Fedora 12 freezes when I scp

[Kevin Kempter]

On Wednesday 03 February 2010 21:29:11 Paolo Galtieri wrote:
> On 02/03/2010 09:16 PM, Ed Greshko wrote:
> > Kevin Kempter wrote:
> >>> Hi all ;
> >>>
> >>> I'm running a fully updated Fedora 12 laptop
> >>>
> >>> when I scp files to/from my laptop the system always freezes near the
> >>> end of the scp with the latest kernel.
> >>>
> >>> Anyone know how to fix this?
> >>
> >> I just verified that the previous kernel (2.6.31.9-174.fc12.x86_64)
> >> works, but the latest kernel (2.6.31.12-174.2.3.fc12.x86_64) has the
> >> above issue
> >
> > FWIW, this problem does not occur on my 32-bit system running
> > 2.6.31.12-174.2.3.fc12.i686.PAE.   I only tested using a single file of
> > 14k.  Is it all files....long/short?  Using or not using wild cards?
> 
> I just tried to scp a directory between 2 F12 systems (both 64 bit) and
> it worked.  The directory contained small and large files.  One was a
> laptop one was a desktop and the network connection was wireless.
> 
> paolo
> 

After further digging I found this:

If I run scp with a -4 (Forces scp to use IPv4 addresses only) then it works.
Any Ideas why this would be an issue? Would this be a network config on my 
laptop? or on the remote server I'm scp'ing from (it's running the latest 
CentOS)? Or something else?