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firewall script - attempt 1 #1

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firewall script - attempt 1 #1

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17 changes: 17 additions & 0 deletions firewall.py
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Original file line number Diff line number Diff line change
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from systemd import journal
import re
import pyufw as ufw

j = journal.Reader()
j.this_boot()
j.log_level(journal.LOG_INFO)
j.add_match(_SYSTEMD_UNIT="ssh.service")
ip_add = set()

for attempt in j:
message = attempt['MESSAGE']
if message.startswith('Failed'):
ip_add.update(re.findall(r'\b(?:\d{1,3}\.)}3|\d{1,3}\b', message))

for ip in ip_add:
ufw.add("deny from " + ip)