Gavin,

Thanks very much for this thorough explanation. I appreciate your time.

However, I don't think it will work because they're also blocking all
outside ports. Port 80 and the port used for ftp are opened, but I doubt
they let any outgoing traffic on any other port. We really feel like in a
prison here...

Any other idea which would work on port 80? Although, now that I think about
it, port 80 is closed by Verizon, so I wouldn't be able to access my
PowerMac running OS X at home. I can't access my web site from work because
my web server at home uses port 8080. Darn!

-Laurent.
-- 
========================================================================
Laurent Daudelin                 Developer, Multifamily, ESO, Fannie Mae
mailto:[EMAIL PROTECTED]                Washington, DC, USA
************************ Usual disclaimers apply ***********************

On 27/02/04 15:43, "Gavin Tiplady" <[EMAIL PROTECTED]> wrote:

> Laurent,
> 
> If you have a Unix account on any box outside your firewall that CAN
> get to the mail server, and to which to you can make an ssh connection,
> then you could set up a secure tunnel from your Mac to that box, and
> read your mail as if it was served on your Mac.  Once you have the
> tunnel running you just configure your mail client to get mail from
> localhost (127.0.0.1).
> 
> All traffic running across the tunnel is encrypted which is a bonus.
> 
> The command to create the secure tunnel for POP mail (done in Terminal)
> takes the form
> 
> sudo ssh -L 110:<m>:110 -L 25:<m>:25 <b> -g -v -l <u>
> 
> where
> 
> <m> is the IP address or domain name of the external mail server
> <b> is that outside box that is going to come to your rescue and
> <u> is your username on the unix box <b>
> 
> [Pretty sure the command will need to be run via sudo because the ports
> in question are privileged]
> 
> e.g. sudo ssh -L 110:mail.myisp.com:110 -L 25:mail.myisp.com:25
> my.friendly.unix.box.com -g -v -l laurent
> 
> What that command is saying is to make a tunnel that creates ports 25
> and 110 locally, and run a connection out via the box
> "my.friendly.unix.box.com" into ports 25 and 110 of the external mail
> server "mail.myisp.com".  You can visualize a duplex cable connecting
> the needed ports on the mail server, via the box b, into your Mac, thus
> allowing you to send and receive mail using localhost.  Leave your mail
> account and password details the same as they are now, because of
> course in reality it is the external mail server that is validating
> them.
> 
> Just create the ports you normally use - e.g. 25,110 for POP and 25 and
> either 143 or 993 for IMAP.
> 
> You can of course forward any port this way - e.g. port 80 to get to
> blocked web sites.
> 
> All built into Mac OS X, but if you're not using a Mac inside the
> firewall, but a Windows box, you can do a similar thing using the
> freeware tool 'putty'.
> 
> Gavin Tiplady
> 
> Home/Work/Fax (+61) 2-9412-1931
> Mobile (+61) 412-214-343
> MSN: [EMAIL PROTECTED]
> AIM/iChat [EMAIL PROTECTED]
> Skype: gavintiplady
> 
> ________________________________________________________
> 'Yes,' said Joseph, 'and I was sitting at home looking for Ephesians,
> and says I to myself, "'Tis nothing but Corinthians and Thessalonians
> in this danged Testament," when who should come in but Henery
> there: "Joseph," he said, "the sheep have blasted theirselves -" '
> On 28/02/2004, at 5:09 AM, Laurent Daudelin wrote:
> 
>> The security folks here again have strike: I can no longer use
>> mail2web to
>> read my personal email form behind the firewall. I can not even get my
>> mail
>> using the Verizon web site, so they're not only blocking some specific
>> sites
>> (although it could still be possible), but I think they're blocking
>> something in the TCP/IP request.
>> 
>> Anybody knows a workaround, besides finding another job?
>> 
>> -Laurent.



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