People here prefer that you try to find your own answers as much as possible,
and when you ask something, you need to consider their answers carefully,
because if you dont, you are wasting their time.
Stu said:
Just reread your post. You asked two questions, and Marcell's answer applies to both of them.
So, what questions did you ask?
Does the same hold true for the "standard" client UDP port 4672?
Marcell answers: "Yes."
So:
Yes, its advisable to use a "non-standard" client UDP port
Yes, many ISPs filter port 4672
Your second question is basically a repeat of the first half of your previous question:
Should I also use a "non-standard" port ... for the extended client UDP port?
So, the answer to that question is identical too: "Yes."
So that in your last post, your first question has already been asked twice,
and has been answered by Marcell,
which has been confirmed by Stu.
And the second question in your last post has also already been asked,
and answered
and confirmed.