Fixing the 12-second timeout bug in Cisco AnyConnect < 4.7

Fixing the 12-Second Timeout Bug in Cisco AnyConnect < 4.7

Cisco AnyConnect is a popular remote access VPN solution used by many organizations worldwide. However, one common issue that users face is the 12-second timeout bug that occurs in versions earlier than 4.7. This issue can be frustrating for users, especially those who need to access critical resources remotely. This article will discuss the 12-second timeout bug in Cisco AnyConnect < 4.7 and provide a solution to fix it.

Understanding the 12-Second Timeout Bug

The 12-second timeout bug in Cisco AnyConnect < 4.7 occurs when the VPN client fails to establish a connection to the VPN server within 12 seconds. This issue can be caused by several factors, including network congestion, slow DNS resolution, or incorrect VPN server configurations. When this issue occurs, the VPN client will disconnect, and users will be unable to access the VPN server.

Increasing the Default Timeout Limit

One way to fix the 12-second timeout bug in Cisco AnyConnect < 4.7 is to increase the default timeout limit. This can be done by editing the VPN client configuration file. The following steps can be used to increase the timeout limit:

1. Locate the AnyConnect profile file. This file is usually located in the Cisco AnyConnect Secure Mobility Client installation directory.
2. Open the profile file using a text editor such as Notepad or Vim.
3. Locate the "anyconnect-profile-settings" section of the file.
4. Add the following line to the section: "connection-timeout 30". This will increase the timeout limit to 30 seconds.
5. Save and close the file.
6. Restart the Cisco AnyConnect Secure Mobility Client.

anyconnect-profile-settings {
    connection-timeout 30
}

Optimizing Network Settings

Another way to fix the 12-second timeout bug in Cisco AnyConnect < 4.7 is to optimize network settings. This can be done by adjusting the DNS settings, TCP keepalive settings, and network adapter settings. The following steps can be used to optimize network settings:

1. Adjust the DNS settings. Set the DNS server to a reliable and fast DNS server. This can be done by changing the DNS server settings in the network adapter settings.
2. Adjust the TCP keepalive settings. Set the TCP keepalive interval to a lower value. This can be done by editing the registry settings in Windows.
3. Adjust the network adapter settings. Set the network adapter to a high-performance mode. This can be done by changing the network adapter settings in the device manager.

The 12-second timeout bug in Cisco AnyConnect < 4.7 can be frustrating for users. However, there are several ways to fix this issue. Users can increase the default timeout limit or optimize network settings. By following the steps outlined in this article, users can ensure that their VPN connections are stable and reliable.

References

• Way to Increase 12 Seconds Default Timeout Cisco AnyConnect <= 4.7 without Establishing First