dup loop: /d[y]oop loop/ (also `dupe loop') n. [FidoNet] An
infinite stream of duplicated, near-identical messages on a FidoNet
echo, the only difference being unique or mangled identification
information applied by a faulty or incorrectly configured system or
network gateway, thus rendering dup killers ineffective. If such
a duplicate message eventually reaches a system through which it has
already passed (with the original identification information), all
systems passed on the way back to that system are said to be
involved in a dup loop.
![[prev]](../gif/left.gif){kind=small}
![[up]](../gif/up.gif){kind=small}
![[next]](../gif/right.gif){kind=small}