Revert "Fix c-ares tests ipv6-only brokenness"

This reverts commit 27718ce64dc1d5dcfc954aa6748191259fc68c59.

2 files changed, 4 insertions, 4 deletions

diff --git a/test/cpp/naming/utils/dns_resolver.py b/test/cpp/naming/utils/dns_resolver.py
index 21e37562db..74f4ca2351 100755
--- a/test/cpp/naming/utils/dns_resolver.py
+++ b/test/cpp/naming/utils/dns_resolver.py
@@ -25,7 +25,7 @@ import twisted.internet.reactor as reactor
 
 def main():
   argp = argparse.ArgumentParser(description='Make DNS queries for A records')
-  argp.add_argument('-s', '--server_host', default='::1', type=str,
+  argp.add_argument('-s', '--server_host', default='127.0.0.1', type=str,
                     help='Host for DNS server to listen on for TCP and UDP.')
   argp.add_argument('-p', '--server_port', default=53, type=int,
                     help='Port that the DNS server is listening on.')
diff --git a/test/cpp/naming/utils/dns_server.py b/test/cpp/naming/utils/dns_server.py
index e198dd132d..1e8e2e3287 100755
--- a/test/cpp/naming/utils/dns_server.py
+++ b/test/cpp/naming/utils/dns_server.py
@@ -103,11 +103,11 @@ def start_local_dns_server(args):
   server = twisted.names.server.DNSServerFactory(
       authorities=[test_domain_com], verbose=2)
   server.noisy = 2
-  twisted.internet.reactor.listenTCP(args.port, server, interface='::1')
+  twisted.internet.reactor.listenTCP(args.port, server)
   dns_proto = twisted.names.dns.DNSDatagramProtocol(server)
   dns_proto.noisy = 2
-  twisted.internet.reactor.listenUDP(args.port, dns_proto, interface='::1')
-  print('starting local dns server on [::1]:%s' % args.port)
+  twisted.internet.reactor.listenUDP(args.port, dns_proto)
+  print('starting local dns server on 127.0.0.1:%s' % args.port)
   print('starting twisted.internet.reactor')
   twisted.internet.reactor.suggestThreadPoolSize(1)
   twisted.internet.reactor.run()