Get blockhosts, it works very well across multiple services using multiple methods: https://www.aczoom.com/archive-2016/blockhosts/
mark On Mon, May 28, 2018 at 1:16 PM, Ken D'Ambrosio <k...@jots.org> wrote: > Hey, all. I belong to the last of a dying breed, a bulletin board. (No, > we no longer do dialup; it's accepted telnet since '90 or so.) And it's > currently under the purview of someone, though he hasn't been able to > give it the attention it needs, so I think it's about to go to Digital > Ocean. (Indeed, as I type this, it's offline -- which is responsible > for the whole line of thinking for this e-mail.) Migration would > normally be unremarkable, and not require an e-mail here, but... the > damn Russian botnet problem (the one that brought Dyn down last year) > has also caused us an issue. The current admin has largely mitigated it > through blacklists, but I was wondering if there might be a more > graceful approach. Issue: the botnet attempts to expand by searching > for other embedded devices (generally, cameras)... by way of port 23. > Telnet. At any given time, we may have a dozen bogus connections from > botnets, all trying to log in as "admin". Of course, they fail, but > they chew up ports, and seem to even have uncovered a bug in the BBS > code, just by raw number of connections. Can anyone think of a way to > act as a proxy and: > * Accept a telnet connection > * Offer a login prompt > * Reject/close the connection if the username offered is "admin" > * Forward on the connection/credentials and act as a proxy if it's > literally anything else? > > I've taken a stab at it in Ruby, but seem to have issues understanding > exactly how the telnet module works... > > Thanks kindly for any thoughts or insights, > > -Ken > > P.S. If/when it comes back up: telnet://bbs.iscabbs.com if you're that > interested in logging in like it's 1993. Apologies to Prince. > _______________________________________________ > gnhlug-discuss mailing list > gnhlug-discuss@mail.gnhlug.org > http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/ >
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