I'm dealing with a pretty strange issue with my new MacBook Pro Retina (10.7.4)... when I connect to either the wired or wireless network at my office, I grab an IP address from the DHCP server and everything appears to be in working order. However, I am unable to initiate any network traffic outbound from the laptop. For example, if I try to ping another host on the LAN, I receive this output: However, I can successfully ping the MBP from other network hosts and connect via various network protocols (SMB, VNC, etc.) without issue. Performing a Wireshark packet capture, it does not appear that my outbound traffic is making it to the interface, leading me to believe something in OSX is blocking it. I'm hopeful someone out that has some thoughts as to the best approach to resolving this issue; any help would be greatly appreciated.