diff --git a/docker/routlin-dash/app/pages/radius/action.py b/docker/routlin-dash/app/pages/radius/action.py
index d9e05ec..c67a4db 100644
--- a/docker/routlin-dash/app/pages/radius/action.py
+++ b/docker/routlin-dash/app/pages/radius/action.py
@@ -70,6 +70,7 @@ def auth_mode_save():
     if eap_protocol not in ('eap_peap', 'eap_ttls', 'eap_md5'):
         eap_protocol = 'eap_peap'
     tunneled_reply  = 'tunneled_reply' in request.form
+    include_length  = 'include_length' in request.form
     inner_protocol  = request.form.get('inner_protocol', '')
 
     _valid_inner = {
@@ -87,10 +88,15 @@ def auth_mode_save():
             after['inner_protocol'] = inner_protocol
         else:
             after.pop('inner_protocol', None)
+        if eap_protocol == 'eap_ttls':
+            after['include_length'] = include_length
+        else:
+            after.pop('include_length', None)
     else:
         after.pop('eap_protocol',    None)
         after.pop('tunneled_reply',  None)
         after.pop('inner_protocol',  None)
+        after.pop('include_length',  None)
     cfg.setdefault('radius', {})['options'] = after
 
     changes = diff_fields(before, after)
diff --git a/docker/routlin-dash/app/pages/radius/content.json b/docker/routlin-dash/app/pages/radius/content.json
index 3aadbc4..13181dc 100644
--- a/docker/routlin-dash/app/pages/radius/content.json
+++ b/docker/routlin-dash/app/pages/radius/content.json
@@ -272,6 +272,23 @@
               "type": "raw_html",
               "html": "</div>"
             },
+            {
+              "type": "raw_html",
+              "html": "<div id=\"eap-ttls-row\">"
+            },
+            {
+              "type": "field",
+              "label": "",
+              "name": "include_length",
+              "input_type": "checkbox",
+              "checkbox_label": "Include Length",
+              "value": "%RADIUS_INCLUDE_LENGTH%",
+              "hint": "Include the total length of message in every packet."
+            },
+            {
+              "type": "raw_html",
+              "html": "</div>"
+            },
             {
               "type": "raw_html",
               "html": "</div>"
diff --git a/docker/routlin-dash/app/pages/radius/view.py b/docker/routlin-dash/app/pages/radius/view.py
index 66487d9..d1b1983 100644
--- a/docker/routlin-dash/app/pages/radius/view.py
+++ b/docker/routlin-dash/app/pages/radius/view.py
@@ -119,7 +119,8 @@ def collect_tokens(cfg):
     tokens['RADIUS_LOGGING_HINT']   = 'Unchecking will clear logs.' if fr_gen.get('logging', False) else ''
     tokens['RADIUS_GEN_LOG_MAX_KB'] = str(fr_gen.get('log_max_kb', 1024))
 
-    tokens['RADIUS_TUNNELED_REPLY'] = 'true' if fr_opts.get('tunneled_reply', False) else ''
+    tokens['RADIUS_TUNNELED_REPLY']  = 'true' if fr_opts.get('tunneled_reply', False) else ''
+    tokens['RADIUS_INCLUDE_LENGTH']  = 'true' if fr_opts.get('include_length', False) else ''
 
     vlans = cfg.get('vlans', [])
     default_vlan = next((v['name'] for v in vlans if v.get('radius_default') is True), '')
diff --git a/routlin/mod_radius.py b/routlin/mod_radius.py
index 383ebc2..ed464a0 100644
--- a/routlin/mod_radius.py
+++ b/routlin/mod_radius.py
@@ -295,6 +295,10 @@ def set_freeradius_eap(data):
         inner_block = 'peap' if eap_protocol == 'eap_peap' else 'ttls'
         content4 = _patch_setting_in_block(content4, inner_block, 'default_eap_type', inner_protocol)
 
+    if eap_protocol == 'eap_ttls':
+        il_val   = 'yes' if opts.get('include_length', False) else 'no'
+        content4 = _patch_setting_in_block(content4, 'ttls', 'include_length', il_val)
+
     if content4 == content:
         return False
     RADIUS_EAP_FILE.write_text(content4)