> For the complete documentation index, see [llms.txt](https://docs.pritunl.com/kb/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.pritunl.com/kb/vpn/link/link-connectivity-issues.md).

# Connectivity Issues

Connectivity issues are often caused by incorrectly configured firewalls. In the example below **client1** is making a SSH connection to **server1**. For this connection **server1** must allow ssh traffic from the IP address of **client1**. This connection will also require that **pritunl-link** accept ssh traffic from **client1**. The ssh connection going to **server1** will still be detected as ingress traffic to **pritunl-link** requiring that both **pritunl-link** and **server1** allow the traffic from **client1**. To avoid this typically **pritunl-link** should accept all traffic from the VPC network with **client1**.

(client1 ssh client) -> (pritunl-link) -> (server1 ssh server)


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