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adejoode+usenet@sabotage.org (Alex de Joode) wrote:
>lon <Anonymous-Remailer@see.comment.header> wrote:
>: adejoode+usenet@sabotage.org (Alex de Joode) wrote:
>: >lon <Anonymous-Remailer@see.comment.header> wrote:
>: >
>: >: I've been having a strange experience using remailers for Usenet
>: >: posting lately. Certain posts do no show up even when sent
>: >: 4-6 times thru different chains, with different exit remailers and
>: >: varying combinations of M2N gateways. Stats show all remailers
>: >: used as up and running with good reliability. They only thing I
>: >: can figure is that something is happening at the M2N level.
>: >: Possibly gateways are under some sort of attack, or maybe
>: >: multiple gateways are out of service. Has anybody else
>: >: had similar problems in the past day or two?
>: >
>: >dizum m2n, isn't under attack nor is it unavailable ....
>: >
>: >So probably user-error.
>: >
>: Not likely, I'm a *very* experienced user, who under normal
>: circumstances is able to get posts up to Usenet without
>: having to send them multiple times.
>
>
>: >Anything special in the post that do not make it ?
>: >
>: > ie: - longer lenght ?
>: > - trying to post multiple copies to multiple groups ?
>: > - other groups than normal etc ...
>
>: No, there was nothing different about them compared to my
>: past posting patterns. I don't try to post binaries. My
>: maximum post length is about 20kb.
>
>Do you have subject-line/msg-is/newsgroup/posting-date so I can
>check to see if we received it, and if yes what we did with it ?
>
>(mail me privately, I'll reply here)
>
It's rather difficult to sort out now exactly which messages - out of
several, each of which was re-sent multiple times - might have
had dizum as one of the m2n gateway destinations. Some went
to Dingo as the anon-post-to remailer, and I think Dingo has been using
dizum exclusively for posting, but I'm not absolutely certain of
that.
Anyway, things seem to have returned to normal since I had the
problems mentioned above. I do have a related question, though.
At times in the past I have noticed that posts on certain subject
matter would not appear on Usenet even though sent multiple
times using different remailers. Therefore, the situation could
not have resulted from any particular remailer screening on
content. So, I began to wonder whether screening/blocking
could be taking place at the m2n level. I don't mean deliberately
by the m2n operator, but as a sort of limited denial of service
attack. Could an attacker with the right network access grab
all the traffic bound for an m2n gateway and kill posts with
certain keywords and allow the remainder of traffic to flow on
to the gateway? That sort of capability could be more useful
to an attacker/censor than doing a massive DoS attack and
bringing down m2n gateways entirely.
-=-
This message was posted via two or more anonymous remailing services.
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