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Enhanced Google domain detection in apache-fakegooglebot

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Previously, an attacker could fake a domain like
crawl-1-1-1-1.googlebot.com.fake.net and get resolved. This change
avoids to resolve fake Google domains.
This commit is contained in:
Pablo Rodriguez Fernandez 2015-10-19 09:13:05 +02:00
parent 7e6964dd9d
commit 74fcb219ab
1 changed files with 1 additions and 1 deletions
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2
config/filter.d/ignorecommands/apache-fakegooglebot
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@ -26,7 +26,7 @@ def is_googlebot(ip):
from fail2ban.server.filter import DNSUtils
host = DNSUtils.ipToName(ip)
if not host or not re.match('crawl-.*\.googlebot\.com', host):
if not host or not re.match('crawl-.*\.googlebot\.com$', host):
sys.exit(1)
host_ips = DNSUtils.dnsToIp(host)
sys.exit(0 if ip in host_ips else 1)