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I have a pretty much out of the box setup of openwrt, though I followed the 'securing your router guide', so password set, ssh on different port (so security through obscurity). However, I see some odd IP address connected to the WAN interface:
root@OpenWrt:~# cat /proc/net/arp
IP address HW type Flags HW address Mask Device
192.168.1.67 0x1 0x0 00:00:00:00:00:00 * eth0.2
192.168.1.115 0x1 0x0 00:00:00:00:00:00 * eth0.2
192.168.1.4 0x1 0x0 00:00:00:00:00:00 * eth0.2
192.168.1.1 0x1 0x2 00:1f:90:XX:XX:XX * eth0.2
...
I know 192.168.1.1 is my ISPs router which I connect my OpenWRT router to, but I'm unsure what the others are. Also they have a weird MAC address. Does anyone know what that might be? My set top box has a 192.168.1 address but it is not one of these currently one of these. Could it be that it has been assigned different IP addresses at different times and ended up in my ARP table?
I'm using BARRIER BREAKER (14.07-rc3, r42056)
Thanks. Key bit of information doing the ping. Worked exactly as you'd described. – rainkinz – 2014-10-07T15:19:57.927