The vpn client was unable to successfully verify the ip forwarding table modifications mac os

Question: Q: Cisco AnyConnect: I keep getting the error ‘The VPN client was unable to successfully verify the IP forwarding table modifications’ after establishing connection

I still failing to get my Cisco AnyConnect 4.8.00175 VPN to work under Catalina 10.15.1 am seeing the same as this and this

Keep getting the error: ‘The VPN client was unable to successfully verify the IP forwarding table modifications’ after establishing connection and then the VPN connection is closed down again right away.

What might cause this issue and how to fix this, any hints appreciated, TIA!

[Re-Titled by Moderator]

Mac Pro, macOS 10.15

Posted on Nov 16, 2019 1:56 PM

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See App Compatibility Table — RoaringApps. Check if it’s compatible (64-bit) with Catalina. If it is compatible, then contact Cisco for tech support.

Nov 16, 2019 2:04 PM

Cisco AnyConnect 4.8.00175 VPN is a custom VPN by cisco (in my opinion, aimed at microsoft users). i extremely doubt it has anything to offer if you are connecting to «normal VPN» using an Apple. Also: apple user administration is highly different than microsoft and again different from linux. a custom VPN saying «works on all 3» is more likely to CAUSE PROBLEMS that it is to solve them (for example, apple uses LDAP in a well conceived model whereas ldap on linux is often not installed or configured if installed — and the two work completely differently — thus security would be a mountain of a problem for a «3 way security app» to achieve — in other words — it wouldn’t achieve it and be more likely to cause security issues than to provide a secure channel). another issue

HostScan Will Not Function With macOS 10.15 Without Upgrade (CSCvq11813)

AnyConnect HostScan packages earlier than 4.8.x will not function with macOS Catalina (10.15). End users who attempt to connect from macOS Catalina to ASA headends running HostScan packages earlier than 4.8.x will not be able to successfully complete VPN connections, receiving a posture assessment failed message.

To enable successful VPN connections for HostScan users, all DAP and HostScan policies must be HostScan 4.8.00175 (or later) compatible. Refer to AnyConnect HostScan Migration 4.3.x to 4.6.x and Later for additional information related to policy migration from HostScan 4.3.x to 4.8.x.

As a workaround to restore VPN connectivity, administrators of systems with HostScan packages on their ASA headends may disable HostScan. If disabled, all HostScan posture functionality, and DAP policies that depend on endpoint information, will be unavailable.

Permission Popups During Initial AnyConnect HostScan or System Scan Launch (CSCvq64942)

macOS 10.15 (and later) requires that applications obtain user permissions for access to Desktop, Documents, Downloads, and Network Volume folders. To grant this access, you may see popups during an initial launch of HostScan, System Scan (when ISE posture is enabled on the network), or DART (when ISE posture or HostScan is installed). ISE posture and HostScan use OPSWAT for posture assessment on endpoints, and the posture checks access these folders based on the product and policies configured.

At these popups, you must click OK to have access to these folders and to continue with the posture flow. If you click Don’t Allow, the endpoint may not remain compliant, and the posture assessment and remediation may fail without access to these folders.

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AnyConnect Error: Unable To Verify IP Forwarding Table Modifications

KB ID 0001646

Problem

While attempting to connect to a clients AnyConnect, this happened;

The VPN client was unable to successfully verify the IP forwarding table modifications. A VPN connection will not be established.

Or on older clients, you may see;

The VPN client was unable to modify the IP forwarding table. A VPN connection will not be established. Please restart your computer or device, then try again.

Solution

I was trying to connect from my house, I’d used this connection before from work and it was fine. I worked my way round the problem got my work finished, then re-looked at it the next time I was working from home.

The problem is actually quite simple, take a look at the IP I was using in my house.

Then take a look at the VPN Pool addresses that get allocated to the remote VPN clients (they overlap);

Note: This assumes you are using an ‘IP Pool’, If you are using an external DHCP server at the ‘Head end’ then you will need to check/change the scope there.

I fixed the problem by simply changing the ‘pool’ so it didn’t overlap.

WARNING : If you have any routing going on behind your firewall (i.e you have layer 3 switches internally, routing between networks or VLANS) you may need to change them to route the ‘new’ AnyConnect subnet back to the firewall.

Update: Solution Windows 10

If you are experiencing this problem on Windows 10, and the above solution is not applicable, consider deleting the following two files;

C:\ProgramData\Cisco\Cisco AnyConnect Secure Mobility Client\routechangesv4.bin
C:\ProgramData\Cisco\Cisco AnyConnect Secure Mobility Client\routechangesv6.bin

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Cisco AnyConnect broken on Catalina

Cisco AnyConnect is broken on Catalina. Throws up «The VPN client was unable to successfully verify the IP forwarding table modifications. A VPN connection will not be established.» error. Using version 4.7 of Cisco AnyConnect. Worked fine before upgrade to Catalina.

Answers

The same exact experience is occuring for me.
If I discover a workaround, I’ll be sure to post about it here

Same thing happened with the first and successive betas of Mojave. The fix ended up being a new version of AnyConnect by Cisco.

Is there an alternative to AnyConnect can be used?

OpenConnect is an alternative, depending on what you are trying to connect to this might not be allowed. I have also not tested this on 10.15.

Depending on what you’re trying to connect to, Cisco IPSec and others are available in macOS by default by adding a VPN interface in Network Preferences.

If your Mac is connected to an MDM use a profile pushed by it to whitelist the kext and see if it works after this. I expect the kext isn’t notarized so isn’t loading. Moving forward Cisco would need to ideally use DriverKit rather than a kext. I would create a support case with Cisco around this.

Same problem here.

version 4.7.0.3.0.52 is somehow working but getting «failed to load compliance module» error msg of system scan.

Maul. Do you have a link to offer for the download of this version? I can’t seem to find it.

Try to start app via terminal with sudo. For me it worked.

Confirmed. This approach worked for me too. Thanks!

Can you provide the commands/instructions for this? I am not able to duplicate this.

Does this require using the 4.7.x variant of the client? I’m using 4.6.x and sudo-starting the app didn’t improve the situation.

I am guessing something like this but it did not resolve my issue (obscured some information):

$ sudo /opt/cisco/anyconnect/bin/vpn connect vpn.domain.com

Cisco AnyConnect Secure Mobility Client (version 4.7.03052) .

Copyright (c) 2004 — 2019 Cisco Systems, Inc. All Rights Reserved.

>> notice: Ready to connect.

>> registered with local VPN subsystem.

>> contacting host (vpn.domain.com) for login information.

>> notice: Contacting vpn.domain.com.

>> Please enter your username and password.

>> notice: Establishing VPN session.

>> notice: The AnyConnect Downloader is performing update checks.

>> notice: Checking for profile updates.

>> notice: Checking for product updates.

>> notice: Checking for customization updates.

>> notice: Performing any required updates.

>> notice: The AnyConnect Downloader updates have been completed.

>> notice: Establishing VPN session.

>> notice: Establishing VPN — Initiating connection.

>> notice: Establishing VPN — Examining system.

>> notice: Establishing VPN — Activating VPN adapter.

>> notice: Establishing VPN — Configuring system.

>> notice: Disconnect in progress, please wait.

>> error: The VPN client was unable to successfully verify the IP forwarding table modifications. A VPN connection will not be established.

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Question: Q: Cisco AnyConnect VPN stopped working today, why?

Nothing has changed on tehe VPN server side our network admins says, but was working fine yesterday morning on the 25.feb 2020, but this morning our Macs fails to connect to our ASA gateway. Was running versions of Cisco AnyConnect More Less

Posted on Feb 26, 2020 2:10 AM

Uninstalled previous version, tried different other version like 4.7, 4.8 unstalled them as well and the stroke luck with v.4.4.02034, ran v.4.1 yesterday all on MacOS 10.14.6

Posted on Feb 26, 2020 5:50 AM

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Don’t see any overlapping between local IP range from WiFi cnx and VPN IP assigned range, as many others have states as a possible RC for the Unable to verify routing table modifications.

Output from VPN connect attemps of version 4.7.00136:

>> notice: Establishing VPN session.

>> notice: The AnyConnect Downloader is performing update checks.

>> notice: Checking for profile updates.

>> notice: Checking for product updates.

>> notice: Checking for customization updates.

>> notice: Performing any required updates.

>> notice: The AnyConnect Downloader updates have been completed.

>> notice: Establishing VPN session.

>> notice: Establishing VPN — Initiating connection.

>> notice: Establishing VPN — Examining system.

>> notice: Establishing VPN — Activating VPN adapter.

>> notice: Establishing VPN — Configuring system.

>> notice: Disconnect in progress, please wait.

>> error: The VPN client was unable to successfully verify the IP forwarding table modifications. A VPN connection will not be established.

>> notice: Ready to connect.

Feb 26, 2020 2:21 AM

successfully got v.4.4.02034 working!

Feb 26, 2020 3:39 AM

Good you got it working. Just a data point: I am successfully running MacOS 10.4.6 and Cisco VPN 4.6.04054.

Feb 26, 2020 5:13 AM

What did you do to get this working? I too woke up this morning to the same No components loaded error and am running Mojave.

Feb 26, 2020 5:44 AM

Uninstalled previous version, tried different other version like 4.7, 4.8 unstalled them as well and the stroke luck with v.4.4.02034, ran v.4.1 yesterday all on MacOS 10.14.6

Feb 26, 2020 5:50 AM

Thanks for the response! Additional question, how are you accessing various versions to attempt and download? I ahve only ever used one version.

Feb 26, 2020 5:58 AM

We had the same exact issue yesterday with version 4.2.01035. «No components loaded». It was working fine the day before. I ended up packing and deploying 4.8 which works. However, I have a support ticket with Cisco and sent them logs using the Diagnostic Reporting Tool to find out why that happened. What worries me is it could happen again in the future with another version. Will reply back once I get an answer, hopefully.

Feb 27, 2020 9:45 AM

Had this exact same issue — I have AnyConnect v.4.1.08005 on my work laptop, hasn’t been updated since 2015. Yesterday all of a sudden I got this «No components loaded» modal as soon as I opened the AC client. Opened a ticket with the company helpdesk but couldn’t wait for a response so I did my own investigation. I still don’t know why AC suddenly stopped working, but I did find a solution:

1. Installed OpenConnect (open source AnyConnect-compatible CLI VPN client) via Homebrew
2. Exported the certificate issued by my company CA from my login keychain to a .p12 file in a hidden folder in my user directory
3. Ran the following command: sudo openconnect -c

/.hidden/cert.p12 -x /opt/cisco/anyconnect/profile/PROFILE.xml —authgroup=TUNNEL-GROUP vpn.mycompany.com

Entered username when prompted

Entered passcode when prompted

SUCCESS

I have no idea if this is supported by my company and it wasn’t easy to configure, but it does work. I had to know where my certificate is (and how to export it from Keychain), where my AnyConnect profile is (I had a few, so I had to know which one to use), and the tunnel group I belong to. Hope this helps!

Источник

Cisco AnyConnect broken on Catalina

Cisco AnyConnect is broken on Catalina. Throws up «The VPN client was unable to successfully verify the IP forwarding table modifications. A VPN connection will not be established.» error. Using version 4.7 of Cisco AnyConnect. Worked fine before upgrade to Catalina.

Answers

I tried running `sudo /Applications/Cisco/Cisco\ AnyConnect\ Secure\ Mobility\ Client.app/Contents/MacOS/Cisco\ AnyConnect\ Secure\ Mobility\ Client`, but got the same error

Some questions: Does your Terminal app have any permissions enabled in System Preferences>Security & Privacy>Privacy?

Do you have SIP enabled?

Applies at least to MacOS: You should also check, that VPN does not give same DNS server IP that you have manually entered via Network settings for your adapter. Same error occurs also in that case. I would also recommend checking to make sure the Cisco client is up to date. Follow this guide to uninstall elder versions which may lead to creating a conflict.

FYI — encounter this on Mac with 10.15 and both Cisco 4.7 an 4.8.

This occurred when connected to my dock that was hard-wired to my home network and the laptop was simultaneouly connected to WiFi on the same network.

Workaround:

* Unplug the hard-wired ethernet connection from the dock

Doing either allowed it to connect. Based on a few other replies here and posts elsewhere, my theory is that Cisco doesn’t handle multiple connections to the same network correctly.

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