You may already be aware, but TFTP - like FTP - is not a NAT friendly
protocol and requires a helper or ALG to inspect the control channel in
order to open up and translate the connections used by the data channel
(which use unrelated high numbered UDP ports). If TFTP is not working
when NAT
Have any of you seen the Comcast XB6 modem blocking TFTP and some SIP requests?
We put the modem into bridge mode and TFTP requests are successful. Reset it,
set security to the lowest setting, disable the firewall... no TFTP requests
pass.
Modem\Router - cable - laptop.
Of course we
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