Have you tried to make an outgoing ssh connection anyway? You might be pleasantly surprised.
Try this in Terminal:
ssh permanentmailbox.com
That will try to go to my home network here: if you get a login prompt - or something showing that it at least got outside the firewall - then the method will work. (Then you could use your home Mac as the friendly box, perhaps setting up a freebie dyndns name for it to overcome its IP address changing all the time if that were an issue..).
Anyway I'll keep thinking about it assuming only port 80 and 21 are open, but can't promise anything!
cheers, GT
On 28/02/2004, at 7:56 AM, Laurent Daudelin wrote:
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
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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