3
- UPNP/DLNA discovery service (only client-to-server path is multicast)
4
239.255.255.250, port: 1900
8
- Static or dynamic routing service is required, e.g. 'smcroute'. The routing should be explicitely set
9
in the configuration, /etc/smcroute.conf
12
mroute from eth0 group 239.255.255.250 to wlan0
14
- Multicast packets has ttl=1 by default. For this route there should be a rule on multicast
15
router to increment ttl in PREROUTING rule
16
iptables -t mangle -A PREROUTING -i eth0 -d 239.255.255.250 -j TTL --ttl-inc 1
19
* Check that multicast is enabled on corresponding interfaces
20
ip link | grep MULTICAST
22
ip link set dev lo multicast on
24
* Multicast pings are only answered only if 'broadcast' icmp is allowed (this is not needed for service
26
echo 0 > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts