On Mon, 11 Feb 2008 06:02:01 -0800
Grant <[EMAIL PROTECTED]> wrote:

> > > I still can't send mail though, with or without authentication.
> > > I get this when port scanning with nmap:
> > >
> > > 25/tcp   filtered smtp
> > >
> > > Does that mean my host is blocking the smtp port?
> >
> > It's possible.  Or, perhaps you're behind a firewall without that
> > port open?
> 
> My local network firewall here?  All outgoing connections on this
> firewall are accepted.
> 
> > Many ISPs do block 25.  send me an IP if you want me to map from
> > here. Otherwise, I'm sure if it looks closed, and you have it open
> > on your end, it's got to be an ISP blockage.
> 
> When I nmap my remote server I get these filtered results:
> 
> 25/tcp   filtered smtp
> 130/tcp  filtered cisco-fna
> 131/tcp  filtered cisco-tna
> 132/tcp  filtered cisco-sys
> 133/tcp  filtered statsrv
> 134/tcp  filtered ingres-net
> 135/tcp  filtered msrpc
> 136/tcp  filtered profile
> 137/tcp  filtered netbios-ns
> 138/tcp  filtered netbios-dgm
> 139/tcp  filtered netbios-ssn
> 445/tcp  filtered microsoft-ds
> 3128/tcp filtered squid-http
> 4444/tcp filtered krb524
> 6881/tcp filtered bittorent-tracker
> 6969/tcp filtered acmsoda
> 
> So that all must be filtered by my ISP (Cox)?

Ouch, that's a cruel list.  Turning of torrents just goes to show the
massive misunderstanding of their nature and use.  

> > I recommend you use 587 (right?) the smtp submission port, with sasl
> > authentication, and ssl if possible.
> 
> What about your openvpn suggestion?  That would get around this
> problem right?  Plus it's a generally good practice?

Either is good; however you are going to need a different MX host for
your mail I'm afraid.  Since hosts can't connect to 25 they can't send
mail directly to you.  COX probably has provided an outgoing relay
host, but didn't expect their customers to be receiving their own mail.

jerks.  
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