From 620530c4ee1aa0ae9b16ec2943549963a49c0306 Mon Sep 17 00:00:00 2001
From: Steve Pulec <spulec@gmail.com>
Date: Thu, 31 May 2018 22:07:13 -0400
Subject: [PATCH] Fix security group egress rule outout. Closes #1612

---
 moto/ec2/models.py                    | 2 +-
 moto/ec2/responses/security_groups.py | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/moto/ec2/models.py b/moto/ec2/models.py
index 674e0bdd..4e26f0f6 100755
--- a/moto/ec2/models.py
+++ b/moto/ec2/models.py
@@ -1324,7 +1324,7 @@ class SecurityGroup(TaggedEC2Resource):
         self.name = name
         self.description = description
         self.ingress_rules = []
-        self.egress_rules = [SecurityRule(-1, -1, -1, ['0.0.0.0/0'], [])]
+        self.egress_rules = [SecurityRule(-1, None, None, ['0.0.0.0/0'], [])]
         self.enis = {}
         self.vpc_id = vpc_id
         self.owner_id = "123456789012"
diff --git a/moto/ec2/responses/security_groups.py b/moto/ec2/responses/security_groups.py
index 9118c01b..0009ff13 100644
--- a/moto/ec2/responses/security_groups.py
+++ b/moto/ec2/responses/security_groups.py
@@ -179,8 +179,12 @@ DESCRIBE_SECURITY_GROUPS_RESPONSE = """<DescribeSecurityGroupsResponse xmlns="ht
                {% for rule in group.egress_rules %}
                     <item>
                        <ipProtocol>{{ rule.ip_protocol }}</ipProtocol>
+                       {% if rule.from_port %}
                        <fromPort>{{ rule.from_port }}</fromPort>
+                       {% endif %}
+                       {% if rule.to_port %}
                        <toPort>{{ rule.to_port }}</toPort>
+                       {% endif %}
                        <groups>
                           {% for source_group in rule.source_groups %}
                               <item>