[CentOS] unreachable peer

[Anthony K]

On 17/05/15 03:23, Leon Fauster wrote:
> Am 15.05.2015 um 18:17 schrieb Gordon Messmer <gordon.messmer at gmail.com>:
>> On 05/15/2015 09:02 AM, Leon Fauster wrote:
>>> So, the destination is not responding with SYN,ACK when the connection passes
>>> our router. But as I said it is reachable from my home, and this is confusing.
>>>
>>>
In such situations, I use HPING in the following manner:
hping3 -n -T -S -p 443 yy.yy.yy.yy

Breakdown:
-n - do not do DNS resolution
-T - traceroute mode
-S - send SYN packet (you should see flags=SA in the output for a reachable machine)
-p - the destination port - 443 in this case

You can a -t ## to start off with a larger tty than the default 0.


Cheers,
ak.