diff --git a/dnsrecon.py b/dnsrecon.py
index 04a80d83..2639a0ac 100755
--- a/dnsrecon.py
+++ b/dnsrecon.py
@@ -453,7 +453,7 @@ def brute_domain(res, dictfile, dom, filter_=None, verbose=False, ignore_wildcar
             if type_ in ['A', 'AAAA']:
                 # Filter Records if filtering was enabled
                 if filter_:
-                    if address_or_target_ not in wildcard_set:
+                    if wildcard_set and address_or_target_ not in wildcard_set:
                         print_and_append = True
                         found_dict["address"] = address_or_target_
                 else:
@@ -907,7 +907,7 @@ def check_recursive(res, ns_server, timeout):
     return is_recursive
 
 
-def general_enum(res, domain, do_axfr, do_bing, do_yandex, do_spf, do_whois, do_crt, zw, thread_num=None):
+def general_enum(res, domain, do_axfr, do_bing, do_yandex, do_spf, do_whois, do_crt, zw, request_timeout, thread_num=None):
     """
     Function for performing general enumeration of a domain. It gets SOA, NS, MX
     A, AAAA and SRV records for a given domain. It will first try a Zone Transfer
@@ -1073,10 +1073,11 @@ def general_enum(res, domain, do_axfr, do_bing, do_yandex, do_spf, do_whois, do_
         if do_crt:
             print_status("Performing Crt.sh Search Enumeration")
             crt_rcd = se_result_process(res, scrape_crtsh(domain))
-            for r in crt_rcd:
-                if "address" in crt_rcd:
-                    ip_for_whois.append(r["address"])
-            returned_records.extend(crt_rcd)
+            if crt_rcd:
+                for r in crt_rcd:
+                    if "address" in crt_rcd:
+                        ip_for_whois.append(r["address"])
+                returned_records.extend(crt_rcd)
 
         if do_whois:
             whois_rcd = whois_ips(res, ip_for_whois)
@@ -1648,9 +1649,9 @@ def main():
             elif type_ == 'std':
                 print_status(f"{type_}: Performing General Enumeration against: {domain}...")
                 std_enum_records = general_enum(res, domain, xfr, bing, yandex,
-                                                spf_enum, do_whois, do_crt, zonewalk,
+                                                spf_enum, do_whois, do_crt, zonewalk, request_timeout,
                                                 thread_num=thread_num)
-                if do_output:
+                if do_output and std_enum_records:
                     returned_records.extend(std_enum_records)
 
             elif type_ == 'rvl':
diff --git a/lib/bingenum.py b/lib/bingenum.py
index 03709f23..e951eca5 100644
--- a/lib/bingenum.py
+++ b/lib/bingenum.py
@@ -37,7 +37,15 @@ def scrape_bing(dom):
 
     for n in searches:
         url = "http://www.bing.com/search?q=domain%3A" + dom + "&qs=n&first=" + n
-        sock = urllib.request.urlopen(url)
+        req = urllib.request.Request(
+            url,
+            data=None,
+            headers={
+                'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.47 Safari/537.36'
+            }
+        )
+
+        sock = urllib.request.urlopen(req, timeout=10)
         data = sock.read().decode("utf-8")
         results.extend(re.findall(r"([a-zA-Z0-9\-.]+" + dom + ")/?", data))
         sock.close()
diff --git a/lib/crtenum.py b/lib/crtenum.py
index 3a900fa7..a203315b 100644
--- a/lib/crtenum.py
+++ b/lib/crtenum.py
@@ -34,7 +34,7 @@ def scrape_crtsh(dom):
 
     req = Request(url=url, headers=headers)
     try:
-        resp = urlopen(req)
+        resp = urlopen(req, timeout=30)
         data = resp.read()
     except HTTPError as e:
         print_error(f'Bad http status from crt.sh: "{e.code}"')
diff --git a/lib/yandexenum.py b/lib/yandexenum.py
index ce92fe51..ddf5c7ec 100644
--- a/lib/yandexenum.py
+++ b/lib/yandexenum.py
@@ -16,7 +16,6 @@
 #    along with this program; if not, write to the Free Software
 #    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
-
 import urllib
 import re
 import time
@@ -42,7 +41,7 @@ def scrape_yandex(dom):
     for _ in searches:
         url = "https://yandex.com/search/?text=site%3A" + dom
         try:
-            sock = urllib.request.urlopen(url)
+            sock = urllib.request.urlopen(url, timeout=10)
             data = sock.read().decode("utf-8")
             sock.close()
         except Exception as e: