> Ainsi parlait Ken Thompson : >> On Monday 11 August 2003 10:24 am, Guillaume Rousse wrote: >> > Ainsi parlait Ken Thompson : >> > > How are they getting my personal IP when I'm connecting through a >> firewall? >> > >> > Cause they are in the mail enveloppe headers. >> > >> > > Does Kmail send this info somehow and if so, how can it be turned >> off? >> > >> > It can't, it wouldn't be RFC compliant otherwise. >> >> This seem to go against what I thought was one of the reasons for >> having a firewall in the first place. I don't understand why email >> needs to send the specific machine IP address. > You're confusing. A firewall works essentially at transport level (IP), > whereas you're dealing here with application level (SMTP) problems. When > you want to masquerade your IP adresses on the web, the easiest way is > to use an HTTP proxy, not a firewall. The same goes for mail, the > easiest way is to use a SMTP gateway. > >> >> > If you really care, install a SMTP server and perform headers >> rewriting. >> >> Can't, ISP limitations. > Your ISP can block external connections on port 25, but can't prevent > you from listening your own network. > -- > Guillaume Rousse > In any human endeavor, once you've exhausted all possibilities and fail, > there will be one solution, simple and obvious, highly visible to > everyone else > -- SNAFU Equations (JB's Scholastic Laws) n�5
This brings up an interesting question. My ISP blocks all outgoing port 25 connections as well as incoming. Is there anyway to use a local SMTP server in this situation, or won't it be blocked when it forwards the mail on? My work just implimented the same block, so it would be nice to know if there is a way around it. Just wondering... Thanks Scott
