SVN Clients on Windows Server 2008 R2 freeze while attempting to run update/checkout

SVN Clients on Windows Server 2008 R2 freeze while attempting to run
update/checkout

Here's my setup: I'm running Jenkins as a CI build server on Windows
Server 2008 R2 VM. My SVN server is v.1.6.[something] on a Linux server
(I'm pretty sure it's CentOS, but I don't know the version). Jenkins' SVN
plugin is SVN 1.7. I've also tried using TortoiseSVN and SlikSVN (all 1.7)
with the same results.
Whenever I try to run an update on a repo, SVN tries to pull the files,
but as soon as it tries to get a file from an external, it hangs
indefinitely, and I have to force quit the svn client. I've tried
completely disabling the firewall, but the same problem occurs.
I did a wireshark capture (which I don't think I should upload since this
is a work server), and noticed that every request sent to the SVN server
had the error: Header checksum: 0x0000 [incorrect, should be 0x74b6 (may
be caused by "IP checksum offload"?)]
Any thoughts? Thanks!