how about telnet yourself via the lo interface? Is there something different then? ------------ Banyan He Blog: http://www.rootong.com Email: banyan at rootong.com On 2012-11-22 12:40 AM, Markus Falb wrote: > Hi, > I am trying to get ipv6 firewall running. I did a very simple ip6tables > rules and noticed very long running yum updates. I think that happened > because firewall is dropping outgoing packets to port 80. Well, I > thought to mitigate the issue and changed outgoing from drop to reject. > > Now I try manually > > # strace telnet 2a02:180:ffff:1::551f:b966 80 > ... > connect(3, {sa_family=AF_INET6, sin6_port=htons(80), inet_pton(AF_INET6, > "2a02:180:ffff:1::551f:b966", &sin6_addr), sin6_flowinfo=0, > sin6_scope_id=0}, 28 > > 3 second delay > > ) = -1 ECONNREFUSED (Connection refused) > ... > > The ECONNREFUSED is quite expected of course, but what is not expected > that the connect syscall lasts 3 seconds. This 3 second delay is not > happening with a equivalent telnet to a IPv4 address. > > Why is this 3 second delay?