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Re: SMTP spoofing ?
In article <[email protected]>, John R Levine <[email protected]> wrote: >Are there any routers currently available that can do port 25 spoofing for >dialup users? That is, when the user attempts to connect to port 25 >anywhere, he in fact connects to port 25 on your own SMTP server instead. Cisco? Just setup a routemap with an access list that matches TCP port 25, and sets next-hop to a box that supports `transparent proxying'. Linux does, and AFAIK the *BSD's can do it as well. Some squid users are doing this with port 80 to redirect HTTP traffic through the caching proxy - there's some docs for it on http://squid.nlanr.net/ in the FAQ, read the section about "transparent proxying". However I think that policy routing is still process switched, and as such can use a lot of CPU on the router. Mike. -- Miquel van Smoorenburg | The dyslexic, agnostic, insomniac lay in his bed [email protected] | awake all night wondering if there is a doG