[CentOS] ip6tables REJECT target 3s timeout

Fri Nov 23 17:18:56 UTC 2012
Markus Falb <markus.falb at fasel.at>

On 22.11.2012 12:21, Markus Falb wrote:
> On 21.11.2012 17:40, Markus Falb wrote:

>> 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

> There are 2 destination unreachables sent, one immediate and the second
> after 3 seconds. There are also 2 log entries from ip6tables. It looks
> like the connect() is really trying a second time.

btw, on CentOS 6 the timeout is 1 second instead of 3, but the questions
remains the same.

Why is a retry necessary? The kernel says no, but it is retried anyways.
Why? Is it CentOS/RHEL specific?

I realize that I got not many answers. Do you know of a better place to
ask such things?
Kind Regards, Markus Falb