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improve auto detection of IPv6 - try to check sysctl net.ipv6.conf.all.disable_ipv6 (prefer value read from /proc/sys/net/ipv6/conf/all/disable_ipv6)

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This commit is contained in:
sebres 2023-01-09 16:21:36 +01:00
parent 58834b6734
commit d8a9812adc
1 changed files with 7 additions and 0 deletions
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7
fail2ban/server/ipdns.py
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@ -212,6 +212,13 @@ class DNSUtils:
def _IPv6IsSupportedBySystem():
if not socket.has_ipv6:
return False
# try to check sysctl net.ipv6.conf.all.disable_ipv6:
try:
with open('/proc/sys/net/ipv6/conf/all/disable_ipv6', 'rb') as f:
# if 1 - disabled, 0 - enabled
return not int(f.read())
except:
pass
s = None
try:
# try to create INET6 socket: