Maybe a bit of ignorant question; but i always used to think that
access-list 170 permit tcp any any telnet

would cover telnet both ways. i.e. it does not matter which range is any so it 
can from *inside* your network our *outside* your network, still going to the 
same destination telnet port

but it seems for return traffic we also need to define
access-list 170 permit tcp any eq telnet any

why? the source port is dynamic right ? why would that need to be specified? it 
would not be 23 so what's the point?

Can anyone enlighten me ?

Kind regards,
Alef
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