The sourceport from a host you are running the telnet client
from is a random non-prived port, not 23.
>
> Quick question as the night as late and this has to be ready to go asap:
>
> On a livingston one explicitely permits, everything else is denied. If I
> set the filter to read like this
> filter s1.in 6 permit src_addr/bits dst_addr/bits tcp src eq 23 dst eq 23
> it means that from the source address ot the dest ination address filter
> inbound on tcp against packets coming from port 23 to 23. With this ruleset
> implace, if I telnet from the src (explicitly declared) to the destination
> (also explicitly declared) the response is no route to host. If I strike
> "dst eq 23" and leave "tcp src eq 23" I get no route to host. If I leave
> dst...then I can telnet through. Why is that?
>
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