Assuming you're running trusty ol' iptables on your Pi (i.e. you haven't replaced it with something else), run this command (either as root or with
sudo) on your Pi:
iptables -t nat -A PREROUTING -p tcp --dport 5555 -i wlan0 \
-j DNAT --to 192.168.1.2:4567
You might have to do
echo 1 > /proc/sys/net/ipv4/ip_forward before this will work, but I think that's only necessary for "regular" NAT (i.e. if you were running your Pi as your network's edge router/gateway).
This command does the following:
-t nat -A PREROUTING Without too much detail, this is where we put rules like this one
-p tcp Selects the TCP protocol
--dport 5555 Matches incoming traffic to the Pi's port 5555
-i wlan0 Matches traffic coming in on the Pi's wlan0 interface
-j DNAT Tells iptables we're doing "Destination Network Address Translation", aka "port forwarding"
--to 192.168.1.2:4567 This is the host we're forward traffic that has matched the rest of this rule to
If you want to use a different port on the Pi, just change the
--dport 5555 to whatever port you want to use; if you ever change the IP or port of your camera, change the
--to part to match.
The above rule assumes you're using a TCP protocol (e.g. HTTP(S)) to connect to the camera, an assumption I came to because you used the word "browsing", which suggests a web browser. If you're using a UDP client instead (the specs mention it supports both TCP and UDP), change the
-p tcp to
-p udp. You could even do two versions of this rule, one for TCP and one for UDP, to support both!