Problem of proxy with AnyConnect SBL

Hello

Recently, I added the following line to our profile of .xml AnyConnect:

IgnoreProxy

We use a server proxy internally in our network, so when client computers have been set up for this, they could not connect to our ASA with AnyConnect when they were out of the site. The above setting in their corrected profile that, even if the proxy is enabled in their IE, they could connect with AnyConnect roaming. So far so good.

Yesterday, I added the following to our configuration:

TEST group policy attributes

use a MSIE-proxy-server method

Internet Explorer-proxy server value ip.ip.ip.ip:port

activate Internet Explorer-proxy local-bypass

This configuration was to ensure that the proxy of the user is enabled when connected to the VPN. According to doc Cisco proxy on the client settings automatically return to its original settings when disconnecting. This also works as expected.

But then, here is the funny thing (which is not funny at all really):

When to start the client computer and start-up of the AnyConnect client before logon Windows (SBL), I get the prompt attached when trying to connect! This only happens with SBL – not when the user connects and then starts the VPN client. I tried with different proxy user auth I know work, but I can't get through and therefor unable to connect before Windows logon. According to the doc of Cisco, the proxy settings should apply logon AFTER VPN - but it seems he's trying to use them BEFORE trying to connect when you use NFP.

No one knows why this happens? And anyone can come up with a solution (except disable proxy settings just made)?

Thanks in advance - much appreciated!

/ Rasmus

Rasmus,

Bad news... I checked the "fixed in" field in bugs.

002.005 (1002) and 002.005 (2000)

which means - it will be corrected in the new version.

Symptom:
The "IgnoreProxy" setting in the AnyConnect XML profile is not functioning when Start Before Login (SBL) is also enabled.

Conditions:
Problem first observed on AnyConnect 2.4.1012 when "IgnoreProxy" is set in the xml profile. Using Start Before Login feature (SBL). Using GPOs to set the proxy before login. Most noticable when the Proxy that is set is internal/private because the AnyConnect will not be able to reach the headend device to make the anyconnect connection due to the proxy being set. Confirmed the profile is active. The "IgnoreProxy" setting in the profile is working for a non-SBL connection.

Workaround:
1. This does work without SBL. For instance If you cancel SBL, logon to windows in the usual way and then start the Anyconnect client. If you then disconnect and reconnect the AnyConnect it does indeed ignore the configured proxy.
2. Disable GPO settings that push the proxy before login.
Note: If you are using GPO to launch scripts, be aware AnyConnect also now has a OnConnect scripting feature to launch scripts as well

Tags: Cisco Security

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