This question might seem duplicate but I've tried all other solutions which are years old so please help.
I setup Pivpn on my Raspberry Pi but cannot access internet via VPN.
Running ping 1.1.1.1 -I tun0 gives 100% packet loss and no response. From eth0 it works. Even ping 127.0.0.1 -I tun0 doesn't work.
Below is my log of pivpn -d it doesn't show any error.
::: Generating Debug Output
:::: [4mPiVPN debug[0m ::::
=============================================
:::: [4mLatest commit[0m ::::
Branch: master
Commit: 027f257931d1f169e254def5d1552d55810fefda
Author: 4s3ti
Date: Thu Aug 5 15:12:33 2021 +0200
Summary: Latest Changes update.
=============================================
:::: [4mInstallation settings[0m ::::
PLAT=Raspbian
OSCN=stretch
USING_UFW=0
IPv4dev=eth0
dhcpReserv=1
IPv4addr=10.10.70.10/24
IPv4gw=10.10.70.254
install_user=pi
install_home=/home/pi
VPN=openvpn
pivpnPROTO=udp
pivpnPORT=50552
pivpnDNS1=8.8.8.8
pivpnDNS2=8.8.4.4
pivpnSEARCHDOMAIN=
pivpnHOST=REDACTED
TWO_POINT_FOUR=1
pivpnENCRYPT=256
USE_PREDEFINED_DH_PARAM=0
INPUT_CHAIN_EDITED=0
FORWARD_CHAIN_EDITED=0
pivpnDEV=tun0
pivpnNET=10.8.0.0
subnetClass=24
ALLOWED_IPS=""
UNATTUPG=0
INSTALLED_PACKAGES=(grepcidr expect)
=============================================
:::: [4mServer configuration shown below[0m ::::
dev tun
proto udp
port 50552
ca /etc/openvpn/easy-rsa/pki/ca.crt
cert /etc/openvpn/easy-rsa/pki/issued/ANY_1c949ee6-91f4-4cca-b472-e7d82dae1b44.crt
key /etc/openvpn/easy-rsa/pki/private/ANY_1c949ee6-91f4-4cca-b472-e7d82dae1b44.key
dh none
ecdh-curve prime256v1
topology subnet
server 10.3.0.0 255.255.255.0
# Set your primary domain name server address for clients
push "dhcp-option DNS 1.1.1.1"
#push "dhcp-option DNS 8.8.8.8"
# Prevent DNS leaks on Windows
push "block-outside-dns"
# Override the Client default gateway by using 0.0.0.0/1 and
# 128.0.0.0/1 rather than 0.0.0.0/0. This has the benefit of
# overriding but not wiping out the original default gateway.
push "redirect-gateway def1"
push "route 192.168.15.1 255.255.255.0"
client-to-client
client-config-dir /etc/openvpn/ccd
keepalive 15 120
remote-cert-tls client
tls-version-min 1.2
tls-crypt /etc/openvpn/easy-rsa/pki/ta.key
cipher AES-256-CBC
auth SHA256
user openvpn
group openvpn
persist-key
persist-tun
crl-verify /etc/openvpn/crl.pem
status /var/log/openvpn-status.log 20
status-version 3
syslog
verb 3
#DuplicateCNs allow access control on a less-granular, per user basis.
#Remove # if you will manage access by user instead of device.
#duplicate-cn
# Generated for use by PiVPN.io
tun-mtu 1400
mssfix 1360
=============================================
:::: [4mClient template file shown below[0m ::::
client
dev tun
proto udp
remote REDACTED 50552
resolv-retry infinite
nobind
remote-cert-tls server
tls-version-min 1.2
verify-x509-name ANY_1c949ee6-91f4-4cca-b472-e7d82dae1b44 name
cipher AES-256-CBC
auth SHA256
auth-nocache
verb 3
=============================================
:::: [4mRecursive list of files in[0m ::::
::: [4m/etc/openvpn/easy-rsa/pki shows below[0m :::
/etc/openvpn/easy-rsa/pki/:
Default.txt
ca.crt
crl.pem
ecparams
index.txt
index.txt.attr
index.txt.attr.old
index.txt.old
issued
openssl-easyrsa.cnf
private
renewed
revoked
safessl-easyrsa.cnf
serial
serial.old
ta.key
/etc/openvpn/easy-rsa/pki/ecparams:
prime256v1.pem
/etc/openvpn/easy-rsa/pki/issued:
ANY_1c949ee6-91f4-4cca-b472-e7d82dae1b44.crt
/etc/openvpn/easy-rsa/pki/private:
ANY_1c949ee6-91f4-4cca-b472-e7d82dae1b44.key
ca.key
/etc/openvpn/easy-rsa/pki/renewed:
private_by_serial
reqs_by_serial
/etc/openvpn/easy-rsa/pki/renewed/private_by_serial:
/etc/openvpn/easy-rsa/pki/renewed/reqs_by_serial:
/etc/openvpn/easy-rsa/pki/revoked:
private_by_serial
reqs_by_serial
/etc/openvpn/easy-rsa/pki/revoked/private_by_serial:
/etc/openvpn/easy-rsa/pki/revoked/reqs_by_serial:
=============================================
:::: [4mSelf check[0m ::::
:: [OK] IP forwarding is enabled
:: [OK] Iptables MASQUERADE rule set
:: [OK] OpenVPN is running
:: [OK] OpenVPN is enabled (it will automatically start on reboot)
:: [OK] OpenVPN is listening on port 50552/udp
=============================================
:::: Having trouble connecting? Take a look at the FAQ:
:::: [1mhttps://docs.pivpn.io/faq[0m
=============================================
:::: [4mSnippet of the server log[0m ::::
Aug 21 11:16:40 ANY ovpn-server[488]: ECDH curve prime256v1 added
Aug 21 11:16:40 ANY ovpn-server[488]: Outgoing Control Channel Encryption: Cipher 'AES-256-CTR' initialized with 256 bit key
Aug 21 11:16:40 ANY ovpn-server[488]: Outgoing Control Channel Encryption: Using 256 bit message hash 'SHA256' for HMAC authentication
Aug 21 11:16:40 ANY ovpn-server[488]: Incoming Control Channel Encryption: Cipher 'AES-256-CTR' initialized with 256 bit key
Aug 21 11:16:40 ANY ovpn-server[488]: Incoming Control Channel Encryption: Using 256 bit message hash 'SHA256' for HMAC authentication
Aug 21 11:16:40 ANY ovpn-server[488]: WARNING: normally if you use --mssfix and/or --fragment, you should also set --tun-mtu 1500 (currently it is 1400)
Aug 21 11:16:40 ANY ovpn-server[488]: TUN/TAP device tun0 opened
Aug 21 11:16:40 ANY ovpn-server[488]: TUN/TAP TX queue length set to 100
Aug 21 11:16:40 ANY ovpn-server[488]: do_ifconfig, tt->did_ifconfig_ipv6_setup=0
Aug 21 11:16:40 ANY ovpn-server[488]: /sbin/ip link set dev tun0 up mtu 1400
Aug 21 11:16:40 ANY ovpn-server[488]: /sbin/ip addr add dev tun0 10.3.0.1/24 broadcast 10.3.0.255
Aug 21 11:16:40 ANY ovpn-server[488]: Could not determine IPv4/IPv6 protocol. Using AF_INET
Aug 21 11:16:40 ANY ovpn-server[488]: Socket Buffers: R=[163840->163840] S=[163840->163840]
Aug 21 11:16:40 ANY ovpn-server[488]: UDPv4 link local (bound): [AF_INET][undef]:50552
Aug 21 11:16:40 ANY ovpn-server[488]: UDPv4 link remote: [AF_UNSPEC]
Aug 21 11:16:40 ANY ovpn-server[488]: GID set to openvpn
Aug 21 11:16:40 ANY ovpn-server[488]: UID set to openvpn
Aug 21 11:16:40 ANY ovpn-server[488]: MULTI: multi_init called, r=256 v=256
Aug 21 11:16:40 ANY ovpn-server[488]: IFCONFIG POOL: base=10.3.0.2 size=252, ipv6=0
Aug 21 11:16:40 ANY ovpn-server[488]: Initialization Sequence Completed
=============================================
:::: [4mDebug complete[0m ::::
:::
::: Debug output completed above.
::: Copy saved to /tmp/debug.log
:::
Running cat /proc/sys/net/ipv4/ip_forward gives 1 so forwarding is enabled.
I've ran the command sudo iptables -t nat -A POSTROUTING -s 10.3.0.0/24 -o eth0 -j MASQUERADE still doesn't work.
Please note that I've changed ip from 10.8.0.0 to 10.3.0.0 still doesn't work with both.
My openvpn version is OpenVPN 2.4.0
Well everything looks good. I suggest you reinstall pivpn from the official website here
Also, while installation select public dns and enter any public dns, you seem to be using your ip.
After reinstall and reboot, run the command sudo iptables -t nat -A POSTROUTING -s 10.3.0.0/24 -o eth0 -j MASQUERADE
Also, most importantly, using ping 1.1.1.1 -I tun0 won't work even if the VPN works so stop using it and use an actual connection.
You might want to create a statup script that runs the command sudo iptables -t nat -A POSTROUTING -s 10.3.0.0/24 -o eth0 -j MASQUERADE