coTURN unable to do a handshake in Mozilla Firefox

Question

I have a web and standalone applications that use WebRTC. I have my own coturn server on Amazon EC2. I configure everything based on that article (maybe it was a mistake?). I test my apps with this stun/turn server and everything works just fine for Chrome, Edge, Safari, but does not work for Mozilla Firefox (Offer and Answer were generated). I received the following error in a console:

ICE failed, your TURN server appears to be broken, see about:webrtc for more details

I assume that I misconfigure something, so this is why it doesn't work. EC2 machine I used:

2x private IP,
2x public IP (Elastic IP),
tier: T2.micro,
UDP/TCP ports are open.

Configuration of coturn (/etc/turnserver.conf file):

listening-ip=0.0.0.0
external-ip={publicIP}:{privateIP}
external-port=3478
fingerprint
realm={publicIP}
lt-cred-mech
user={username}:{password}
log-file=/var/tmp/turn.log
verbose

Stun/Turn server configuration in a code:

RTCConfiguration.Create([|
      RTCIceServer.Create([|
          "stun:{publicIP}:3478"
          "turn:{publicIP}:3478"
        |], {userName}, {password}, RTCIceCredentialType.Password)
    |])

And the transport policy set to all.

And the whole turn.log for only this request from Mozilla:

0: log file opened: /var/tmp/turn_2020-04-03.log
0: pid file created: /var/run/turnserver.pid
0: IO method (main listener thread): epoll (with changelist)
0: WARNING: I cannot support STUN CHANGE_REQUEST functionality because only one IP address is provided
0: Wait for relay ports initialization...
0:   relay 0.0.0.0 initialization...
0:   relay 0.0.0.0 initialization done
0: Relay ports initialization done
0: IO method (general relay thread): epoll (with changelist)
0: turn server id=1 created
0: IPv4. SCTP listener opened on : 0.0.0.0:3478
0: IPv4. TCP listener opened on : 0.0.0.0:3478
0: IO method (general relay thread): epoll (with changelist)
0: turn server id=0 created
0: IPv4. TCP listener opened on : 0.0.0.0:3478
0: IPv4. UDP listener opened on: 0.0.0.0:3478
0: Total General servers: 2
0: IO method (admin thread): epoll (with changelist)
0: IO method (auth thread): epoll (with changelist)
0: IO method (auth thread): epoll (with changelist)
0: SQLite DB connection success: /var/lib/turn/turndb
20: handle_udp_packet: New UDP endpoint: local addr 0.0.0.0:3478, remote addr {remoteIP}:59148
20: session 001000000000000001: realm <{publicIP}> user <>: incoming packet BINDING processed, success
20: handle_udp_packet: New UDP endpoint: local addr 0.0.0.0:3478, remote addr {remoteIP}:49200
20: session 001000000000000002: realm <{publicIP}> user <>: incoming packet message processed, error 401: Unauthorized
21: IPv4. Local relay addr: {privateIP}:15158
21: session 001000000000000002: new, realm=<{publicIP}>, username=<{username}>, lifetime=600
21: session 001000000000000002: realm <{publicIP}> user <{username}>: incoming packet ALLOCATE processed, success
48: handle_udp_packet: New UDP endpoint: local addr 0.0.0.0:3478, remote addr {remoteIP}:62186
48: session 001000000000000003: realm <{publicIP}> user <{username}>: incoming packet message processed, error 438: Wrong nonce
48: session 001000000000000003: realm <{publicIP}> user <{username}>: incoming packet REFRESH processed, error 437: Invalid allocation
48: session 001000000000000003: realm <{publicIP}> user <{username}>: incoming packet message processed, error 437: Invalid allocation
61: handle_udp_packet: New UDP endpoint: local addr 0.0.0.0:3478, remote addr {remoteIP}:49582
61: session 001000000000000004: realm <{publicIP}> user <{username}>: incoming packet message processed, error 438: Wrong nonce
61: session 001000000000000004: realm <{publicIP}> user <{username}>: incoming packet REFRESH processed, error 437: Invalid allocation
61: session 001000000000000004: realm <{publicIP}> user <{username}>: incoming packet message processed, error 437: Invalid allocation
66: session 001000000000000004: realm <{publicIP}> user <{username}>: incoming packet CREATE_PERMISSION processed, success
66: session 001000000000000004: realm <{publicIP}> user <{username}>: incoming packet message processed, error 400: Bad Request

and logs from about:webrtc:

/builds/worker/workspace/build/src/media/mtransport/third_party/nICEr/src/net/nr_socket_multi_tcp.c:173 function nr_socket_multi_tcp_create_stun_server_socket skipping UDP STUN server(addr:IP4:{localIP}:3478/UDP)

/builds/worker/workspace/build/src/media/mtransport/third_party/nICEr/src/net/nr_socket_multi_tcp.c:173 function nr_socket_multi_tcp_create_stun_server_socket skipping UDP STUN server(addr:IP4:{localIP}:3478/UDP)

/builds/worker/workspace/build/src/media/mtransport/third_party/nICEr/src/net/nr_socket_multi_tcp.c:617 function nr_socket_multi_tcp_listen failed with error 3

ICE(PC:21372137213721372 (id=214741111111 url=http://someurl)): failed to create passive TCP host candidate: 3

STUN-CLIENT(srflx(IP4:192.168.0.50:54084/UDP|IP4:{localIP}:3478/UDP)): Timed out

ICE(PC:21372137213721372 (id=214741111111 url=http://someurl))/CAND(srflx(IP4:192.168.0.50:54084/UDP|IP4:{localIP}:3478/UDP)): failed to initialize, 2 remaining

STUN-CLIENT(relay(IP4:192.168.0.50:54084/UDP|IP4:{localIP}:3478/UDP)::TURN): Timed out

TURN(relay(IP4:192.168.0.50:54084/UDP|IP4:{localIP}:3478/UDP)): mode 20, nr_turn_client_error_cb

TURN(relay(IP4:192.168.0.50:54084/UDP|IP4:{localIP}:3478/UDP)) failed

TURN(relay(IP4:192.168.0.50:54084/UDP|IP4:{localIP}:3478/UDP)): cancelling

ICE-CANDIDATE(relay(IP4:192.168.0.50:54084/UDP|IP4:{localIP}:3478/UDP)): nr_turn_allocated_cb called with state 4

ICE-CANDIDATE(relay(IP4:192.168.0.50:54084/UDP|IP4:{localIP}:3478/UDP)): nr_turn_allocated_cb failed

ICE(PC:21372137213721372 (id=214741111111 url=http://someurl))/CAND(srflx(IP4:192.168.0.50:54084/UDP|IP4:{localIP}:3478/UDP)): failed to initialize, 1 remaining

ICE(PC:21372137213721372 (id=214741111111 url=http://someurl))/CAND(relay(IP4:192.168.0.50:54084/UDP|IP4:{localIP}:3478/UDP)): failed to initialize, 0 remaining

ICE(PC:21372137213721372 (id=214741111111 url=http://someurl)): All candidates initialized

ICE(PC:21372137213721372 (id=214741111111 url=http://someurl)): peer (PC:21372137213721372 (id=214741111111 url=http://someurl):default) has no stream matching stream PC:21372137213721372 (id=214741111111 url=http://someurl) transport-id=transport_0 - 72a938a6:f1234561cb2blablabla0dc711160ac

ICE(PC:21372137213721372 (id=214741111111 url=http://someurl)): peer (PC:21372137213721372 (id=214741111111 url=http://someurl):default) no such component for candidate candidate:foundation 2 udp 2130706431 10.0.22.10 64477 typ host generation 0

ICE(PC:21372137213721372 (id=214741111111 url=http://someurl)): peer (PC:21372137213721372 (id=214741111111 url=http://someurl):default) no such component for candidate candidate:foundation 2 udp 2130706431 160.21.130.15 64478 typ host generation 0

ICE(PC:21372137213721372 (id=214741111111 url=http://someurl)): peer (PC:21372137213721372 (id=214741111111 url=http://someurl):default) no such component for candidate candidate:foundation 2 udp 1694498815 10.20.44.17 59873 typ srflx raddr 0.0.0.0 rport 64479 generation 0

ICE(PC:21372137213721372 (id=214741111111 url=http://someurl)): peer (PC:21372137213721372 (id=214741111111 url=http://someurl):default) no such component for candidate candidate:foundation 2 udp 16777215 {publicIP} 14332 typ relay raddr 0.0.0.0 rport 64480 generation 0

ICE-PEER(PC:21372137213721372 (id=214741111111 url=http://someurl):default)/CAND-PAIR(AUgV): setting pair to state FROZEN: AUgV|IP4:192.168.0.50:54084/UDP|IP4:10.0.22.10:64477/UDP(host(IP4:192.168.0.50:54084/UDP)|candidate:foundation 1 udp 2130706431 10.0.22.10 64477 typ host generation 0)

ICE(PC:21372137213721372 (id=214741111111 url=http://someurl))/CAND-PAIR(AUgV): Pairing candidate IP4:192.168.0.50:54084/UDP (7e7f00ff):IP4:10.0.22.10:64477/UDP (7effffff) priority=9115005270299246590 (7e7f00fffdfffffe)

ICE-PEER(PC:21372137213721372 (id=214741111111 url=http://someurl):default)/CAND-PAIR(LRw8): setting pair to state FROZEN: LRw8|IP4:192.168.0.50:54084/UDP|IP4:160.21.130.15:64478/UDP(host(IP4:192.168.0.50:54084/UDP)|candidate:foundation 1 udp 2130706431 160.21.130.15 64478 typ host generation 0)

ICE(PC:21372137213721372 (id=214741111111 url=http://someurl))/CAND-PAIR(LRw8): Pairing candidate IP4:192.168.0.50:54084/UDP (7e7f00ff):IP4:160.21.130.15:64478/UDP (7effffff) priority=9115005270299246590 (7e7f00fffdfffffe)

ICE-PEER(PC:21372137213721372 (id=214741111111 url=http://someurl):default)/CAND-PAIR(uAK4): setting pair to state FROZEN: uAK4|IP4:192.168.0.50:54084/UDP|IP4:10.20.44.17:59873/UDP(host(IP4:192.168.0.50:54084/UDP)|candidate:foundation 1 udp 1694498815 10.20.44.17 59873 typ srflx raddr 0.0.0.0 rport 64479 generation 0)

ICE(PC:21372137213721372 (id=214741111111 url=http://someurl))/CAND-PAIR(uAK4): Pairing candidate IP4:192.168.0.50:54084/UDP (7e7f00ff):IP4:10.20.44.17:59873/UDP (64ffffff) priority=7277816997780259327 (64fffffffcfe01ff)

ICE-PEER(PC:21372137213721372 (id=214741111111 url=http://someurl):default)/CAND-PAIR(ZzTX): setting pair to state FROZEN: ZzTX|IP4:192.168.0.50:54084/UDP|IP4:{publicIP}:14332/UDP(host(IP4:192.168.0.50:54084/UDP)|candidate:foundation 1 udp 16777215 {publicIP} 14332 typ relay raddr 0.0.0.0 rport 64480 generation 0)

ICE(PC:21372137213721372 (id=214741111111 url=http://someurl))/CAND-PAIR(ZzTX): Pairing candidate IP4:192.168.0.50:54084/UDP (7e7f00ff):IP4:{publicIP}:14332/UDP (ffffff) priority=72057593987465727 (fffffffcfe01ff)

ICE-PEER(PC:21372137213721372 (id=214741111111 url=http://someurl):default)/CAND-PAIR(AUgV): setting pair to state WAITING: AUgV|IP4:192.168.0.50:54084/UDP|IP4:10.0.22.10:64477/UDP(host(IP4:192.168.0.50:54084/UDP)|candidate:foundation 1 udp 2130706431 10.0.22.10 64477 typ host generation 0)

ICE-PEER(PC:21372137213721372 (id=214741111111 url=http://someurl):default)/ICE-STREAM(PC:21372137213721372 (id=214741111111 url=http://someurl) transport-id=transport_0 - 72a938a6:f1234561cb2blablabla0dc711160ac): Starting check timer for stream.

ICE-PEER(PC:21372137213721372 (id=214741111111 url=http://someurl):default)/CAND-PAIR(AUgV): setting pair to state IN_PROGRESS: AUgV|IP4:192.168.0.50:54084/UDP|IP4:10.0.22.10:64477/UDP(host(IP4:192.168.0.50:54084/UDP)|candidate:foundation 1 udp 2130706431 10.0.22.10 64477 typ host generation 0)

ICE(PC:21372137213721372 (id=214741111111 url=http://someurl)): peer (PC:21372137213721372 (id=214741111111 url=http://someurl):default) is now checking

ICE(PC:21372137213721372 (id=214741111111 url=http://someurl)): peer (PC:21372137213721372 (id=214741111111 url=http://someurl):default) no streams with pre-answer requests

ICE-PEER(PC:21372137213721372 (id=214741111111 url=http://someurl):default)/CAND-PAIR(LRw8): setting pair to state WAITING: LRw8|IP4:192.168.0.50:54084/UDP|IP4:160.21.130.15:64478/UDP(host(IP4:192.168.0.50:54084/UDP)|candidate:foundation 1 udp 2130706431 160.21.130.15 64478 typ host generation 0)

ICE-PEER(PC:21372137213721372 (id=214741111111 url=http://someurl):default)/CAND-PAIR(LRw8): setting pair to state IN_PROGRESS: LRw8|IP4:192.168.0.50:54084/UDP|IP4:160.21.130.15:64478/UDP(host(IP4:192.168.0.50:54084/UDP)|candidate:foundation 1 udp 2130706431 160.21.130.15 64478 typ host generation 0)

ICE-PEER(PC:21372137213721372 (id=214741111111 url=http://someurl):default)/CAND-PAIR(uAK4): setting pair to state WAITING: uAK4|IP4:192.168.0.50:54084/UDP|IP4:10.20.44.17:59873/UDP(host(IP4:192.168.0.50:54084/UDP)|candidate:foundation 1 udp 1694498815 10.20.44.17 59873 typ srflx raddr 0.0.0.0 rport 64479 generation 0)

ICE-PEER(PC:21372137213721372 (id=214741111111 url=http://someurl):default)/CAND-PAIR(uAK4): setting pair to state IN_PROGRESS: uAK4|IP4:192.168.0.50:54084/UDP|IP4:10.20.44.17:59873/UDP(host(IP4:192.168.0.50:54084/UDP)|candidate:foundation 1 udp 1694498815 10.20.44.17 59873 typ srflx raddr 0.0.0.0 rport 64479 generation 0)

ICE-PEER(PC:21372137213721372 (id=214741111111 url=http://someurl):default)/CAND-PAIR(ZzTX): setting pair to state WAITING: ZzTX|IP4:192.168.0.50:54084/UDP|IP4:{publicIP}:14332/UDP(host(IP4:192.168.0.50:54084/UDP)|candidate:foundation 1 udp 16777215 {publicIP} 14332 typ relay raddr 0.0.0.0 rport 64480 generation 0)

ICE-PEER(PC:21372137213721372 (id=214741111111 url=http://someurl):default)/CAND-PAIR(ZzTX): setting pair to state IN_PROGRESS: ZzTX|IP4:192.168.0.50:54084/UDP|IP4:{publicIP}:14332/UDP(host(IP4:192.168.0.50:54084/UDP)|candidate:foundation 1 udp 16777215 {publicIP} 14332 typ relay raddr 0.0.0.0 rport 64480 generation 0)

ICE-PEER(PC:21372137213721372 (id=214741111111 url=http://someurl):default): no FROZEN/WAITING pairs for PC:21372137213721372 (id=214741111111 url=http://someurl) transport-id=transport_0 - 72a938a6:f1234561cb2blablabla0dc711160ac

ICE(PC:21372137213721372 (id=214741111111 url=http://someurl)): peer (PC:21372137213721372 (id=214741111111 url=http://someurl):default) Trickle grace period is over; marking every component with only failed pairs as failed.

STUN-CLIENT(AUgV|IP4:192.168.0.50:54084/UDP|IP4:10.0.22.10:64477/UDP(host(IP4:192.168.0.50:54084/UDP)|candidate:foundation 1 udp 2130706431 10.0.22.10 64477 typ host generation 0)): Timed out

ICE-PEER(PC:21372137213721372 (id=214741111111 url=http://someurl):default)/CAND-PAIR(AUgV): setting pair to state FAILED: AUgV|IP4:192.168.0.50:54084/UDP|IP4:10.0.22.10:64477/UDP(host(IP4:192.168.0.50:54084/UDP)|candidate:foundation 1 udp 2130706431 10.0.22.10 64477 typ host generation 0)

STUN-CLIENT(LRw8|IP4:192.168.0.50:54084/UDP|IP4:160.21.130.15:64478/UDP(host(IP4:192.168.0.50:54084/UDP)|candidate:foundation 1 udp 2130706431 160.21.130.15 64478 typ host generation 0)): Timed out

ICE-PEER(PC:21372137213721372 (id=214741111111 url=http://someurl):default)/CAND-PAIR(LRw8): setting pair to state FAILED: LRw8|IP4:192.168.0.50:54084/UDP|IP4:160.21.130.15:64478/UDP(host(IP4:192.168.0.50:54084/UDP)|candidate:foundation 1 udp 2130706431 160.21.130.15 64478 typ host generation 0)

STUN-CLIENT(uAK4|IP4:192.168.0.50:54084/UDP|IP4:10.20.44.17:59873/UDP(host(IP4:192.168.0.50:54084/UDP)|candidate:foundation 1 udp 1694498815 10.20.44.17 59873 typ srflx raddr 0.0.0.0 rport 64479 generation 0)): Timed out

ICE-PEER(PC:21372137213721372 (id=214741111111 url=http://someurl):default)/CAND-PAIR(uAK4): setting pair to state FAILED: uAK4|IP4:192.168.0.50:54084/UDP|IP4:10.20.44.17:59873/UDP(host(IP4:192.168.0.50:54084/UDP)|candidate:foundation 1 udp 1694498815 10.20.44.17 59873 typ srflx raddr 0.0.0.0 rport 64479 generation 0)

STUN-CLIENT(ZzTX|IP4:192.168.0.50:54084/UDP|IP4:{publicIP}:14332/UDP(host(IP4:192.168.0.50:54084/UDP)|candidate:foundation 1 udp 16777215 {publicIP} 14332 typ relay raddr 0.0.0.0 rport 64480 generation 0)): Timed out

ICE-PEER(PC:21372137213721372 (id=214741111111 url=http://someurl):default)/CAND-PAIR(ZzTX): setting pair to state FAILED: ZzTX|IP4:192.168.0.50:54084/UDP|IP4:{publicIP}:14332/UDP(host(IP4:192.168.0.50:54084/UDP)|candidate:foundation 1 udp 16777215 {publicIP} 14332 typ relay raddr 0.0.0.0 rport 64480 generation 0)

ICE-PEER(PC:21372137213721372 (id=214741111111 url=http://someurl):default)/STREAM(PC:21372137213721372 (id=214741111111 url=http://someurl) transport-id=transport_0 - 72a938a6:f1234561cb2blablabla0dc711160ac)/COMP(1): All pairs are failed, and grace period has elapsed. Marking component as failed.

ICE(PC:21372137213721372 (id=214741111111 url=http://someurl))/STREAM(PC:21372137213721372 (id=214741111111 url=http://someurl) transport-id=transport_0 - 72a938a6:f1234561cb2blablabla0dc711160ac): state dump

ICE(PC:21372137213721372 (id=214741111111 url=http://someurl))/ICE-STREAM(PC:21372137213721372 (id=214741111111 url=http://someurl) transport-id=transport_0 - 72a938a6:f1234561cb2blablabla0dc711160ac): Local component 1 - dumping candidates

ICE(PC:21372137213721372 (id=214741111111 url=http://someurl))/ICE-STREAM(PC:21372137213721372 (id=214741111111 url=http://someurl) transport-id=transport_0 - 72a938a6:f1234561cb2blablabla0dc711160ac)/CAND(EJ0l): host(IP4:192.168.0.50:54084/UDP)

ICE(PC:21372137213721372 (id=214741111111 url=http://someurl))/ICE-STREAM(PC:21372137213721372 (id=214741111111 url=http://someurl) transport-id=transport_0 - 72a938a6:f1234561cb2blablabla0dc711160ac)/CAND(5pC7): srflx(IP4:192.168.0.50:54084/UDP|IP4:{localIP}:3478/UDP)

ICE(PC:21372137213721372 (id=214741111111 url=http://someurl))/ICE-STREAM(PC:21372137213721372 (id=214741111111 url=http://someurl) transport-id=transport_0 - 72a938a6:f1234561cb2blablabla0dc711160ac)/CAND(5pC7): srflx(IP4:192.168.0.50:54084/UDP|IP4:{localIP}:3478/UDP)

ICE(PC:21372137213721372 (id=214741111111 url=http://someurl))/ICE-STREAM(PC:21372137213721372 (id=214741111111 url=http://someurl) transport-id=transport_0 - 72a938a6:f1234561cb2blablabla0dc711160ac)/CAND(0hfs): relay(IP4:192.168.0.50:54084/UDP|IP4:{localIP}:3478/UDP)

ICE(PC:21372137213721372 (id=214741111111 url=http://someurl))/ICE-STREAM(PC:21372137213721372 (id=214741111111 url=http://someurl) transport-id=transport_0 - 72a938a6:f1234561cb2blablabla0dc711160ac)/CAND(HrQP): host(IP4:192.168.0.50:50811/TCP) active

ICE-PEER(PC:21372137213721372 (id=214741111111 url=http://someurl):default)/STREAM(PC:21372137213721372 (id=214741111111 url=http://someurl) transport-id=transport_0 - 72a938a6:f1234561cb2blablabla0dc711160ac): state dump

CAND-PAIR(AUgV): pair AUgV|IP4:192.168.0.50:54084/UDP|IP4:10.0.22.10:64477/UDP(host(IP4:192.168.0.50:54084/UDP)|candidate:foundation 1 udp 2130706431 10.0.22.10 64477 typ host generation 0): state=FAILED, priority=0x7e7f00fffdfffffe

CAND-PAIR(LRw8): pair LRw8|IP4:192.168.0.50:54084/UDP|IP4:160.21.130.15:64478/UDP(host(IP4:192.168.0.50:54084/UDP)|candidate:foundation 1 udp 2130706431 160.21.130.15 64478 typ host generation 0): state=FAILED, priority=0x7e7f00fffdfffffe

CAND-PAIR(uAK4): pair uAK4|IP4:192.168.0.50:54084/UDP|IP4:10.20.44.17:59873/UDP(host(IP4:192.168.0.50:54084/UDP)|candidate:foundation 1 udp 1694498815 10.20.44.17 59873 typ srflx raddr 0.0.0.0 rport 64479 generation 0): state=FAILED, priority=0x64fffffffcfe01ff

CAND-PAIR(ZzTX): pair ZzTX|IP4:192.168.0.50:54084/UDP|IP4:{publicIP}:14332/UDP(host(IP4:192.168.0.50:54084/UDP)|candidate:foundation 1 udp 16777215 {publicIP} 14332 typ relay raddr 0.0.0.0 rport 64480 generation 0): state=FAILED, priority=0xfffffffcfe01ff

ICE(PC:21372137213721372 (id=214741111111 url=http://someurl))/ICE-STREAM(PC:21372137213721372 (id=214741111111 url=http://someurl) transport-id=transport_0 - 72a938a6:f1234561cb2blablabla0dc711160ac): Remote component 1 in state 3 - dumping candidates

ICE(PC:21372137213721372 (id=214741111111 url=http://someurl))/ICE-STREAM(PC:21372137213721372 (id=214741111111 url=http://someurl) transport-id=transport_0 - 72a938a6:f1234561cb2blablabla0dc711160ac)/CAND(9Ozf): candidate:foundation 1 udp 2130706431 10.0.22.10 64477 typ host generation 0

ICE(PC:21372137213721372 (id=214741111111 url=http://someurl))/ICE-STREAM(PC:21372137213721372 (id=214741111111 url=http://someurl) transport-id=transport_0 - 72a938a6:f1234561cb2blablabla0dc711160ac)/CAND(N1wD): candidate:foundation 1 udp 2130706431 160.21.130.15 64478 typ host generation 0

ICE(PC:21372137213721372 (id=214741111111 url=http://someurl))/ICE-STREAM(PC:21372137213721372 (id=214741111111 url=http://someurl) transport-id=transport_0 - 72a938a6:f1234561cb2blablabla0dc711160ac)/CAND(YlFO): candidate:foundation 1 udp 1694498815 10.20.44.17 59873 typ srflx raddr 0.0.0.0 rport 64479 generation 0

ICE(PC:21372137213721372 (id=214741111111 url=http://someurl))/ICE-STREAM(PC:21372137213721372 (id=214741111111 url=http://someurl) transport-id=transport_0 - 72a938a6:f1234561cb2blablabla0dc711160ac)/CAND(8mKo): candidate:foundation 1 udp 16777215 {publicIP} 14332 typ relay raddr 0.0.0.0 rport 64480 generation 0

ICE-PEER(PC:21372137213721372 (id=214741111111 url=http://someurl):default): all checks completed success=0 fail=1

Any tips what I possibly do wrong would be appreciated!

have you added ?transport=udp Does it work on webrtc.github.io/samples/src/content/peerconnection/trickle-ice — Philipp Hancke
Yes, it works on webrtc.github.io/samples/src/content/peerconnection/trickle-ice. I will try to add ?transport flag. — MNie

MNie MNie · Accepted Answer · 2020-04-20T17:08:05

You should double-check your internal routes defined in AWS for an EC2 instance and some global one about inbound traffic. Mozilla Firefox would be the only one that would fail to do the "handshake" if the stun/turn server is not available outside of the internal network. Chrome, EDGE, Safari would work in such a situation and establish a P2P (srflx) connection.

In my situation, there was some additional definition of inbound traffic to all of the AWS instances, which were blocking the traffic to the stun/turn server. I realize that when I was trying to test the WebRTC from one computer (connected to a VPN) to another (not connected to a VPN) and it fails while doing a "handshake".

coTURN unable to do a handshake in Mozilla Firefox

1 Answers