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#PALO ALTO NETWORKS VPN UDP PERFORMANCE HOW TO#
#PALO ALTO NETWORKS VPN UDP PERFORMANCE UPGRADE#
#PALO ALTO NETWORKS VPN UDP PERFORMANCE WINDOWS#

" show counter global filter delta yes" is your friend! While the file transfer is ongoing, run this command a couple of times and check if you see suspicious counter building up.

For more information on this task, please refer to: /en-us/library/dn610980(v=ws.11).aspx

#PALO ALTO NETWORKS VPN UDP PERFORMANCE WINDOWS#

Because of the way that SMBv3 multi-channel works in splitting up files Palo Alto Networks recommends disabling SMB multi-channel through the Windows PowerShell.

If you're testing with SMBv3, try disabling multichannel on the Windows server and client.

If you have the option, try different protocols (SCP, FTP, HTTP) to make sure that it's an SMB decoder issue.

Here are some additional debugging steps or troubleshooting tips you can look into: Sometimes you might have to dig somewhat deeper or even have Palo Alto Networks Support look into the issue.

#PALO ALTO NETWORKS VPN UDP PERFORMANCE UPGRADE#

So check out the PAN-OS Software Release Guidance to confirm you're running the recommended PAN-OS release or if you are in need of an upgrade to rule out eventual bugs from previous software versions. Make sure you're on a recommended PAN-OS release to ensure any issues encountered are not caused by software. Note that DSRI is not limited to SMB traffic and can be used on other scenarios as well:ĭotW: Using DSRI with the Palo Alto Networks firewall Typically, DSRI is used in environments where internal servers are trusted !! With DSRI, the firewall will only inspect C2S traffic ! By default, traffic in both directions from client-to-server (C2S) and from server-to-client (S2C) will be inspected. In case an App Override is not possible because L-7 inspection is required, an alternative workaround would be to disable server response inspection (DSRI).

#PALO ALTO NETWORKS VPN UDP PERFORMANCE HOW TO#

Tips & Tricks: How to Create an Application Override

This approach should be used only if other fail safes are in place, and only between trusted hosts:

You can disable content inspection by adding an app-override for this specific traffic, this will allow the session through using fast-path. Reading the above already hints to a possible solution/workaround. This generally leads to a decreased throughput. For SMB, every payload is scanned for content inspection and there is no offload mechanism to increase speed. Suspending only for one file could allow evasion for all subsequent files in the same session. The SMB decoder is unable to implement suspend since file transfers are done in a block-based manner, requiring continuous CTD inspection to follow the protocol on each block. SMB content is inspected differently compared to other protocols, like HTTP or FTP for example.

GlobalProtect SSL VPN Slow SMB Transfers (discussion)Īllow me to first explain why SMB is a bit of a special protocol and why it's behaving the way it is:.

GlobalProtect SMB Traffic Slowness (discussion).

How to Improve Performance for Protocols like SMB and FTP Without Application Override(KB article).

97% Speed Decrease On SMB Traffic PAN-OS 8.1 (discussion).

These might already provide you a solution or give you some guidance to troubleshoot if you're experiencing this issue: Searching the LIVE community will already provide you with a couple of links featuring some related discussions and KB articles. Proposed by both community members and TAC engineers, several community members have found these useful and they've helped solve issues in the past. In this blog, I'll highlight a couple of solutions.

Every once in a while, there's a returning question on why SMB traffic is so slow.