can not connect to or IP addr port 80

Matthias Apitz guru at
Mon Aug 1 19:53:53 UTC 2016

El día Monday, August 01, 2016 a las 12:36:47PM -0700, Cary escribió:

> > none of the WLAN workstations can reach at port 80; the
> > command
> > 
> > telnet 80
> > 
> > shows resolving to the IP addr, but does not connect; a tcpdump
> > shows only SYN pkg going out to but no SYN answer is coming in.
> > This is as far as I can see the only side which is not reachable, all other
> > port 80, 443 and SSH 22 to anywhere is just fine;
> > 
> > Any ideas what could be wrong? I'm afraid, when I contact my ISP (a German
> > local telephone provider) they will ask me if I have the latest Win7 patch
> > installed ... :-)
> > 
> > matthias
> > 
> hello Matthias,
> Today I also noticed, just after fetching ports with portsnap(8) ,
> that wasn't responding.  It is back now afaict.

To make this clear: I was able at the same time to reach the IP
addr from other points (for example from my mobile phone),
but not from my WAN addr; and I do not have a firewall
block for port 80 for; the only options I can think off are

a) a routing issue from to
b) a block in based on the source addr


Matthias Apitz, ✉ guru at, ⌂  ☎ +49-176-38902045
"Wer übersieht, dass wir uns den anderen weggenommen haben und sie uns wiederhaben wollen,
kann von den Kämpfen der letzten Tage keinen verstehen. Und kann natürlich auch keinen
dieser Kämpfe bestehen." Hermann Kant in jW 1.10.1989

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