diff --git a/.gitignore b/.gitignore
index 7b1269c1..59f09cb0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,5 +18,8 @@ website/build
 # node modules
 node_modules
 
+# testing
+main.py
+
 # trash
 .DS_Store
\ No newline at end of file
diff --git a/config.py b/config.py
index 67562868..2f569131 100644
--- a/config.py
+++ b/config.py
@@ -72,6 +72,7 @@ ALIASES = {
         "ci": {
             "Circleci": "CircleCI",
             "Travisci": "TravisCI",
+            "Teamcity": "TC",
         },
         "container": {
             "Rkt": "RKT",
diff --git a/diagrams/__init__.py b/diagrams/__init__.py
index 9626ea6d..8d35ca4e 100644
--- a/diagrams/__init__.py
+++ b/diagrams/__init__.py
@@ -1,6 +1,6 @@
 import contextvars
 import os
-from hashlib import md5
+import uuid
 from pathlib import Path
 from random import getrandbits
 from typing import List, Union, Dict
@@ -159,13 +159,13 @@ class Diagram:
                 return True
         return False
 
-    def node(self, hashid: str, label: str, **attrs) -> None:
+    def node(self, nodeid: str, label: str, **attrs) -> None:
         """Create a new node."""
-        self.dot.node(hashid, label=label, **attrs)
+        self.dot.node(nodeid, label=label, **attrs)
 
     def connect(self, node: "Node", node2: "Node", edge: "Edge") -> None:
         """Connect the two Nodes."""
-        self.dot.edge(node.hashid, node2.hashid, **edge.attrs)
+        self.dot.edge(node.nodeid, node2.nodeid, **edge.attrs)
 
     def subgraph(self, dot: Digraph) -> None:
         """Create a subgraph for clustering"""
@@ -243,9 +243,9 @@ class Cluster:
                 return True
         return False
 
-    def node(self, hashid: str, label: str, **attrs) -> None:
+    def node(self, nodeid: str, label: str, **attrs) -> None:
         """Create a new node in the cluster."""
-        self.dot.node(hashid, label=label, **attrs)
+        self.dot.node(nodeid, label=label, **attrs)
 
     def subgraph(self, dot: Digraph) -> None:
         self.dot.subgraph(dot)
@@ -267,8 +267,8 @@ class Node:
 
         :param label: Node label.
         """
-        # Generates a hash for identifying a node.
-        self._hash = self._rand_hash()
+        # Generates an ID for identifying a node.
+        self._id = self._rand_id()
         self.label = label
 
         # fmt: off
@@ -291,9 +291,9 @@ class Node:
 
         # If a node is in the cluster context, add it to cluster.
         if self._cluster:
-            self._cluster.node(self._hash, self.label, **self.attrs)
+            self._cluster.node(self._id, self.label, **self.attrs)
         else:
-            self._diagram.node(self._hash, self.label, **self.attrs)
+            self._diagram.node(self._id, self.label, **self.attrs)
 
     def __repr__(self):
         _name = self.__class__.__name__
@@ -366,8 +366,8 @@ class Node:
         return self
 
     @property
-    def hashid(self):
-        return self._hash
+    def nodeid(self):
+        return self._id
 
     # TODO: option for adding flow description to the connection edge
     def connect(self, node: "Node", edge: "Edge"):
@@ -386,8 +386,8 @@ class Node:
         return node
 
     @staticmethod
-    def _rand_hash():
-        return md5(getrandbits(64).to_bytes(64, "big")).hexdigest()
+    def _rand_id():
+        return uuid.uuid4().hex
 
     def _load_icon(self):
         basedir = Path(os.path.abspath(os.path.dirname(__file__)))
@@ -436,10 +436,13 @@ class Edge:
         for k, v in self._default_edge_attrs.items():
             self._attrs[k] = v
 
-        # Graphviz complaining about using label for edges, so replace it with xlabel.
-        self._attrs["xlabel"] = label
-        self._attrs["color"] = color
-        self._attrs["style"] = style
+        if label:
+            # Graphviz complaining about using label for edges, so replace it with xlabel.
+            self._attrs["xlabel"] = label
+        if color:
+            self._attrs["color"] = color
+        if style:
+            self._attrs["style"] = style
         self._attrs.update(attrs)
 
     def __sub__(self, other: Union["Node", "Edge", List["Node"]]):
diff --git a/diagrams/aws/network.py b/diagrams/aws/network.py
index b3963d45..705e1962 100644
--- a/diagrams/aws/network.py
+++ b/diagrams/aws/network.py
@@ -36,6 +36,10 @@ class ElasticLoadBalancing(_Network):
     _icon = "elastic-load-balancing.png"
 
 
+class Endpoint(_Network):
+    _icon = "endpoint.png"
+
+
 class GlobalAccelerator(_Network):
     _icon = "global-accelerator.png"
 
@@ -68,6 +72,10 @@ class TransitGateway(_Network):
     _icon = "transit-gateway.png"
 
 
+class VPCRouter(_Network):
+    _icon = "vpc-router.png"
+
+
 class VPC(_Network):
     _icon = "vpc.png"
 
diff --git a/diagrams/onprem/ci.py b/diagrams/onprem/ci.py
index 490fcd83..f6302b05 100644
--- a/diagrams/onprem/ci.py
+++ b/diagrams/onprem/ci.py
@@ -16,6 +16,10 @@ class Jenkins(_Ci):
     _icon = "jenkins.png"
 
 
+class Teamcity(_Ci):
+    _icon = "teamcity.png"
+
+
 class Travisci(_Ci):
     _icon = "travisci.png"
 
@@ -24,3 +28,4 @@ class Travisci(_Ci):
 
 CircleCI = Circleci
 TravisCI = Travisci
+TC = Teamcity
diff --git a/diagrams/onprem/iac.py b/diagrams/onprem/iac.py
index 1fda1a1b..a2ae55d1 100644
--- a/diagrams/onprem/iac.py
+++ b/diagrams/onprem/iac.py
@@ -8,6 +8,14 @@ class _Iac(_OnPrem):
     _icon_dir = "resources/onprem/iac"
 
 
+class Ansible(_Iac):
+    _icon = "ansible.png"
+
+
+class Awx(_Iac):
+    _icon = "awx.png"
+
+
 class Terraform(_Iac):
     _icon = "terraform.png"
 
diff --git a/diagrams/onprem/network.py b/diagrams/onprem/network.py
index 05203fb6..82a61499 100644
--- a/diagrams/onprem/network.py
+++ b/diagrams/onprem/network.py
@@ -56,6 +56,10 @@ class Pfsense(_Network):
     _icon = "pfsense.png"
 
 
+class Pomerium(_Network):
+    _icon = "pomerium.png"
+
+
 class Tomcat(_Network):
     _icon = "tomcat.png"
 
diff --git a/docs/nodes/aws.md b/docs/nodes/aws.md
index 09f68841..a032d90c 100644
--- a/docs/nodes/aws.md
+++ b/docs/nodes/aws.md
@@ -62,6 +62,7 @@ Node classes list of aws provider.
 - **diagrams.aws.network.Cloudfront**, **CF** (alias)
 - **diagrams.aws.network.DirectConnect**
 - **diagrams.aws.network.ElasticLoadBalancing**, **ELB** (alias)
+- **diagrams.aws.network.Endpoint**
 - **diagrams.aws.network.GlobalAccelerator**, **GAX** (alias)
 - **diagrams.aws.network.InternetGateway**
 - **diagrams.aws.network.NATGateway**
@@ -70,6 +71,7 @@ Node classes list of aws provider.
 - **diagrams.aws.network.Route53**
 - **diagrams.aws.network.SiteToSiteVpn**
 - **diagrams.aws.network.TransitGateway**
+- **diagrams.aws.network.VPCRouter**
 - **diagrams.aws.network.VPC**
 
 ## aws.management
diff --git a/docs/nodes/onprem.md b/docs/nodes/onprem.md
index aac9b292..81db45d4 100644
--- a/docs/nodes/onprem.md
+++ b/docs/nodes/onprem.md
@@ -14,6 +14,7 @@ Node classes list of onprem provider.
 
 - **diagrams.onprem.ci.Circleci**, **CircleCI** (alias)
 - **diagrams.onprem.ci.Jenkins**
+- **diagrams.onprem.ci.Teamcity**, **TC** (alias)
 - **diagrams.onprem.ci.Travisci**, **TravisCI** (alias)
 
 ## onprem.queue
@@ -77,6 +78,7 @@ Node classes list of onprem provider.
 - **diagrams.onprem.network.Linkerd**
 - **diagrams.onprem.network.Nginx**
 - **diagrams.onprem.network.Pfsense**, **PFSense** (alias)
+- **diagrams.onprem.network.Pomerium**
 - **diagrams.onprem.network.Tomcat**
 - **diagrams.onprem.network.Traefik**
 - **diagrams.onprem.network.Vyos**, **VyOS** (alias)
@@ -90,6 +92,8 @@ Node classes list of onprem provider.
 
 ## onprem.iac
 
+- **diagrams.onprem.iac.Ansible**
+- **diagrams.onprem.iac.Awx**
 - **diagrams.onprem.iac.Terraform**
 
 ## onprem.analytics
diff --git a/resources/aws/network/endpoint.png b/resources/aws/network/endpoint.png
new file mode 100644
index 00000000..2357ce49
Binary files /dev/null and b/resources/aws/network/endpoint.png differ
diff --git a/resources/aws/network/vpc-router.png b/resources/aws/network/vpc-router.png
new file mode 100644
index 00000000..b0ae6d14
Binary files /dev/null and b/resources/aws/network/vpc-router.png differ
diff --git a/resources/onprem/ci/teamcity.png b/resources/onprem/ci/teamcity.png
new file mode 100644
index 00000000..54e922d1
Binary files /dev/null and b/resources/onprem/ci/teamcity.png differ
diff --git a/resources/onprem/iac/ansible.png b/resources/onprem/iac/ansible.png
new file mode 100644
index 00000000..39d77aa6
Binary files /dev/null and b/resources/onprem/iac/ansible.png differ
diff --git a/resources/onprem/iac/awx.png b/resources/onprem/iac/awx.png
new file mode 100644
index 00000000..975da780
Binary files /dev/null and b/resources/onprem/iac/awx.png differ
diff --git a/resources/onprem/network/pomerium.png b/resources/onprem/network/pomerium.png
new file mode 100644
index 00000000..1bf2da51
Binary files /dev/null and b/resources/onprem/network/pomerium.png differ