I installed Openvpn in my server which already had UFW installed
i enabled ip forward in
applied changes using
I also enabled forwarding using
echo 1 > /proc/sys/net/ipv4/ip_forward
frowarding using ip table
iptables -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT iptables -A FORWARD -s 10.8.0.0/24 -j ACCEPT iptables -A FORWARD -j REJECT iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -o eth0 -j MASQUERADE
ufw allow 1194/udp ufw allow 1194/tcp
I restarted server, openvpn and all but client doesn't connect but if i disable ufw using
ufw disable connection is successful.
below is content of
# /etc/default/ufw # # Set to yes to apply rules to support IPv6 (no means only IPv6 on loopback # accepted). You will need to 'disable' and then 'enable' the firewall for # the changes to take affect. IPV6=yes # Set the default input policy to ACCEPT, DROP, or REJECT. Please note that if # you change this you will most likely want to adjust your rules. DEFAULT_INPUT_POLICY="DROP" # Set the default output policy to ACCEPT, DROP, or REJECT. Please note that if # you change this you will most likely want to adjust your rules. DEFAULT_OUTPUT_POLICY="ACCEPT" # Set the default forward policy to ACCEPT, DROP or REJECT. Please note that # if you change this you will most likely want to adjust your rules DEFAULT_FORWARD_POLICY="ACCEPT" # Set the default application policy to ACCEPT, DROP, REJECT or SKIP. Please # note that setting this to ACCEPT may be a security risk. See 'man ufw' for # details DEFAULT_APPLICATION_POLICY="SKIP" # By default, ufw only touches its own chains. Set this to 'yes' to have ufw # manage the built-in chains too. Warning: setting this to 'yes' will break # non-ufw managed firewall rules MANAGE_BUILTINS=no # # IPT backend # # only enable if using iptables backend IPT_SYSCTL=/etc/ufw/sysctl.conf # Extra connection tracking modules to load. Complete list can be found in # net/netfilter/Kconfig of your kernel source. Some common modules: # nf_conntrack_irc, nf_nat_irc: DCC (Direct Client to Client) support # nf_conntrack_netbios_ns: NetBIOS (samba) client support # nf_conntrack_pptp, nf_nat_pptp: PPTP over stateful firewall/NAT # nf_conntrack_ftp, nf_nat_ftp: active FTP support # nf_conntrack_tftp, nf_nat_tftp: TFTP support (server side) IPT_MODULES="nf_conntrack_ftp nf_nat_ftp nf_conntrack_netbios_ns"
below is content of
# # rules.before # # Rules that should be run before the ufw command line added rules. Custom # rules should be added to one of these chains: # ufw-before-input # ufw-before-output # ufw-before-forward # # START OPENVPN RULES # NAT table rules *nat :POSTROUTING ACCEPT [0:0] # Allow traffic from OpenVPN client to eth0 -A POSTROUTING -s 10.8.0.0/24 -o eth0 -j MASQUERADE COMMIT # END OPENVPN RULES . . . #openvpn -A ufw-before-input -i tun+ -j ACCEPT -A ufw-before-output -i tun+ -j ACCEPT -A ufw-before-forward -s 10.8.0.0/24 -j ACCEPT -A ufw-before-forward -d 10.8.0.0/24 -j ACCEPT # don't delete the 'COMMIT' line or these rules won't be processed COMMIT