LARTC - Feb 2006 - classifying packets and ports

Hi,

I''ve been working for a big corporate company as junior system engineer
and
getting nicely to understand HTB/iproute2/iptables etc,
The ordinary users(about 500 users), can pop / smtp / skype out on the
network, but I can''t ssh out, cause they blocked the ports. Thought of
being
clever, I let my home linux listen on port 443 or 110 for ssh connection,
but it wont connect, I  even test it using telnet and it show up ssh, but it
wont connect with my ssh client, but normal pop and https works. How do they
block my ssh connection on port 443, but normal https work?
Do they use TOS with iptables?,, bit of a brain teaser for me

Thanks

Sew


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maybe they uses layer-7 to classify traffic

Thomas

2006/2/5, the sew <sewlist@gmail.com>:
> Hi,
>
> I''ve been working for a big corporate company as junior system
engineer and
> getting nicely to understand HTB/iproute2/iptables etc,
> The ordinary users(about 500 users), can pop / smtp / skype out on the
> network, but I can''t ssh out, cause they blocked the ports.
Thought of being
> clever, I let my home linux listen on port 443 or 110 for ssh connection,
> but it wont connect, I  even test it using telnet and it show up ssh, but
it
> wont connect with my ssh client, but normal pop and https works. How do
they
> block my ssh connection on port 443, but normal https work?
> Do they use TOS with iptables?,, bit of a brain teaser for me
>
> Thanks
>
> Sew
>
> _______________________________________________
> LARTC mailing list
> LARTC@mailman.ds9a.nl
> http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
>
>
>