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updating the doc with anyconnect vpn conflicting software #5989

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updating the doc with anyconnect vpn conflicting software
komal-hashi Aug 20, 2025
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addressed pr comments
komal-hashi Sep 4, 2025
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18 changes: 18 additions & 0 deletions website/content/docs/api-clients/client-agent.mdx
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Expand Up @@ -771,6 +771,24 @@ Running a MacOS VM in Parallels Desktop with shared networking causes the system
As a workaround, you can configure Parallels Desktop to use a different network mode.
Select an alternative network configuration such as **Host-Only**, **Default Adapter**, or **Wi-Fi** instead of **Shared Network**.
Refer to the Parallels Desktop documentation for more information.
### Cisco AnyConnect VPN

When you run the Cisco AnyConnect VPN at the same time as the Boundary Client Agent, DNS resolution may fail for Boundary aliases.

The Boundary Client Agent runs on the default IPv4 range `100.x.x.x`. Cisco AnyConnect VPN treats this range as a **secured range**, which forces DNS queries to resolve through the VPN instead of the Boundary Client Agent. As a result, Boundary aliases cannot be resolved.

You can configure the Boundary Client Agent to use a different IPv4 prefix by setting the `v4_prefix` option in the client configuration file. This setting overrides the default `100.x.x.x` range and avoids the conflict with Cisco AnyConnect VPN.

For example:
```hcl
v4_prefix = "172.16.0.0/12"
```
<Note>
You can set the `v4_prefix` to any valid RFC1918 private IPv4 range, as long as it does not overlap with ranges secured by the VPN. Common options include:
- `10.0.0.0/8`
- `172.16.0.0/12`
Choose a range that best fits your environment.
</Note>

## Uninstall the Client Agent on Mac

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