Re: Help - How to block port 80 (outgoing)

[Mike Burger <mburger bubbanfriends org>]

Well, I guess the next question is "Is it possible that ipchains is 
running?"

The reason I asked about the potential firewall is that I thought there 
could be an option to use a proxy.  My job pretty much blocks all outgoing 
traffic, and I have to point my browsers at a proxy, and telnet to proxy 
to telnet out.

On Sun, 29 Dec 2002, Mike Galloway wrote:

> There is no external firewall.  I am just looking for possible ways you 
> might block an outgoing port inside RH Linux.  Somehow the kernel or an 
> application is blocking the outgoing connection from within the OS.
> 
> Is there something else besides IPTABLES that you can use to block outgoing 
> ports?
> 
> Thanks
> 
> 
> At 03:28 PM 12/29/2002 -0500, you wrote:
> >Is there another firewall in place...on an actual dedicated firewall of
> >some sort, on your network?
> >
> >On Sun, 29 Dec 2002, Mike Galloway wrote:
> >
> > > For some reason, I cannot get out of my system using wget, curl, or even
> > > telnet via
> > > port 80.  All programs responds with (no route to host).  I believe there
> > > is some type of firewall or port blocking mechanism that is blocking all
> > > traffic outbound to port 80.
> > >
> > > So I am asking how to block a port so I can check if that has been done.
> > > I am running RH 7.2
> > >
> > > If I use wget or curl to port 443 (secure) it works.  If I ping to a host,
> > > it works, just port 80 is
> > > affected.
> > >
> > > Here is output from     iptables -L
> > >
> > > [root ns1 mike]# /sbin/iptables -L
> > > Chain INPUT (policy ACCEPT)
> > > target     prot opt source               destination
> > >
> > > Chain FORWARD (policy ACCEPT)
> > > target     prot opt source               destination
> > >
> > > Chain OUTPUT (policy ACCEPT)
> > > target     prot opt source               destination
> > >
> > >
> > >
> > >
> >
> >--
> >Mike Burger
> >http://www.bubbanfriends.org
> >
> >Visit the Dog Pound II BBS
> >telnet://dogpound2.citadel.org or http://dogpound2.citadel.org:2000
> >
> >
> >
> >--
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> 
> 
> 
> 

-- 
Mike Burger
http://www.bubbanfriends.org

Visit the Dog Pound II BBS
telnet://dogpound2.citadel.org or http://dogpound2.citadel.org:2000