add option to disable ssh

cowrie.cfg.dist

@@ -245,6 +245,11 @@ forward_redirect_25 = 127.0.0.1:12525
 forward_redirect_587 = 127.0.0.1:12525
 
 
+[ssh]
+
+# Enable Telnet support, enabled by default
+enabled = true
+
 # ============================================================================
 # Telnet Specific Options
 # ============================================================================

twisted/plugins/cowrie_plugin.py

@@ -99,6 +99,26 @@ class CowrieServiceMaker(object):
             factory.portal.registerChecker(
                 core.checkers.HoneypotNoneChecker())
 
+        # ssh is enabled by default
+        if cfg.has_option('ssh', 'enabled') == False or \
+           (cfg.has_option('ssh', 'enabled') and \
+               cfg.getboolean('ssh', 'enabled') == True):
+            enableSSH = True
+        else:
+            enableSSH = False
+
+        # telnet is disabled by default
+        if cfg.has_option('telnet', 'enabled') and \
+                 cfg.getboolean('telnet', 'enabled') == True:
+            enableTelnet = True
+        else:
+            enableTelnet = False
+
+        if enableTelnet == False and enableSSH == False:
+            print('ERROR: You must at least enable SSH or Telnet')
+            sys.exit(1)
+
+        if enableSSH:
             if cfg.has_option('ssh', 'listen_addr'):
                 listen_ssh_addr = cfg.get('ssh', 'listen_addr')
             elif cfg.has_option('honeypot', 'listen_addr'):
@@ -121,9 +141,7 @@ class CowrieServiceMaker(object):
                 # FIXME: Use addService on topService ?
                 svc.setServiceParent(topService)
 
-        if cfg.has_option('telnet', 'enabled') and \
+        if enableTelnet:
-                 cfg.getboolean('telnet', 'enabled') == True:
-
             if cfg.has_option('telnet', 'listen_addr'):
                 listen_telnet_addr = cfg.get('telnet', 'listen_addr')
             else: