code: public String getRemoteRealAddr(String realIpHeader) {
          String host = getProxyRemoteAddr(realIpHeader);
          if (host == null || host.equals("unknown")) {
              host = getRemoteAddr();
          }
  
          return host;
      }
docs: <p>getRemoteRealAddr.</p>
  
  @param realIpHeader a {@link java.lang.String} object.
  @return a {@link java.lang.String} object.