Wireguard with Oracle Cloud free tier

[panks21]

Anyone with wireguard experience on oracle cloud, please help.
I spinup a Ubuntu 22.04 VM.Standard.E2.1.Micro (Always free) on Oracle cloud and trying to create a site-2-site wireguard tunnel from debian machine at home. I have static IP at home.
the VM at home sees both incoming and outgoing packets but the VM on the cloud does not see any incoming packets. I have allowed the required port on the security list for my VM instance

VM at Home

interface: wg0
  public key: <home-debian-public-key>
  private key: (hidden)
  listening port: 40195

peer: <oci-ubuntu-public-key>
  endpoint: <oci-public-ip>:40195
  allowed ips: 10.23.44.2/32, 10.0.44.0/24
  transfer: 14.89 KiB received, 44.66 KiB sent
  persistent keepalive: every 15 seconds

VM at Oracle Cloud

interface: wg0
  public key: <oci-ubuntu-public-key>
  private key: (hidden)
  listening port: 40195

peer: <home-debian-public-key>
  endpoint: <home-public-ip>:40195
  allowed ips: 10.23.44.1/32, 192.168.50.128/25, 192.168.50.0/25
  transfer: 0 B received, 2.89 KiB sent

No

<home-public-ip>/32

UDP

All

40195

UDP traffic for ports: 40195

Wireguard Port

 

[WieldyBinkie]

You need to an add allowing rule at the top of the iptable.

 

[panks21]

@WieldyBinkie Which rule??

 

[WieldyBinkie]

Setup WireGuard on Oracle Linux

 

[panks21]

I am not using Oracle Linux. It is Ubuntu 22.04 on the Oracle Cloud

 

[WieldyBinkie]

I used this script to set up wireguard. Maybe give it a try. Github: Wireguard Script

 

[royalroy]

The oracle ubuntu image has all the ports closed by default. An easy workaround is to flush all iptables rules and make them persistent on reboot.

sudo iptables -F

sudo netfilter-persistent save

 

[panks21]

Ok thanks. Let me try with flushed rules

 

[panks21]

thanks @royalroy. Its working now

interface: wg0
  public key: <oci-ubuntu-public-key>
  private key: (hidden)
  listening port: 40195

peer: <home-debian-public-key>
  endpoint: <home-public-ip>:40195
  allowed ips: 10.23.44.1/32, 192.168.50.128/25, 192.168.50.0/25
  latest handshake: 56 seconds ago
  transfer: 755.90 KiB received, 3.54 MiB sent