If I ping tools.cisco.com it is successful via ipv4:
ROUTER# ping tools.cisco.com
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 126.96.36.199, timeout is 2 seconds:
Success rate is 100 percent (5/5), round-trip min/avg/max = 62/62/63 ms
But if I try to telnet to tools.cisco.com port 443 I get an ipv6 name lookup! I'm not running ipv6 anywhere on this router:
ROUTER#telnet tools.cisco.com 443
Trying 2001:420:1101:5::A, 443 ...
% Destination unreachable; gateway or host down
What the heck is going on?
ip name-server <my internal dns ipv4 address>
ip domain lookup source-interface Loopback0
ip domain name <my internal domain name>
http client source interface Loopback0
ip address 10.255.0.136 255.255.255.255
note ipv6 should never be used in homes or small busness it is huge security probem. as for most part it cant be control. i did say for most part. in fack rasomware depends on ipv6 but can fall back to ipv4 if coded to do it. ipv6 was set up to hide who was behind the address as it dose not use dns, throw it can i had set up 1000s of domains and helping microsoft microsoft allways removed ipv6 out the dns for the domain ask why? as makes no sence, ipv6 should only be used by them who can contain it and them who dont understand it turn it off, i done computers 30 years i never used ipv6 i trun off where can be trun off . by turning it off everything defaults back to ipv4 note if u on swich name the router in host file with ipv4 address it should only use that address
throw i got quistion why is call-home unconfig useing any protocall ?