Wireless printer connected to Raspberry Pi running iptables
My Setup:
I have a Raspberry Pi set up as an access point using hostapd and dnsmasq
I've got an Android tablet connected and a Samsung wireless printer.
I have iptables running on the Raspberry Pi with strict rules allowing
only certain types of traffic. iptables is set to drop all traffic on the
FORWARD chain (I did enable IPv4 Forwarding in the kernel, however I'm
unsure if it persisted across reboots).
The Issue
If I restrict the firewall rules so that it only allows incoming and
outgoing SSH traffic (to allow me to manage the Raspberry Pi) the Samsung
Print App still can find, connect to and print to the printer.
Using tshark I managed to find that the printer uses the Raw TCP/IP
Printing Protocol, SSDP and mDNS. So unless I'm overlooking something
(which I must be) I cannot see how the tablet and printer are
communicating.
Any ideas on what could be going on?
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