Using FreePBX 13.0.196.2… I noticed that freepbx is sending non-stop packets to one of my yealink t48g phones. The phone is doing nothing. It’s on hook. Not sure how to figure out that is going on. Here is a sample packet capture. The system and phone is working fine otherwise. I have 10’s of these t48g’s and this is the only one doing it. Can anyone tell me what is happening?
(edit - even with the phone powered off freepbx is still sending packets non-stop to it’s ip address)
(edit2 - I ran lsof on that port and here is what I get…)
[root@freepbx ~]# lsof -i UDP:14124
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
asterisk 3088 asterisk 62u IPv6 134120268 0t0 UDP *:14124
process 3088
asterisk 3088 5.0 1.1 5393576 192820 ? Sl 2018 15650:42 /usr/sbin/asterisk -f -U asterisk -G asterisk -vvvg -c
top shows
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
3088 asterisk 20 0 5267m 188m 11m S 2.6 1.2 15652:06 asterisk
packet capture
09:29:58.122175 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 200)
freepbx.rmtohio.com.14124 > phone418.rmtohio.com.12212: [bad udp cksum 81e4!] UDP, length 172
0x0000: 0036 7622 1917 d8d3 85b3 4d2c 0800 4500 .6v"......M,..E.
0x0010: 00c8 0000 4000 4011 214c 0a00 0203 0a00 ....@.@.!L......
0x0020: 02d7 372c 2fb4 00b4 199f 8000 2ba2 5a52 ..7,/.......+.ZR
0x0030: 64d8 0450 118e ffff ffff ffff ffff ffff d..P............
0x0040: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x0050: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x0060: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x0070: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x0080: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x0090: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x00a0: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x00b0: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x00c0: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x00d0: ffff ffff ffff ......
09:29:58.142178 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 200)
freepbx.rmtohio.com.14124 > phone418.rmtohio.com.12212: [bad udp cksum e0e3!] UDP, length 172
0x0000: 0036 7622 1917 d8d3 85b3 4d2c 0800 4500 .6v"......M,..E.
0x0010: 00c8 0000 4000 4011 214c 0a00 0203 0a00 ....@.@.!L......
0x0020: 02d7 372c 2fb4 00b4 199f 8000 2ba3 5a52 ..7,/.......+.ZR
0x0030: 6578 0450 118e ffff ffff ffff ffff ffff ex.P............
0x0040: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x0050: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x0060: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x0070: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x0080: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x0090: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x00a0: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x00b0: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x00c0: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x00d0: ffff ffff ffff ......
09:29:58.162186 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 200)
freepbx.rmtohio.com.14124 > phone418.rmtohio.com.12212: [bad udp cksum 3fe3!] UDP, length 172
0x0000: 0036 7622 1917 d8d3 85b3 4d2c 0800 4500 .6v"......M,..E.
0x0010: 00c8 0000 4000 4011 214c 0a00 0203 0a00 ....@.@.!L......
0x0020: 02d7 372c 2fb4 00b4 199f 8000 2ba4 5a52 ..7,/.......+.ZR
0x0030: 6618 0450 118e ffff ffff ffff ffff ffff f..P............
0x0040: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x0050: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x0060: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x0070: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x0080: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x0090: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x00a0: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x00b0: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x00c0: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x00d0: ffff ffff ffff ......
09:29:58.182179 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 200)
freepbx.rmtohio.com.14124 > phone418.rmtohio.com.12212: [bad udp cksum 9ee2!] UDP, length 172
0x0000: 0036 7622 1917 d8d3 85b3 4d2c 0800 4500 .6v"......M,..E.
0x0010: 00c8 0000 4000 4011 214c 0a00 0203 0a00 ....@.@.!L......
0x0020: 02d7 372c 2fb4 00b4 199f 8000 2ba5 5a52 ..7,/.......+.ZR
0x0030: 66b8 0450 118e ffff ffff ffff ffff ffff f..P............
0x0040: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x0050: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x0060: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x0070: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x0080: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x0090: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x00a0: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x00b0: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x00c0: ffff ffff ffff ffff ffff ffff ffff ffff ................
0x00d0: ffff ffff ffff ......