After rebooting the server, OpenVPN is not working.

[gagangupta1404]

Hello Team,

I have configured OpenVPN on my Ubuntu server, and everything is going fine, but when my server restarts, our vpn clients are not able to access the internet, although the VPN is still connected.

[mindcont]

same

[CHIP0K]

check it out iptables masquerading rules and IP forwarding

root@tf-ovpnxortcp-radius-blr1-5:/home/chip$ iptables-save | grep MASQUERADE
-A POSTROUTING -s 192.168.255.0/24 -o eth0 -j MASQUERADE
-A POSTROUTING -s 192.168.254.0/24 -o eth0 -j MASQUERADE

and

root@tf-ovpnxortcp-radius-blr1-5:/home/chip$ sysctl net.ipv4.ip_forward
net.ipv4.ip_forward = 1

so, my sysctl config

cat > /etc/sysctl.d/ovpnxor.conf <<EOF
net.ipv4.ip_forward = 1
net.ipv4.ip_no_pmtu_disc = 1
net.ipv4.conf.all.rp_filter = 1
net.ipv4.conf.all.accept_redirects = 0
net.ipv4.conf.all.send_redirects = 0
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1
net.ipv6.conf.SERVER_PUB_NIC.disable_ipv6 = 1
EOF

[wid-get]

Hi, @gagangupta1404 @mindcont . I had the same issue. Edit /etc/systemd/system/iptables-openvpn.service and change line Before=network-online.target to After=network-online.target. Save the file, reboot and check.

[gits7r]

@wid-get that's odd - on Debian Bullseye it works with Before=network-online.target , after every reboot all iptables and ip6tables rules are loaded fine. Wonder if it's something platform dependent?