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linux:openwrt [2015/06/30 15:01] – niziaklinux:openwrt [2021/03/05 14:09] (current) – niziak
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 +====== OpenWRT ======
 +
 ====== First steps ====== ====== First steps ======
 To use SSH, first telnet to router and set root password. To use SSH, first telnet to router and set root password.
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 ====== Enable SSH on WAN ====== ====== Enable SSH on WAN ======
  
 +<code bash>
 uci add firewall rule uci add firewall rule
 uci set firewall.@rule[-1].src=wan uci set firewall.@rule[-1].src=wan
Line 11: Line 14:
 uci commit firewall uci commit firewall
 /etc/init.d/firewall restart /etc/init.d/firewall restart
 +</code>
  
-====== OpenVPN ======+====== Multiple WAN IP ====== 
 +===== same provider ==== 
 +There are two method defining multiple WAN IP [[https://wiki.openwrt.org/doc/uci/network#multiple_ip_addresses]]. 
 +In both cases, addresses are added to the same interface. 
 +It is not possible to create 2nd firewall zone, like WAN2, because all iptables rules are using physical interface name to connect iptables chain, and physical interface is the same.
  
-<code bash>opkg install openvpn-openssl luci-app-openvpn openvpn-easy-rsa</code>+Better is to create second OpenWRT interface "WAN2" but assign it to firewall zone "WAN".  
 +To use other external IP firewall needs to be configured manually by: 
 +<file bash | /etc/firewall.user> 
 +iptables -A input_wan_rule -d $WAN2_NET/29 -j reject 
 +iptables -t nat -A prerouting_wan_rule -p tcp -d $WAN2_IP3 --dport 80  -j DNAT --to-destination 192.168.0.90:80  -m comment --comment "Web server"
  
-Enable incoming OpenVPN connections:+# goal is to do not pass into default WAN rules 
 +iptables -t nat -A prerouting_wan_rule -d $WAN2_NET/29 -j ACCEPT 
 +</file>
  
-<code bash> 
-uci add firewall rule 
-uci set firewall.@rule[-1]._name=openvpn 
-uci set firewall.@rule[-1].src=wan 
-uci set firewall.@rule[-1].target=ACCEPT 
-uci set firewall.@rule[-1].proto=udp 
-uci set firewall.@rule[-1].dest_port=1194 
-uci commit firewall 
  
-echo "iptables -I OUTPUT -o tap+ -j ACCEPT" >> /etc/firewall.user +====== PXE boot ======
-echo "iptables -I INPUT -i tap+ -j ACCEPT" >> /etc/firewall.user +
-echo "iptables -I FORWARD -o tap+ -j ACCEPT" >> /etc/firewall.user +
-echo "iptables -I FORWARD -i tap+ -j ACCEPT" >> /etc/firewall.user +
-</code>+
  
-<code bash> +<file | /etc/dnsmasq.conf>
-mkdir -o /etc/openvpn +
-uci set openvpn.uservpn=openvpn +
-uci set openvpn.uservpn.config=/etc/openvpn/user-vpn.conf +
-uci set openvpn.uservpn.enable=1 +
-uci commit openvpn +
-</code>+
  
-cat > /etc/openvpn/user-vpn.conf+# set tag "ENH" if request comes from iPXE ("iPXE" user class) 
 +dhcp-userclass=set:ENH,iPXE
  
-   port 1194 +# alternative way, look for option 175 
-   proto udp +#dhcp-match=set:ENH,175
-   dev tap0 +
-   keepalive 10 120 +
-   status /tmp/openvpn-status.log +
-   verb 3 +
-   secret /etc/openvpn/secret.key+
  
-Add VPN to local LAN bridge:+# UNDI 
 +dhcp-boot=tag:!ENH,netboot.xyz-undionly.kpxe,myserver,192.168.0.231
  
-<code bash> +# PXE 
-cat > /etc/init.d/openvpn-bridge +dhcp-boot=tag:ENH,netboot.xyz.kpxe,myserver,192.168.0.231 
-#!/bin/sh /etc/rc.common +</file> 
-     + 
-    START=94 + 
-     + 
-    start() { + 
-        openvpn --mktun --dev tap0 +====== Backup ====== 
-        brctl addif br-lan tap0 +[[https://wiki.openwrt.org/doc/howto/generic.backup]]
-        ifconfig tap0 0.0.0.0 promisc up +
-    } +
-                                                                                                          +
-    stop() { +
-        ifconfig tap0 0.0.0.0 down +
-        brctl delif br-lan tap0 +
-        openvpn --rmtun --dev tap0 +
-    }+
  
 +====== Periodic reboot ======
  
-chmod 755 /etc/init.d/openvpn-bridge  +===== cron job ===== 
-/etc/init.d/openvpn-bridge enable +<code> 
-/etc/init.d/openvpn-bridge start+# Reboot at 4:30am every day 
 +# Note: To avoid infinite reboot loop, wait 70 seconds 
 +# and touch a file in /etc so clock will be set 
 +# properly to 4:31 on reboot before cron starts. 
 +30 4 * * * sleep 70 && touch /etc/banner && reboot
 </code> </code>
  
-<code bash> +or independent on system time 
-openvpn --genkey --secret /etc/openvpn/secret.key+<code> 
 +30 4 * * *  [ $( cat /proc/uptime | cut -d '.' -f 1 ) -gt 3600 ] && reboot
 </code> </code>
  
-Start VPN:+===== watchcat =====
 <code bash> <code bash>
-/etc/init.d/openvpn enable +opkg install watchcat luci-app-watchcat
-/etc/init.d/openvpn start+
 </code> </code>
 +
 +And ''luci'' menu will be available under ''Services''
 +
 +====== Issues ======
 +Problem: Port-forwarded traffic are always from router local IP instead of real external IP address.
 +Solution: Disable masq option for LAN zone (should be only on WAN) zone
 +