Allow to force TFTP to use a fixed UDP port
(Add a configuration option CONFIG_TFTP_PORT and optional env variable tftpport)
Patch by Jerry Van Baren, 10 Jan 2005
diff --git a/README b/README
index e3d0537..3b36e50 100644
--- a/README
+++ b/README
@@ -1487,6 +1487,22 @@
When SystemACE support is added, the "ace" device type
becomes available to the fat commands, i.e. fatls.
+- TFTP Fixed UDP Port:
+ CONFIG_TFTP_PORT
+
+ If this is defined, the environment variable tftpport
+ is used to supply the TFTP UDP source port value.
+ If tftpport isn't defined, the normal pseudo-random port
+ number generator is used.
+
+ The purpose for this is to allow a TFTP server to
+ blindly start the TFTP transfer using the pre-configured
+ target IP address and UDP port. This has the effect of
+ "punching through" the (Windows XP) firewall, allowing
+ the remainder of the TFTP transfer to proceed normally.
+ A better solution is to properly configure the firewall,
+ but sometimes that is not allowed.
+
- Show boot progress:
CONFIG_SHOW_BOOT_PROGRESS
@@ -2452,6 +2468,9 @@
Useful on scripts which control the retry operation
themselves.
+ tftpport - If this is set, the value is used for TFTP's
+ UDP source port.
+
vlan - When set to a value < 4095 the traffic over
ethernet is encapsulated/received over 802.1q
VLAN tagged frames.