Problems connecting via VPN (faq.sit.vpn.WebHome)

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If VPN concentrator after connection does not require login and password, please check your connection to VPN concentrator by using command:

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* From internet: **ping vpn.vsb.cz**

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\\(Enter ping command similary like [[here>>doc:tuonet.sit-nastaveni.ping.WebHome]].)

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If server do not respond there is very likely problem with your network connection. (% style="color:#cc0000" %)Ask your provider for help(%%).

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VPN concentrators have no capacity limits.

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If login and password is requied again and again, you are probably entering bad login or password. You may check if your password is not blocked [[here>>url:https://innet.vsb.cz/cs/uzivatelsky-ucet/potrebuji-poradit/problemy-s-prihlasenim/]].

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Also check if your access was not blocked due sharing (check your academic email).

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Often there are problems with firewall settings or antivirus malfunction. Try deactivate them temporarily and connect again.

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If you are connected to internet via SOHO router, problem might be there. Try to update firmware to the lastest version. We also register this problem at some TP-Link routers.

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If you have a problem connecting through the AnyConnect client, make sure that you do not have activated a proxy server (Various anonymization services, etc.).

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When you are installing the AnyConnect client and you will get the error message "**Web-based installation was unsuccessful**", perform the installation manually by clicking "**Install using the link below**".

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When installing the AnyConnect client, an error occurs "** The VPN client agent was unable to create the interprocess communication depot **", it is necessary to disable the service in the Windows Internet Connection Sharing / Internet Connection Sharing (for example [[https:~~/~~/its.uiowa.edu/support/article/3723>>url:https://its.uiowa.edu/support/article/3723]])

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If you use Chrome / Chromium may appear instead of the page content vpn.vsb.cz following error: ** Error 324 (net :: ERR_EMPTY_RESPONSE): Unknown error **. The solution is to run the program with the following argument: ** - -disable-ssl-false-start **. Argument can add the shortcut properties (icon Chrome / Chromium) in the Target box: .. ** chrome.exe-- --disable-ssl-false-start **. More technical information can be found, for example,

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[[here>>url:https://tools.ietf.org/html/draft-bmoeller-tls-falsestart-00#page-3]].

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__**Only for Cisco VPN client:**__

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When logging will be correctly, but have problems when transferring data, set with utility setmtu ** ** MTU 1300 B. Program in the directory with a VPN client "Program Files / Cisco Systems / VPN Client".

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if your Internet service provider uses address translation, you must have setup a VPN client checked item ** ** Enable Transparent Tunneling. Check this tab ** ** Transport. You can use IPSec over UDP (preferred) and IPSec over TCP.

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When using the Cisco VPN client is needed to the Windows (% style="color:rgb (204, 0, 0)" %) was not (%%) installed ** Transport Protocol compatible with NWLink IPX / SPX **. Uninstall it in the Control Panel ** ** Network Connections.

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Occurs when you install the client on Windows Vista or Windows 7 ** error Internal Error 2738 or 1720 **, follow these steps. Use this procedure even in the case when installed on Windows 7 64 bit error occurs ** Installation ended prematurely Because of an error **.

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__Only for Windows 7: __

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1. First you need to delete a registry key (there may be even twice):

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##HKEY_CURRENT_USER\SOFTWARE\Classes\CLSID\{B54F3741-5B07-11CF-A4B0-00AA004A55E8}##

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On Windows 7 64bit it is the key:

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##HKEY_CURRENT_USER\Software\Classes\Wow6432Node\CLSID\{B54F3741-5B07-11CF-A4B0-00AA004A55E8}##

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