Q: Strange network hang
I have experienced a kind of a strange network hang situation.
I have a Mac Mini with OS X 10.10.5. Everything worked fine for years since this morning. Suddenly I could not open an http connection to a specific device (Synology NAS) using Safari (http://a.b.c.d:5000). I could not open the connection using Safari and Firefox. Even wget http://a.b.c.d is handing. Finder with smb://a.b.c.d was also handing. At the same time it was possible to open connections from my Mac Mini to other devices and the internet. I could ping the NAS from my Mac Mini. It is also possible to open the DSM interface on http://a.b.c.d:5000/ and smb://a.b.c.d from a linux system which is in the same network. After disabling all network interfaces and rebooting the Mac Mini it works if I just enable the WLAN only. If I enable the cable connection the connection to the Sinology NAS hangs again. I have cleared the ARP and DNS cache, but it is still the same. Any help is appreciated.
Posted on Aug 8, 2016 9:02 AM