IP Communication via VPN (LAN-LAN) Not Possible
- Boxes (LAN-to-LAN coupling), users may encounter issues where devices within one network are unable to access resources, such as file shares, printers, or other services, on the other...
- Follow these steps sequentially, testing the connection after each to determine if the problem is resolved.
- Example: If the remote FRITZ! Box uses the IP address 192.168.10.1 with a subnet mask of 255.255.255.0, any static route for the 192.168.10.0 network should be removed.
Troubleshooting FRITZ! Box VPN Connectivity Issues
Table of Contents
when establishing a VPN connection between two FRITZ! Boxes (LAN-to-LAN coupling), users may encounter issues where devices within one network are unable to access resources, such as file shares, printers, or other services, on the other FRITZ! Box network. Additionally, ping requests to devices on the remote network may go unanswered.
Initial Troubleshooting Steps
Follow these steps sequentially, testing the connection after each to determine if the problem is resolved.
1. Remove Static IP Routes
Static IP routes configured on either FRITZ! Box that point to the IP network of the other FRITZ! Box can interfere with VPN communication. These routes must be removed.
- Access the FRITZ! Box user interface.
- Navigate to “Home Network” then “Network.”
- Click on the ”Network Settings” tab.
- In the “WAN Setting” or “LAN Settings” section, select “Further Settings” to reveal all options.
- Click the “IPv4 Route” button.
- examine the table for any entries where the “Network” column contains the IP network address of the remote FRITZ! Box. Deactivate or delete these entries.
Example: If the remote FRITZ! Box uses the IP address 192.168.10.1 with a subnet mask of 255.255.255.0, any static route for the 192.168.10.0 network should be removed.
- Click “Apply” or “Take Over” to save the changes.
2. Restart the FRITZ! Boxes
A temporary error with either FRITZ! Box or the internet connection can prevent the VPN from establishing correctly. Restarting the devices can resolve this.
- In the FRITZ! Box user interface, click “System.”
- In the “System” menu, select “Backup.”
- Click the “Restart” tab.
- Click the “Restart” button.
3. configure Devices for Automatic IP Address Acquisition
Ensure that devices on the network are configured to automatically obtain their IP settings from the FRITZ! Box.This is typically the default setting.
4.Configure Device Firewalls
If a firewall is active on a device, configure it to allow communication with the IP network of the remote FRITZ! Box (e.g., 192.168.20.0). Consult the firewall’s documentation for specific instructions.
- If a firewall is installed on the device, configure it to not block communication with the IP network of the remote FRITZ! Box (e.g. 192.168.20.0). Facts on the facility can be obtained from the manufacturer of the firewall, e.g. in the manual.
5. Re-establish the VPN Connection
If IP communication remains unsuccessful,the VPN connection may be incorrectly configured. This can occur if the IP address (xxx.xxx.xxx.1) of the remote FRITZ! Box was entered rather of its IP network (xxx.xxx.xxx.0).
- Delete the existing VPN connection on both FRITZ! Boxes through their user interfaces.
- Reconfigure the VPN connection between the two FRITZ! Boxes, choosing either IPSec or WireGuard as the protocol.
Troubleshooting FRITZ! Box VPN Connectivity Issues: A Q&A Guide
What are common problems with FRITZ! Box VPN connections?
When setting up a LAN-to-LAN VPN between two FRITZ! Boxes,users may face issues like:
* Inability to access resources (file shares,printers,etc.) on the remote network.
* Unanswered ping requests to devices on the remote network.
what are the initial troubleshooting steps I should take?
Follow these steps sequentially, testing your VPN connection after each one to see if the problem is resolved. Remember, these instructions are