Re: SMTP/HTTP/Tor Connections Timing Out
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On Sun, Jun 14, 2015 at 12:51:14PM +1000, Riley Baird wrote:
> Hi,
>
> Many of my connections are timing out. For example, I can't use SMTP to
> send a message if it's over ~1500 bytes [...]
This sounds suspiciously as if your box were using an MTU[1] which is too
big for the path (1500 is about the Ethernet MTU. Perhaps along the path
there is a link with a smaller MTU (typically something encapsulating
the packets, which needs some room for headers, so the available payload
per packet schrinks accordingly).
In the Good Old Days, your box would get an ICMP reply from the router
in-between by this router, telling that the MTU is too big, but these
days, over-eager firewalls tend to filter out these things.
Try to reduce the MTU of your interface, with something along the lines
of
sudo ifconfig eth0 mtu 1400
(of course, you'd have to replace eth0 by the real name of your interface.
Just come back here if you don't know what I'm babbling about :-)
If that works, we can talk about how to make this change more permanent.
Rgards
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[1] MTU = "Maximum transmission unit", cf.
https://en.wikipedia.org/wiki/Maximum_transmission_unit
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