diff --git a/.gitignore b/.gitignore
new file mode 100644
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--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,144 @@
+
+# Created by https://www.gitignore.io/api/python,virtualenv,visualstudiocode
+# Edit at https://www.gitignore.io/?templates=python,virtualenv,visualstudiocode
+
+### Python ###
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+.hypothesis/
+.pytest_cache/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+.python-version
+
+# celery beat schedule file
+celerybeat-schedule
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+### Python Patch ###
+.venv/
+
+### VirtualEnv ###
+# Virtualenv
+# http://iamzed.com/2009/05/07/a-primer-on-virtualenv/
+[Bb]in
+[Ii]nclude
+[Ll]ib
+[Ll]ib64
+[Ll]ocal
+[Ss]cripts
+pyvenv.cfg
+pip-selfcheck.json
+
+### VisualStudioCode ###
+.vscode/
+
+### VisualStudioCode Patch ###
+# Ignore all local history of files
+.history
+
+# End of https://www.gitignore.io/api/python,virtualenv,visualstudiocode
\ No newline at end of file
diff --git a/MANIFEST.in b/MANIFEST.in
new file mode 100644
index 0000000..32d7dc7
--- /dev/null
+++ b/MANIFEST.in
@@ -0,0 +1,2 @@
+include README.md
+include pysip/templates/*
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..bc8a5e5
--- /dev/null
+++ b/README.md
@@ -0,0 +1,3 @@
+# PySIP
+
+CLI para realização de testes na area de VoIP.
\ No newline at end of file
diff --git a/pysip/__init__.py b/pysip/__init__.py
new file mode 100644
index 0000000..a676f05
--- /dev/null
+++ b/pysip/__init__.py
@@ -0,0 +1,4 @@
+from pysip.cli import cli
+
+
+__all__ = ['cli']
\ No newline at end of file
diff --git a/pysip/cli.py b/pysip/cli.py
new file mode 100644
index 0000000..56e3b68
--- /dev/null
+++ b/pysip/cli.py
@@ -0,0 +1,93 @@
+import click
+import socket
+import logging
+from time import time
+from random import random
+from pprint import pprint
+
+from pysip.log import logger
+from pysip.messages import Message, parse_header
+
+
+@click.group()
+def cli():
+    '''
+    Função que representa a CLI em si.
+    '''
+    ...
+
+
+@cli.group()
+@click.option('--debug', type=bool, help='Enable debug mode.')
+def server(debug):
+    '''
+    Command that starts the application in SERVER mode.
+    '''
+    logger.debug('DEBUG mode enabled.')
+    logger.setLevel(logging.DEBUG if debug else logging.INFO)
+    logger.info('Application started in SERVER mode.')
+
+@cli.group()
+@click.option('--debug', type=bool, help='Enable debug mode.')
+def client(debug):
+    '''
+    Command that starts the application in CLIENT mode.
+    '''
+    logger.setLevel(logging.DEBUG if debug else logging.INFO)
+    logger.debug('DEBUG mode enabled.')
+    logger.info('Application started in CLIENT mode.')
+
+@client.command('alg', help='Performs the ALG test with the host informed.')
+@click.option('--host', type=str, required=True, help='Host of the test.')
+@click.option('--username', type=str, required=True, help='Username of the test.')
+@click.option('--domain', type=str, required=True, help='Domain of the test.')
+@click.option('--port', type=int, default=5060, help='Port of the test.')
+def aug(host, port, username, domain):
+    logger.info('Performing ALG test.')
+    with socket.socket(socket.AF_INET, socket.SOCK_DGRAM) as interface:
+        interface.settimeout(5)
+        destiny_address = (host, port)
+        logger.info(f'Destiny IP: {host}')
+        logger.info(f'Destiny Port: {port}')
+        interface.connect(destiny_address) 
+        in_host, in_port = interface.getsockname()
+        logger.info(f'Internal IP used: {in_host}')
+        logger.info(f'Internal selected port: {in_port}')
+        callid = Message.make_hash(str(time() * random()))
+        to_tag = Message.make_hash(str(time() * random()))
+        branch = Message.make_hash(str(time() * random()))
+        logger.debug(f'Call-ID generated for the package: {callid}')
+        logger.debug(f'To-Tag generated for the package: {to_tag}')
+        logger.debug(f'Branch-Tag generated for the package: {branch}')
+        logger.debug('Generating INVITE that will be forwarded to the Host.')
+        message = Message('invite', **{
+                'address': {'ip': in_host, 'port': in_port },
+                'branch': branch,
+                'from': {
+                        'user': username,
+                        'domain': domain,
+                        'tag':  to_tag
+                },
+                'callid': callid
+        })
+        try:
+                interface.send(message.render)
+                response = interface.recv(4096).decode('ASCII')
+                resp_list = [v for v in response.split('\r\n') if v]
+                result = dict(parse_header(value) for value in resp_list)
+                logger.info(f'Response title: {result["title"]}')
+                logger.debug(f'Call-ID response: {result["Call-ID"]}')
+                logger.debug(f'Response source server: {result["Server"]}')
+                _, title = result["title"].split('200')
+
+                if title.strip() == 'OK':
+                        logger.info('ALG test completed successfully.')
+
+                else:
+                        logger.warn('Router with ALG detected.')
+
+        except KeyError:
+                logger.error('Could not parse the response.')
+
+        except socket.timeout:
+                logger.error('Connection timeout with SipProxy.')
diff --git a/pysip/log.py b/pysip/log.py
new file mode 100644
index 0000000..4191d78
--- /dev/null
+++ b/pysip/log.py
@@ -0,0 +1,15 @@
+import logging
+
+
+logger = logging.getLogger(__name__)
+
+formatter = logging.Formatter(
+    '[%(asctime)s] - %(levelname)s - %(message)s',
+    datefmt='%d/%m/%Y %H:%M:%S'
+)
+
+ch = logging.StreamHandler()
+ch.setLevel(logging.DEBUG)
+ch.setFormatter(formatter)
+
+logger.addHandler(ch)
diff --git a/pysip/messages.py b/pysip/messages.py
new file mode 100644
index 0000000..9c7458e
--- /dev/null
+++ b/pysip/messages.py
@@ -0,0 +1,42 @@
+from os import path
+from time import time
+from hashlib import md5
+
+from jinja2 import Environment, FileSystemLoader
+
+
+here = path.abspath(path.dirname(__file__))
+
+class Message:
+    def __init__(self, name, **kwargs):
+        self.loader = FileSystemLoader(path.join(here, 'templates'))
+        self.env = Environment(loader=self.loader)
+        self.name = name
+        self.params = kwargs
+    
+    @staticmethod
+    def make_hash(text):
+        hasher = md5()
+        hasher.update(text.encode('utf-8'))
+        return hasher.hexdigest()
+
+    @property
+    def render(self):
+        if  path.exists(path.join(here, 'templates', self.name + '.txt')):
+            file = self.name + '.txt'
+            template = self.env.get_template(file)
+            message = template.render(self.params)
+            return message.encode().replace(b'\n', b'\r\n')
+
+        else:
+            raise FileNotFoundError('Message not Found')
+
+    @render.setter
+    def render(self):
+        raise AttributeError('This message is not editable.')
+
+def parse_header(text):
+    length = len(text.split(':')) - 1
+    result = text.split(':', 1) if length else ['title', text]
+    chave, valor = result
+    return (chave.strip(), valor.strip())
diff --git a/pysip/templates/invite.txt b/pysip/templates/invite.txt
new file mode 100644
index 0000000..d6f2a2f
--- /dev/null
+++ b/pysip/templates/invite.txt
@@ -0,0 +1,30 @@
+INVITE sip:{{ from['user'] }}@{{ address['ip'] }}:{{ address['port'] }} SIP/2.0
+Via: SIP/2.0/UDP {{ address['ip'] }}:{{ address['port'] }};rport;branch={{ branch }}
+Max-Forwards: 100
+From: <sip:{{ from['user'] }}@{{ address['ip'] }}>;tag={{ from['tag'] }}
+To: <sip:{{ from['user'] }}@{{ from['domain'] }}>
+Call-ID: {{ callid }}
+Alg-test: 0
+CSeq: 1 INVITE
+Contact: <sip:{{ from['user'] }}@{{ address['ip'] }}:{{ address['port'] }}>
+User-Agent: PySIP
+Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE
+Supported: path, replaces
+Allow-Events: talk, hold, conference, presence, as-feature-event, dialog, line-seize, call-info, sla, include-session-description, presence.winfo, message-summary, refer
+Content-Type: application/sdp
+Content-Disposition: session
+Content-Length: 281
+
+v=0
+o=SIPPulse 1546586511 1546586512 IN IP4 {{ address['ip'] }}
+s=SIPPulse
+c=IN IP4 {{ address['ip'] }}
+t=0 0
+m=audio 17828 RTP/AVP 18 0 8 101
+a=rtpmap:18 G729/8000
+a=fmtp:18 annexb=no
+a=rtpmap:0 PCMU/8000
+a=rtpmap:8 PCMA/8000
+a=rtpmap:101 telephone-event/8000
+a=fmtp:101 0-16
+a=ptime:20
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..b98f660
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1 @@
+click
\ No newline at end of file
diff --git a/setup.py b/setup.py
new file mode 100644
index 0000000..859a3b3
--- /dev/null
+++ b/setup.py
@@ -0,0 +1,55 @@
+"""PySIP
+
+CLI para reealização de testes ligados a area de VoIP.
+"""
+from setuptools import setup, find_packages
+from os import path
+
+
+here = path.abspath(path.dirname(__file__))
+
+with open(path.join(here, 'README.md'), encoding='utf-8') as f:
+    long_description = f.read()
+
+setup(
+    name='PySIP',
+    version='0.1.3', 
+    description='CLI para testes em VoIP.',
+    include_package_data=True,
+    long_description=long_description,
+    long_description_content_type='text/markdown',
+    url='https://gitlab.sippulse.com/vitor/pysip/',
+    author='Vitor Hugo de Oliveira Vargas',
+    author_email='vitor.hugo@sippulse.com',
+    classifiers=[
+        'Development Status :: 1 - Planning',
+        'Environment :: Console',
+        'Intended Audience :: Information Technology',
+        'Intended Audience :: Telecommunications Industry',
+        'Natural Language :: Portuguese (Brazilian)',
+        'Operating System :: Unix',
+        'Programming Language :: Python :: 3.7',
+        'Topic :: Scientific/Engineering :: Information Analysis',
+        'Topic :: System :: Networking'
+    ],
+    keywords='VoIP, SIP, Telecomunicações',
+    packages=find_packages(exclude=['contrib', 'docs', 'tests']),
+    install_requires=[
+        'click',
+        'jinja2'
+    ],
+    extras_require={ 
+        'dev': [
+            'ipython'
+        ],
+    },
+    entry_points={
+        'console_scripts': [
+            'pysipctl=pysip:cli',
+        ],
+    },
+    #project_urls={
+    #    'Bug Reports': 'https://github.com/pypa/sampleproject/issues',
+    #    'Source': 'https://github.com/pypa/sampleproject/',
+    #},
+)
\ No newline at end of file