You can turn off IPv6 on a particular interface with net.ipv6.conf.eth0.disable_ipv6 = 1
Or totally by putting install ipv6 /bin/true in /etc/modprobe.d/50-ipv6.conf You may have to do that if parts of your network aren't ready for it yet. -----Original Message----- From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Michael Weiner Sent: Thursday, October 29, 2015 8:06 AM To: LINUX-390@VM.MARIST.EDU Subject: [LINUX-390] DNS Question Hi all, I am working on a DNS on SLES 11 SP3 using BIND. I got the DNS working where I can ping my entries etc. But I am getting the following errors which looks like IPv6. 172.16.1.182 is my local laptop DHCP address. Any suggestions? Oct 29 06:28:58 dnsserver named[22031]: network unreachable resolving '182.1.16.172.in-addr.arpa/PTR/IN': 2001:503:c27::2:30#53 Oct 29 06:28:58 dsnserver named[22031]: network unreachable resolving '182.1.16.172.in-addr.arpa/PTR/IN': 2001:500:2d::d#53 Oct 29 06:28:58 dsnserver named[22031]: network unreachable resolving '182.1.16.172.in-addr.arpa/PTR/IN': 2001:503:ba3e::2:30#53 Oct 29 06:28:58 dsnserver named[22031]: network unreachable resolving './NS/IN': 2001:503:c27::2:30#53 Oct 29 06:29:01 dsnserver named[22031]: network unreachable resolving './NS/IN': 2001:500:2d::d#53 Oct 29 06:29:04 dsnserver named[22031]: network unreachable resolving './NS/IN': 2001:dc3::35#53 Oct 29 06:29:04 dsnserver named[22031]: network unreachable resolving './NS/IN': 2001:503:ba3e::2:30#53 Oct 29 06:29:04 dsnserver named[22031]: network unreachable resolving './NS/IN': 2001:500:3::42#53 Oct 29 06:29:04 dsnserver named[22031]: network unreachable resolving './NS/IN': 2001:500:2f::f#53 Oct 29 06:29:04 dsnserver named[22031]: network unreachable resolving './NS/IN': 2001:7fe::53#53 Oct 29 06:29:04 dsnserver named[22031]: network unreachable resolving '182.1.16.172.in-addr.arpa/PTR/IN': 2001:dc3::35#53 Oct 29 06:29:09 dsnserver named[22031]: client 10.100.0.191#38658: query: 182.1.16.172.in-addr.arpa IN PTR + Oct 29 06:29:22 dsnserver named[22031]: network unreachable resolving './NS/IN': 2001:7fd::1#53 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/