OK. To make sure my files weren’t fudged somehow I’ve reinstalled OSMC alpha 4 on the Pi 2.
I was surprised to discover that under /etc/network there wasn’t any interfaces file. I have the router to manually allocate an ip address to the pi wifi (EW-7811n) so perhaps that’s why I can get ssh via wifi with ease. Also, ir raises questions as to whether the interfaces file in /etc/network actually does anything. Allocating a static IP for eth0 doesn’t work, I have to do it manually all the time.
I also notices that iptables command wasn’t installed, had to install it manually. Does the pre-up iptables command also requires some sort of installation?
The ip addr command also had to be manually installed. So it seems that there are a few commands that need manually installation. I may be missing some to get it all to work or perhaps /etc/network/interfaces file doesn’t do anything.
Regarding your outputs, sysctl returns net.ipv4.ip_forward = 1. From the pi, ping 192.168.2.2 and ping 192.168.15.1 both work fine there’s no packet loss. TV has a manual IP set for ethernet so in theory it should work.
netstat -rn output
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
0.0.0.0 192.168.15.1 0.0.0.0 UG 0 0 0 wlan0
192.168.2.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
192.168.15.0 0.0.0.0 255.255.255.0 U 0 0 0 wlan0
192.168.15.1 0.0.0.0 255.255.255.255 UH 0 0 0 wlan0
iptables -v -L output
Chain INPUT (policy ACCEPT 366 packets, 36259 bytes)
pkts bytes target prot opt in out source destination
Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
0 0 ACCEPT all -- eth0 wlan0 anywhere anywhere
0 0 ACCEPT all -- wlan0 eth0 anywhere anywhere state RELATED,ESTABLISHED
Chain OUTPUT (policy ACCEPT 220 packets, 25304 bytes)
pkts bytes target prot opt in out source destination
iptables -t nat -v -L output
Chain PREROUTING (policy ACCEPT 9 packets, 2048 bytes)
pkts bytes target prot opt in out source destination
Chain INPUT (policy ACCEPT 9 packets, 2048 bytes)
pkts bytes target prot opt in out source destination
Chain OUTPUT (policy ACCEPT 50 packets, 4245 bytes)
pkts bytes target prot opt in out source destination
Chain POSTROUTING (policy ACCEPT 9 packets, 524 bytes)
pkts bytes target prot opt in out source destination
110 9004 SNAT all -- any wlan0 anywhere anywhere to:192.168.15.6
0 0 SNAT all -- any wlan0 anywhere anywhere to:192.168.15.6
The eth0 tcpdump on the pi and ping from laptop returns
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes
^C
0 packets captured
0 packets received by filter
0 packets dropped by kernel
However, other times it returned
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes
^C20:15:58.071481 IP Brunos-MacBook-Pro.local > osmc.local: ICMP host 192.168.2.11 unreachable, length 36
1 packet captured
2 packets received by filter
1 packet dropped by kernel
The wlan0 tcpdump returns
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on wlan0, link-type EN10MB (Ethernet), capture size 262144 bytes
^C
0 packets captured
0 packets received by filter
0 packets dropped by kernel
1 packet dropped by interface
On all occasions I have to halt the tcpdump on the pi with ctrl+C.
So, overall perhaps interfaces file doesn’t do anything. I have to setup eth0 IP address and iptables manually after rebooting. Somehow the routing is perhaps controlled by another file/command which I’m not sure about or maybe I’m missing some commands which are not included in the default OSMC installation.
