Why so we see DNS requests when accessing a service, when using tcpwrappers, while we only use IPs in the tcpwrappers config?
Issue
"ALL:[::1]" was defined in the first line of /etc/hosts.allow. When the "snmpwalk -v 1 -c public
We think that name resolution to DNS server should not occur because we defined only IP address(IPv6) in /etc/hosts.allow. When we defined only IP address(IPv4) in /etc/hosts.allow, the request did not occur.
Please tell us the reason why name resolution to DNS server occurred when only the IP address(IPv6) was defined in /etc/hosts.allow.
# cat /etc/hosts.allow
ALL : [::1]
Environment
- Red Hat Enterprise Linux (RHEL)
- tcp wrappers used
Subscriber exclusive content
A Red Hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions.
Welcome! Check out the Getting Started with Red Hat page for quick tours and guides for common tasks.
