> Plenty of mobile networks will timeout inactive TCP connections in less than 30 seconds. Good grief - that is awful, but sadly believable. Do you happen to

> Plenty of mobile networks will timeout inactive TCP connections in less than 30 seconds. Good grief - that is awful, but sadly believable. Do you happen to know who does that? A couple years ago I tested AT&T's 3G and found that the TCP timeout was 30 minutes, versus 30 seconds for UDP. I'd love to know numbers for other carriers. Edit: Found an interesting paper from 2011 that tested 73 cellular carriers worldwide and found only 4 with TCP timeouts less than 5 minutes. The majority had timeouts greater than 30 minutes, and 21 had a timeout in the 5-30 minute range. Some of my faith in humanity has been restored. http://www.cs.ucr.edu/~zhiyunq/pub/sigcomm11_netpiculet.pdf http://www.cs.ucr.edu/~zhiyunq/pub/sigcomm11_netpiculet.pdf (see page 8, table 5) Edit: A paper from 2012 which measured Verizon and Sprint at 30 minutes, and AT&T at 3 minutes (my tests are more recent, so perhaps AT&T wised up?) http://www.cs.umass.edu/~yungchih/publication/12_mtcp_4g_tech_report.pdf http://www.cs.umass.edu/~yungchih/publication/12_mtcp_4g_tec... (see page 11, table VI)