Cannot ping wifi connected devices on our T3200m network

[wireless]

Having issues with wifi printer, NAS, file/screen sharing between computers on LAN. I even have issues connecting to T3200m router admin page from (http://192.168.1.254/index.html) wifi connected computer at times.

I tried pinging a wifi-connected-PC's IP with no luck, but when I plugged a LAN cable into it then I could ping it:


mbp:~ edmiidz$ ping 192.168.1.82
PING 192.168.1.82 (192.168.1.82): 56 data bytes
Request timeout for icmp_seq 0
Request timeout for icmp_seq 1
Request timeout for icmp_seq 2
^C
--- 192.168.1.82 ping statistics ---
4 packets transmitted, 0 packets received, 100.0% packet loss
mbp:~ edmiidz$ ping 192.168.1.65
PING 192.168.1.65 (192.168.1.65): 56 data bytes
64 bytes from 192.168.1.65: icmp_seq=0 ttl=128 time=5.049 ms
64 bytes from 192.168.1.65: icmp_seq=1 ttl=128 time=4.596 ms
64 bytes from 192.168.1.65: icmp_seq=2 ttl=128 time=4.638 ms
^C
--- 192.168.1.65 ping statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 4.596/4.761/5.049/0.204 ms

Tried changing the Firewall Security Level from NAT Only to Low, but that didn't help.


More... (https://forum.telus.com/t5/Internet-TV-Home-Phone/Cannot-ping-wifi-connected-devices-on-our-T3200m-network/m-p/79292#M13979)