How do I solve “collect: I/O error on connection” or “reply: read error from host.name” errors?
If you are just getting occasional such messages, they’re probably due to a temporary network problem, or the remote host crashing or otherwise abruptly terminating the connection. If you are getting a lot of these from a single host, there is probably some incompatibility between 8.x and that host (see Q3.12 and Q3.20). If you get a lot of them in general, you may have network problems that are causing connections to get reset. Note that this problem is sometimes caused by incompatible values of the MTU (Maximum Transmission Unit) size on a SLIP or PPP connection. Be sure that your MTU size is configured to be the same value as what your ISP has configured for your connection. If you are still having problems, then have your ISP configure your MTU size for 1500 (the maximum value), and you configure your MTU size similarly. Another possibility is that you have a router/firewall filtering out all incoming ICMP messages, while your OS is doing “Path MTU discovery” (e.g.
