Github user jpeach commented on a diff in the pull request:

    https://github.com/apache/trafficserver/pull/614#discussion_r61987839
  
    --- Diff: proxy/http2/Http2SessionAccept.cc ---
    @@ -38,9 +39,22 @@ Http2SessionAccept::~Http2SessionAccept()
     void
     Http2SessionAccept::accept(NetVConnection *netvc, MIOBuffer *iobuf, 
IOBufferReader *reader)
     {
    +  AclRecord *session_acl_record = NULL;
    +  sockaddr const *client_ip = netvc->get_remote_addr();
    +  IpAllow::scoped_config ipallow;
    +  if (ipallow && (((session_acl_record = ipallow->match(client_ip)) == 
NULL) || (session_acl_record->isEmpty()))) {
    +    ip_port_text_buffer ipb;
    +    Warning("http2 client '%s' prohibited by ip-allow policy", 
ats_ip_ntop(client_ip, ipb, sizeof(ipb)));
    --- End diff --
    
    Oh so this is fail-closed when there is no config? If that is the case, 
then HTTP/1 should do the same thing. We should have a single function that 
does this check for both protocols to avoid this kind of drift.


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