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Operating Systems Linux Ubuntu Public ip is not shown in ifconfig - Ubuntu 16.04 Post 303026397 by hicksd8 on Tuesday 27th of November 2018 04:45:02 AM
Old 11-27-2018
Well here in the UK, my ISP does allow me to ping my current public ip address so that my router can respond. Usually, my public ip address changes rarely; typically less than once a month. However, I can use Dynamic DNS to update every 5 minutes and therefore track my public ip should it change. I can use port forwarding to pass-through any in-bound connection specifying a particular port number to my desired machine.

This is no good for a production system because if I just happened to want to call in when my public ip has just changed, I might have to wait up to 5 minutes for it to work.

However, since the OP says that his public pool ip won't ping then it seems his ISP blocks traffic to such subscribers.
 

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RECURSIVECACHINGITERATOR(3)						 1					       RECURSIVECACHINGITERATOR(3)

The RecursiveCachingIterator class

INTRODUCTION
... CLASS SYNOPSIS
RecursiveCachingIterator RecursiveCachingIteratorextends CachingIteratorCountableArrayAccessOuterIteratorRecursiveIterator Methods o public RecursiveCachingIterator::__construct (Iterator $iterator, [string $flags = self::CALL_TOSTRING]) o public RecursiveCachingIterator RecursiveCachingIterator::getChildren (void ) o public bool RecursiveCachingIterator::hasChildren (void ) Inherits o public CachingIterator::__construct (Iterator $iterator, [string $flags = self::CALL_TOSTRING]) o public int CachingIterator::count (void ) o public void CachingIterator::current (void ) o public array CachingIterator::getCache (void ) o public void CachingIterator::getFlags (void ) o public Iterator CachingIterator::getInnerIterator (void ) o public void CachingIterator::hasNext (void ) o public scalar CachingIterator::key (void ) o public void CachingIterator::next (void ) o public void CachingIterator::offsetExists (string $index) o public void CachingIterator::offsetGet (string $index) o public void CachingIterator::offsetSet (string $index, string $newval) o public void CachingIterator::offsetUnset (string $index) o public void CachingIterator::rewind (void ) o public void CachingIterator::setFlags (bitmask $flags) o public void CachingIterator::__toString (void ) o public void CachingIterator::valid (void ) PHP Documentation Group RECURSIVECACHINGITERATOR(3)
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