Checkpoints can be used for entering or leaving the country and can be based in land and sea

There are land ports of in / out and seaports of in / out

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Note added at 17 hrs (2013-10-02 01:29:35 GMT)
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reliant on the context, whether it's pertinent to city/country limits/boarder I feel that "point of entry, or departure" may also be used...for a boarder entry/exit point with a neighboring country.

Another option would be "boarder crossing" inland, and "ports" for the seaside.

Hi there
I believe what is meant by this term is access and entry points.

Feel free to check references links
http://www.almaany.com/home.php?language=arabic&word=منفذ&la...
http://www.frommers.com/destinations/rockymountainnationalpa...

Hopefully that would be of any help :)

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Note added at 2 days22 hrs (2013-10-04 05:46:30 GMT)
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Hi Fida, basicly there is no 100% similar meaning of any two words although they would seam so which is our problem here.
منفذ is more general than entry, it may include entry, checkpoint or route or any unofficial way to get in or natural passage to access a place
while مدخل is narrower in meaning, usually indicates point of entry especially a man made ones.
the way i see it, منفذ is the way while مدخل is the gate

Feel free to check references links
http://www.almaany.com/home.php?language=arabic&word=منفذ&la...
http://www.almaany.com/home.php?language=arabic&word=مدخل&la...
http://www.thefreedictionary.com/access
http://www.macmillandictionary.com/dictionary/british/access
http://www.thefreedictionary.com/entry
http://www.macmillandictionary.com/dictionary/british/entry

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Note added at 3 days6 hrs (2013-10-04 13:44:35 GMT)
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Hi Fida, there is a difference between our منفذ and "نفذ" in holy quran as you know any word can bear many meanings and نفذ in quran mainly means "أخترق"

Also access bear the meanning of outage or "مخرج " and you may check that from the meannings of "منفذ " in my perviously provided link.so it's kindly service your interpretaion of منفذ as well

Finally i am not saying in any way that my answer is 100% right but it's the one that i would opt for as my understanding to the meaning from the available context

Feel free to check references links
http://www.almaany.com/home.php?language=arabic&word=منفذ&la...
http://aljsad.com/forum50/thread137235/
http://ejabat.google.com/ejabat/thread?tid=1cde0793e9ab5419
http://www.tawtheegonline.com/vb/showthread.php?t=36702