were in a discard state with the session end reason resources-unavailable

 

Thanks,

Luke.

 

L3 Networker

Re: PAN-OS 8.1.0 SMB Issues

TAC suggest to create an application override policy as workaround or downgrade to 8.0.X PANOS version.

 

Jacopo

L1 Bithead

Re: PAN-OS 8.1.0 SMB Issues

Did you try the Application Override or did you downgrade?

L0 Member

Re: PAN-OS 8.1.0 SMB Issues

Applicaton Override does the trick.

L1 Bithead

Re: PAN-OS 8.1.0 SMB Issues

I didn't have time to mess around on Sunday when this was discovered, so we downgraded.  Thankfully that went smoothly.

L0 Member

Re: PAN-OS 8.1.0 SMB Issues

Thanks for the info, I was just about to deploy 8.1 to one firewall :)

L1 Bithead

Re: PAN-OS 8.1.0 SMB Issues

Ended up doing a downgrade too, went back to 8.0.8. I so wanted the hit counter :(

 

Does anyone know if there is an Issue ID for this problem?

Re: PAN-OS 8.1.0 SMB Issues

We did the downgrade also. Waiting to resolve the issue
L1 Bithead

Re: PAN-OS 8.1.0 SMB Issues

We just had a day's outage due to this issue.  Palo Alto *really* should have pulled the update and warned people who have installed it.

L1 Bithead

Re: PAN-OS 8.1.0 SMB Issues

So far I've had no issues with 8.1 och PA-220, not that much traffic passing through it though...

On a couple of PA-850 the only option was to do a downgrade, no SMB traffic worked as intended.

 

Could it be related to certian hardware platforms? What platforms have you experienced problems on?

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