diff --git a/dhcp-hosts.dpto2 b/dhcp-hosts.dpto2
index eea81d5..b980259 100644
--- a/dhcp-hosts.dpto2
+++ b/dhcp-hosts.dpto2
@@ -95,12 +95,13 @@ ff:ff:ff:ff:ff:fe,10.6.122.93
 ff:ff:ff:ff:ff:fe,10.6.122.94
 ff:ff:ff:ff:ff:fe,10.6.122.95
 # { "reserved-by": "Andy" }
-00:23:54:8c:65:13,10.6.122.96
+00:23:54:8c:65:13,10.6.122.96,set:client0023548c6513
 ff:ff:ff:ff:ff:fe,10.6.122.97
 ff:ff:ff:ff:ff:fe,10.6.122.98
 ff:ff:ff:ff:ff:fe,10.6.122.99
 ff:ff:ff:ff:ff:fe,10.6.122.100
-ff:ff:ff:ff:ff:fe,10.6.122.101
+# { "reserved-by": "Andy" }
+aa:bb:cc:dd:ee:ff,10.6.122.101,set:clientaabbccddeeff
 ff:ff:ff:ff:ff:fe,10.6.122.102
 ff:ff:ff:ff:ff:fe,10.6.122.103
 ff:ff:ff:ff:ff:fe,10.6.122.104
diff --git a/dhcp-opts.dpto2 b/dhcp-opts.dpto2
index 6fbf936..cad2290 100644
--- a/dhcp-opts.dpto2
+++ b/dhcp-opts.dpto2
@@ -1 +1,3 @@
 tag:client5cf9ffffffff,option:router,10.0.0.1
+tag:clientaabbccddeeff,option:router,10.6.122.96
+tag:client0023548c6513,option:router,10.6.122.2
diff --git a/main.py b/main.py
index 10c6fd1..fcc1093 100755
--- a/main.py
+++ b/main.py
@@ -23,6 +23,7 @@ app.secret_key = "6ab77f3c45447429c2ae163c260a626029519a66450e474c"
 users_file = "/etc/freeradius/users.dpto2"
 dhcp_hosts_file = "/etc/dnsmasq.d/dpto2/dhcp-hosts"
 dhcp_opts_file = "/etc/dnsmasq.d/dpto2/dhcp-opts"
+impossible_mac = "ff:ff:ff:ff:ff:fe"
 
 class Lock:
     def __init__(self, lockfile):
@@ -191,19 +192,21 @@ def list_users():
     return render_template("users.html", users=lines)
 
 mac_re = re.compile("(?:[0-9a-fA-F]{2}:){5}[0-9a-fA-F]{2}")
-ip_re = re.compile("\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}")
+ip_re_str = "\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}"
+ip_re = re.compile(ip_re_str)
 DhcpHostLine = namedtuple("DhcpHostLine","macs ip tag")
 
 def parse_dchp_host(line):
     macs = []
     ip = ""
-    tag = ""
+    tag = None
     parts = line.split(",")
     for p in parts:
         p = p.strip()
         m = mac_re.match(p)
         if m:
-            macs.append(m.group(0))
+            if m.group(0) != impossible_mac:
+                macs.append(m.group(0))
             continue
         m = ip_re.match(p)
         if m:
@@ -213,14 +216,40 @@ def parse_dchp_host(line):
             tag = p[4:]
     return DhcpHostLine(macs, ip, tag)
 
-Ip = namedtuple("Ip","reserved_by dhcp locked")
+Ip = namedtuple("Ip","reserved_by dhcp_pool locked macs gw")
 
 def load_ips():
     ipmap = {}
     for i in range(1,255):
-        ipmap[i] = Ip("",True,False)
-    ipmap[0] = ipmap[255] = Ip("", False, False)
+        ipmap[i] = Ip(
+            reserved_by="",
+            dhcp_pool=True,
+            locked=False,
+            macs=[],
+            gw=None
+        )
+    ipmap[0] = ipmap[255] = Ip(
+        reserved_by="",
+        dhcp_pool=False,
+        locked=False,
+        macs=[],
+        gw=None
+    )
     prefix = None
+
+    # Read custom gateways
+    gws = {}
+    with open(dhcp_opts_file) as f:
+        for line in f:
+            line = line.strip()
+            if line.startswith("#"): continue
+            m = re.match(
+                    "tag:(client[0-9a-f]{12}),option:router,(" + ip_re_str + ")",
+                    line
+                )
+            if m:
+                gws[m.group(1)] = m.group(2)
+
     with open(dhcp_hosts_file) as f:
         meta = {}
         for line in f:
@@ -241,8 +270,10 @@ def load_ips():
                     prefix = ".".join(r.ip.split(".")[:-1])
                 ipmap[ip] = Ip(
                     reserved_by=meta.get("reserved-by",""),
-                    dhcp=False,
-                    locked=meta.get("locked",False)
+                    dhcp_pool=False,
+                    locked=meta.get("locked",False),
+                    macs=r.macs,
+                    gw=gws.get(r.tag, None)
                 )
                 meta = {}
     ipmap["prefix"] = prefix
@@ -253,7 +284,7 @@ def ips():
     ipmap = load_ips()
     return render_template("ips.html", ipmap=ipmap)
 
-@app.route("/ip/<int:last_byte>")
+@app.route("/ip/<int:last_byte>", methods=['GET', 'POST'])
 def ip(last_byte):
     ipmap = load_ips()
     addr = "{}.{}".format(ipmap["prefix"], last_byte)
diff --git a/templates/ip.html b/templates/ip.html
index 9fd84ff..a849cfe 100644
--- a/templates/ip.html
+++ b/templates/ip.html
@@ -11,45 +11,54 @@
   <h3>Asignación de {{ addr }}</h3>
 </div>
 
+{{ meta }}
+
 {% if meta.locked %}
 <div class="alert alert-warning"><i class="fa fa-lock"></i> Esta dirección está reservada por <i>Ilúvatar</i></div>
 {% endif %}
 
 <div class="row">
+
  <form class="form-horizontal" method="POST">
  {% if meta.locked %}
  <fieldset disabled>
  {% endif %}
- <div class="form-group">
- <div class="col-xs-6">
-   <input type="checkbox" id="reserved" name="reserved"
-       {% if meta.reserved_by -%}
-           checked="checked"
-       {%- endif -%}>
-   <label for="reserved">Reservado a:</label>
-    <input type="text" class="form-control"
-           id="reserved-by" name="reserved-by"
+
+  <div class="form-group">
+   <div class="col-xs-6">
+    <input type="checkbox" id="reserved" name="reserved"
         {% if meta.reserved_by -%}
-            value="{{ meta.reserved_by }}"
-        {%- else -%}
-            disabled
-        {%- endif -%}
-        >
-    </div>  </div>
+            checked="checked"
+        {%- endif -%}>
+    <label for="reserved">Reservado a:</label>
+    <input type="text" class="form-control"
+            id="reserved-by" name="reserved-by"
+         {% if meta.reserved_by -%}
+             value="{{ meta.reserved_by }}"
+         {%- else -%}
+             disabled
+         {%- endif -%}
+         >
+  </div>
+ </div>
+
   <div class="form-group">
       <div class="col-xs-11">
-   <input type="checkbox" id="dhcp" name="dhcp"></input>
+   <input type="checkbox" id="dhcp" name="dhcp"
+       {% if meta.dhcp_pool or meta.macs %}checked="checked"{% endif %}/>
    <label for="dhcp">Ofrecer por DHCP</label>
    <fieldset id="dhcp-fieldset" disabled>
    <div class="form-group">
      <div class="col-sm-offset-1">
-       <input type="radio" id="dhcp-client-any" name="dhcp-client" value="any">
+       <input type="radio" id="dhcp-client-any" name="dhcp-client" value="any"
+        {% if meta.dhcp_pool %}checked="checked"{% endif %}/>
        <label for="dhcp-client-any">A cualquier dispositivo</label>
      </div>
    </div>
    <div class="form-group">
      <div class="col-sm-offset-1">
-       <input type="radio" id="dhcp-client-specific" name="dhcp-client" value="mac">
+       <input type="radio" id="dhcp-client-specific" name="dhcp-client" value="mac"
+       {% if meta.macs %}checked="checked"{% endif %}/>
        <label for="dhcp-client-specific">A un dispositivo específico</label>
        <div class="form-group">
         <fieldset id="dhcp-specific-fieldset" disabled>
@@ -57,7 +66,7 @@
              <label for="dhcp-client-mac" class="col-sm-4 control-label">MAC:</label>
              <div class="col-sm-5">
              <input type="text" class="form-control" name="dhcp-client-mac"
-                    placeholder="aa:bb:cc:dd:ee:ff"/>
+                    value="{{ meta.macs|join(",") }}"/>
              </div>
          </div>
          <div>
@@ -66,7 +75,7 @@
              </label>
              <div class="col-sm-5">
              <input type="text" class="form-control" name="dhcp-client-mac"
-                    placeholder="10.6.122.1"/>
+                    value="{{ meta.gw if meta.gw }}"/>
              </div>
          </div>
         </fieldset>
diff --git a/templates/ips.html b/templates/ips.html
index 4c512de..8bfc9f1 100644
--- a/templates/ips.html
+++ b/templates/ips.html
@@ -23,11 +23,11 @@
           {%- if col == 7 %} ips-ver-half{% endif %}
           {%- if row == 7 %} ips-hor-half{% endif %}
           {% if unusable %} unusable{% endif %}
-          {%- if ipmap[ip].dhcp %} dhcp-pool{% endif -%}
+          {%- if ipmap[ip].dhcp_pool %} dhcp-pool{% endif -%}
           ">
           <div style="display: inline-block; max-height: 52px;">
               <div class="name">
-                {% if ipmap[ip].dhcp %}
+                {% if ipmap[ip].dhcp_pool %}
                     DHCP
                 {% else %}
                     {{ ipmap[ip].reserved_by }}