FreePBX on Wifi can't connect to the server

I configured wifi on FreePBX. When I run FreePBX I see wlan0 and ipv6 address. I can ping that address from other machine from the same LAN network. iwconfig: wlan0 IEEE 802.11 ESSID:"my name ssid" Mode:Managed Frequency:2.412 GHz Access Point: xx:xx:xx:xx:xx Bit Rate=86.7 Mb/s Tx-Power=22dBm Retry short limit:7 RTS thr:off Power Management:on Link Quality=40/70 Signal level=-70dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc: 19 Missed beacon:0 I called commands: dhclient -r dhclient wlan0 And when I type ifconfig I have IPv4 address assigned to wlan0. But I can't ping that address from other machine in the same LAN network. I can't connect using webbrowser too.