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- ## Tips to debug VPN issues
- Assuming 10.81.1.159 is the services overlay IP we're trying to reach.
- Check where the VPN is running:
- ```
- kontena service show vpn
- ```
- Take ssh to the node where VPN is running. On that host:
- ```
- $ docker run -ti --rm --net container:vpn-1 corfr/tcpdump -vvv -i any dst 10.81.1.159
- ```
- Now from the client (which is connected through vpn)
- ```
- ping 10.81.1.159
- ```
- ## Other sources for possible info
- VPN logs:
- ```
- kontena service logs vpn
- ```
- Weave logs:
- ```
- kontena grid logs -c weave
- ```
- ## Tracing the weave interface on host
- Requires tcpdump on the host. Let run while pinging from client
- ```
- tcpdump -vvv -i weave dst 10.81.1.159
- ```
- ## On the client side
- ```
- $ traceroute -F 10.81.1.159 1500
- ```
- The above should report possible MTU issues within the path
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