def check_socks5_udp(host, port, username=None, password=None,

test_host='1.1.1.1', test_port=53, timeout=10):

try:

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

sock.settimeout(timeout)

sock.connect((host, port))

auth = Socks5Auth(username, password)

conn = Socks5Connection(sock, auth)

conn.negotiate()

bind_addr, bind_port = conn.udp_associate()

print(f"UDP association established: {bind_addr}:{bind_port}")

header = struct.pack('!BBBB', 0x00, 0x00, 0x00, 0x01) # IPv4

header += socket.inet_aton(test_host)

header += struct.pack('!H', test_port)

dns_query = b'\x00\x00\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x07example\x03com\x00\x00\x01\x00\x01'

packet = header + dns_query

udp_sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

udp_sock.settimeout(timeout)

udp_sock.sendto(packet, (bind_addr, bind_port))

data, addr = udp_sock.recvfrom(1024)

print(f"Received UDP response from {addr}")

return True

except Exception as e:

print("Error while checking UDP:", str(e))

return False

finally:

sock.close()

udp_sock.close()

Please add this simple logic to your proxy https://dashboard.marsproxies.com/tools/online-proxy-checker checker to check udp connection