diff --git a/alertserver/config.py b/alertserver/config.py
new file mode 100644
index 0000000..94f90ee
--- /dev/null
+++ b/alertserver/config.py
@@ -0,0 +1,8 @@
+import configparser
+from easydict import EasyDict
+
+_config = configparser.ConfigParser()
+_config.read('config.sample.ini')
+
+Bitbucket = EasyDict(_config['Bitbucket'])
+Trello = EasyDict(_config['Trello'])
\ No newline at end of file
diff --git a/alertserver/config.sample.ini b/alertserver/config.sample.ini
new file mode 100644
index 0000000..e103eae
--- /dev/null
+++ b/alertserver/config.sample.ini
@@ -0,0 +1,8 @@
+[Bitbucket]
+TRUSTED_REMOTE_ADDRS = 104.192.143.192/28, 104.192.143.208/28
+WEBHOOK_PATHS = /webhook, /webhook2
+WEBHOOK_HOST = 0.0.0.0
+WEBHOOK_PORT = 5000
+
+[Trello]
+c = 30
\ No newline at end of file
diff --git a/alertserver/server.py b/alertserver/server.py
index aa2427f..8df5014 100644
--- a/alertserver/server.py
+++ b/alertserver/server.py
@@ -1,62 +1,57 @@
-from flask import Flask, abort, request
+import re
+from functools import reduce
+from ipaddress import ip_network as parse_addr
+
+from flask import Flask
+from flask import abort
 from flask import request
 
+from alertserver.config import Bitbucket as config_bitbucket
+
 app = Flask(__name__)
 
-# 104.192.143.192/28
-# 104.192.143.208/28
-trusted_remote_addrs = list(map(
-    lambda last: '104.192.143.' + str(last),
-    list(range(192, 192 + 16)) + list(range(208, 208 + 16))
+trusted_remote_addrs = list(reduce(
+    lambda l1, l2: l1 + l2,
+    map(
+        lambda addr_str: [str(network) for network in parse_addr(addr_str)],
+        re.sub(r'\s', '', config_bitbucket.trusted_remote_addrs).split(',')
+    )
 ))
 
-BITBUCKET_WEBHOOK_PATH = '/webhook'
 
-webhook_paths = [
-    BITBUCKET_WEBHOOK_PATH,
-]
+def is_trusted_remote_addrs(addr):
+    return addr in trusted_remote_addrs
 
 
-@app.before_request
-def limit_remote_addr():
-    """Block all request if request's path is heading to limited path with non-trusted remote address."""
-    if (is_webhook_path(request.path) and
-            not is_trusted_remote_addrs(request.remote_addr)):
+def webhook_routine():
+    if not is_trusted_remote_addrs(request.remote_addr):
         abort(403)
 
+    data = request.get_json()
 
-def is_webhook_path(path):
-    return path in webhook_paths
-
-
-def is_trusted_remote_addrs(remote_addr):
-    return remote_addr in trusted_remote_addrs
-
-
-@app.route(BITBUCKET_WEBHOOK_PATH, methods=['GET', 'POST'])
-def tracking():
-    if request.method == 'POST':
-        data = request.get_json()
+    commit_author = data['actor']['username']
 
-        commit_author = data['actor']['username']
+    is_branch_created = data['push']['changes'][0]['created']
+    is_branch_closed = data['push']['changes'][0]['closed']
+    if is_branch_created:
+        # TODO: Alert branch created.
+        print('Webhook received! %s created branch' % commit_author)
+        pass
+    elif is_branch_closed:
+        # TODO: Alert branch closed.
+        print('Webhook received! %s deleted branch' % commit_author)
+    else:
+        # TODO: Alert commits.
+        commit_hash = data['push']['changes'][0]['new']['target']['hash'][:7]
+        commit_url = data['push']['changes'][0]['new']['target']['links']['html']['href']
+        print('Webhook received! %s committed %s' % (commit_author, commit_hash))
+    return 'OK'
 
-        is_branch_created = data['push']['changes'][0]['created']
-        is_branch_closed = data['push']['changes'][0]['closed']
-        if is_branch_created:
-            # TODO: Alert branch created.
-            print('Webhook received! %s created branch' % commit_author)
-            pass
-        elif is_branch_closed:
-            # TODO: Alert branch closed.
-            print('Webhook received! %s deleted branch' % commit_author)
-        else:
-            # TODO: Alert commits.
-            commit_hash = data['push']['changes'][0]['new']['target']['hash'][:7]
-            commit_url = data['push']['changes'][0]['new']['target']['links']['html']['href']
-            print('Webhook received! %s committed %s' % (commit_author, commit_hash))
 
-        return 'OK'
+webhook_paths = re.sub(r'\s', '', config_bitbucket.webhook_paths).split(',')
 
+for webhook_path in webhook_paths:
+    app.route(webhook_path, methods=['POST'])(webhook_routine)
 
 if __name__ == '__main__':
-    app.run(host='0.0.0.0', port=5000, debug=True)
+    app.run(host=config_bitbucket.webhook_host, port=int(config_bitbucket.webhook_port), debug=True)
diff --git a/requirements.txt b/requirements.txt
index 71f70e1..2e06385 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,5 @@
 click==6.6
+easydict==1.6
 Flask==0.11.1
 itsdangerous==0.24
 Jinja2==2.8