{"id":269,"date":"2019-10-09T21:59:55","date_gmt":"2019-10-09T13:59:55","guid":{"rendered":"https:\/\/www.theinsecurewire.com\/?p=269"},"modified":"2019-10-09T21:59:55","modified_gmt":"2019-10-09T13:59:55","slug":"using-python-paramiko-to-automate-commands-on-palo-alto-pan-os","status":"publish","type":"post","link":"https:\/\/www.insecurewi.re\/index.php\/2019\/10\/09\/using-python-paramiko-to-automate-commands-on-palo-alto-pan-os\/","title":{"rendered":"Using Python Paramiko to automate commands on Palo Alto PAN OS"},"content":{"rendered":"

So Palo Alto TAC recently confirmed to me that PAN OS 9.0.3 has a bug wherein the proxydnsd service will max the management CPU even if your not using proxy DNS. <\/p>\n

It is slated for a fix in November’s release of 9.0.5, however I would rather not have the management CPU constantly maxed. So to fix this problem I created a Python script with the Paramiko library for SSH connectivity. This allows you to automate CLI commands via Python. Since the command to restart the proxydnsd service is a debug command, you can’t use the PA API, it has to be done from the CLI. <\/p>\n

I run this python script using Python 2.7 on a Ubuntu Linux VM. You will need to pip install paramiko and pip install time.
\n
\n#
\n# Log into PAN Firewall via SSH and restart DNS Proxy
\n# which is causing mgmt cpu spike on PAN OS 9.0.3
\n# Requires Python 2.x
\n# Setup crontab schedule to automatically execute
\n#
\nimport paramiko
\nimport time<\/p>\n

USERNAME = 'username'
\nPASSWORD = 'password'
\nHOSTNAME = '192.168.0.1' #Firewalls IP
\nPORT = 22<\/p>\n

def ssh_command(username=USERNAME, password=PASSWORD, hostname=HOSTNAME, port=PORT):
\n ssh_client = paramiko.SSHClient()
\n ssh_client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
\n ssh_client.load_system_host_keys()
\n ssh_client.connect(hostname, port, username, password)
\n remote_conn = ssh_client.invoke_shell()
\n #print (\"Interactive SSH session established\")
\n remote_conn.send(\"debug software restart process dnsproxy\\n \")
\n time.sleep(8)
\n remote_conn.send(\"exit\\n \")<\/p>\n

if __name__ == '__main__':
\n ssh_command()
\n<\/code><\/p>\n

You can download the script from my Github<\/a> page. I setup crontab to run the script at 20 minute intervals:
\n1. Make sure your script is working first (you have filled out the username, password and hostname fields and it executes correctly with python 2.x).
\n2. crontab -e
\n Select 1. for Nano
\n3. Add a new line like so:
\n*\/20 * * * * python \/path\/to\/PADebugCmd.py<\/code>
\nWhere \/path\/to is your directory path to the script file.<\/p>\n","protected":false},"excerpt":{"rendered":"

So Palo Alto TAC recently confirmed to me that PAN OS 9.0.3 has a bug wherein the proxydnsd service will max the management CPU even…<\/p>\n","protected":false},"author":2,"featured_media":368,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[28],"tags":[57,139,141,143,151],"class_list":["post-269","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-firewall","tag-automation","tag-palo-alto","tag-pan-os","tag-paramiko","tag-python"],"acf":[],"yoast_head":"\nUsing Python Paramiko to automate commands on Palo Alto PAN OS - Insecure Wire<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.insecurewi.re\/index.php\/2019\/10\/09\/using-python-paramiko-to-automate-commands-on-palo-alto-pan-os\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" 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