Hello,
Got a RB4011 acting as router and DHCP server.
The RB4011 has a script that checks the IP address for changes every five minutes.
Whenever there is a change, it updates a DynDNS.com account with the new address.
The RB4011 also has a NAT rule that forwards a couple of ports over the a security camera DVR.
My problem is that if the IP address changes, and DynDNS changes... the NAT rule still doesn't know the new address.
I attach the NAT rule, and the script below.
How can I update the NAT rule with the new IP?
=======================================
0 ;;; defconf: masquerade
chain=srcnat action=masquerade out-interface-list=WAN
ipsec-policy=out,none
1 ;;; Rangers DVR port forwarding.
chain=dstnat action=dst-nat to-addresses=10.0.0.9 protocol=tcp
dst-address=123.123.123.123 dst-port=80,443,38880,38881,38882 log=yes
log-prefix="dvr_cameras_"
=======================================
:global ddnsuser "dyndnsUSER"
:global ddnspass "PASSWORD_for_DynDNS"
:global theinterface "ether1"
:global ddnshost ourHostDomain.dyndnssite.com
:global ipddns [:resolve $ddnshost];
:global ipfresh [ /ip address get [/ip address find interface=$theinterface ] address ]
:if ([ :typeof $ipfresh ] = nil ) do={
:log info ("DynDNS: No ip address on $theinterface .")
} else={
:for i from=( [:len $ipfresh] - 1) to=0 do={
:if ( [:pick $ipfresh $i] = "/") do={
:set ipfresh [:pick $ipfresh 0 $i];
}
}
:if ($ipddns != $ipfresh) do={
:log info ("DynDNS: IP-DynDNS = $ipddns")
:log info ("DynDNS: IP-Fresh = $ipfresh")
:log info "DynDNS: Update IP needed, Sending UPDATE...!"
:global str "/nic/update\?hostname=$ddnshost&myip=$ipfresh&wildcard=NOCHG&mx=NOCHG&backmx=NOCHG"
/tool fetch address=members.dyndns.org src-path=$str mode=http user=$ddnsuser \
password=$ddnspass dst-path=("/DynDNS.".$ddnshost)
:delay 1
:global str [/file find name="DynDNS.$ddnshost"];
/file remove $str
:global ipddns $ipfresh
:log info "DynDNS: IP updated to $ipfresh!"
} else={
:log info "DynDNS: dont need changes";
}
}