NOTE: The following guide assumes you understand UNIX.
I needed to install MiniUPNP to get NAT-PMP on DD-WRT. I did lots of research and finally found the right way to do it.
First search Google for a compatible version of OpenWRT for your router, mine being http://wiki.openwrt.org/toh/buffalo/wzr-600dhp, then look at the firmware download links for the location of the firmware, in my case http://downloads.openwrt.org/attitude_adjustment/12.09/ar71xx/generic/, then go into packages and search for miniupnpd. SSH or telnet into the router and run
wget http://downloads.openwrt.org/attitude_adjustment/12.09/ar71xx/generic/packages/miniupnpd_1.8-1_ar71xx.ipk -O /tmp/miniupnpd.ipk (replace URL with correct one for your router), then run
ipkg install /tmp/miniupnpd.ipk to install. Once you have it installed, test to verify it runs by typing miniupnpd. If it gives an error saying a library is needed, look for that library in the packages folder and possibly install the same way you installed miniupnpd.
Once miniupnpd runs properly, remove the file
vi /jffs/etc/miniupnp.conf to paste the following config, modifying for your network (I use 10.0.0.1 for my router, most dd-wrt routers are configured for 192.168.1.1).
# network interface ext_ifname=eth1 #ext_ifname=xl1 # if the WAN interface has several IP addresses, you # can specify the one to use below #ext_ip= # LAN network interfaces IPs / networks # there can be multiple listening ips for SSDP traffic. # should be under the form nnn.nnn.nnn.nnn/nn # It can also be the network interface name (ie "eth0") # It if mandatory to use the network interface name to enable IPv6 # HTTP is available on all interfaces. # When MULTIPLE_EXTERNAL_IP is enabled, the external ip # address associated with the subnet follows. for example : # listening_ip=192.168.0.1/24 22.214.171.124 #listening_ip=192.168.0.1/24 listening_ip=10.0.0.1/24 #listening_ip=eth0 # port for HTTP (descriptions and SOAP) traffic. set 0 for autoselect. port=0 # path to the unix socket used to communicate with MiniSSDPd # If running, MiniSSDPd will manage M-SEARCH answering. # default is /var/run/minissdpd.sock #minissdpdsocket=/var/run/minissdpd.sock # enable NAT-PMP support (default is no) enable_natpmp=yes # enable UPNP support (default is yes) enable_upnp=yes # configure minimal and maximal lifetime of the port mapping in seconds # 120s and 86400s (24h) are suggested values from PCP-base #min_lifetime=120 #max_lifetime=86400 # chain names for netfilter (not used for pf or ipf). # default is MINIUPNPD for both #upnp_forward_chain=forwardUPnP #upnp_nat_chain=UPnP # lease file location lease_file=/tmp/upnp.leases # name of this service, default is "`uname -s` Router" friendly_name=DD-WRT # bitrates reported by daemon in bits per second bitrate_up=1000000 bitrate_down=10000000 # "secure" mode : when enabled, UPnP client are allowed to add mappings only # to their IP. secure_mode=yes #secure_mode=no # default presentation url is http address on port 80 # If set to an empty string, no presentationURL element will appear # in the XML description of the device, which prevents MS Windows # from displaying an icon in the "Network Connections" panel. #presentation_url=http://www.mylan/index.php # report system uptime instead of daemon uptime system_uptime=yes # notify interval in seconds. default is 30 seconds. #notify_interval=240 notify_interval=60 # unused rules cleaning. # never remove any rule before this threshold for the number # of redirections is exceeded. default to 20 #clean_ruleset_threshold=10 # clean process work interval in seconds. default to 0 (disabled). # a 600 seconds (10 minutes) interval makes sense clean_ruleset_interval=600 # log packets in pf (default is no) #packet_log=no # anchor name in pf (default is miniupnpd) anchor=miniupnpd # ALTQ queue in pf # filter rules must be used for this to be used. # compile with PF_ENABLE_FILTER_RULES (see config.h file) #queue=queue_name1 # tag name in pf #tag=tag_name1 # make filter rules in pf quick or not. default is yes # active when compiled with PF_ENABLE_FILTER_RULES (see config.h file) #quickrules=no # uuid : generate your own with http://www.famkruithof.net/uuid/uuidgen uuid=a68ce000-5cf5-11e3-949a-0800200c9a66 # serial and model number the daemon will report to clients # in its XML description serial=12345678 model_number=1 # UPnP permission rules # (allow|deny) (external port range) ip/mask (internal port range) # A port range is <min port>-<max port> or <port> if there is only # one port in the range. # ip/mask format must be nn.nn.nn.nn/nn # it is advised to only allow redirection of port above 1024 # and to finish the rule set with "deny 0-65535 0.0.0.0/0 0-65535" allow 1024-65535 10.0.0.0/24 1024-65535 deny 0-65535 0.0.0.0/0 0-65535
After you write and close vi,
vi /jffs/etc/config/miniupnp.startup to add the following which will make it start up at boot.
#!/bin/sh #Wait for firewall and other services to startup. sleep 30 #Configure firewall rules for MiniUPnP /usr/sbin/iptables -t filter -N MINIUPNPD /usr/sbin/iptables -t filter -I FORWARD 4 -j MINIUPNPD /usr/sbin/iptables -t nat -N MINIUPNPD /usr/sbin/iptables -t nat -I PREROUTING 1 -j MINIUPNPD #Start MiniUPnP /jffs/usr/sbin/miniupnpd -f /jffs/etc/miniupnp.conf -d
and then run
chmod +x /jffs/etc/config/miniupnp.startup to make it executable.
To enable jffs, look at http://www.dd-wrt.com/wiki/index.php/JFFS
Be sure to disable old UPnP server on DD-WRT.
You can of course run it without rebooting to test by running the command noted above.
I used http://www.codingmonkeys.de/portmap/ to test the server.