From: Brian Dennis (bdennis@internetworkexpert.com)
Date: Wed Nov 30 2005 - 19:15:02 GMT-3
Here is what the RFC says:
<Quote>
As an example, the following shows the steps used to establish a
connection to write a file. Note that WRQ, ACK, and DATA are the
names of the write request, acknowledgment, and data types of packets
respectively. The appendix contains a similar example for reading a
file.
1. Host A sends a "WRQ" to host B with source= A's TID*,
destination= 69.
2. Host B sends a "ACK" (with block number= 0) to host A with
source= B's TID, destination= A's TID*.
</Quote>
* - The transfer identifiers (TID's) used by TFTP are passed to the
Datagram layer to be used as ports; therefore they must be between 0 and
65,535.
http://www.internetworkexpert.com/rfc/rfc1350.txt
HTH,
Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
bdennis@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987
Direct: 775-745-6404 (Outside the US and Canada)
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Grabler, Ross (IT)
Sent: Wednesday, November 30, 2005 1:48 PM
To: Mitchell, TJ; Melwani, Manoj J; tj.mitchell; ccie lab
Subject: RE: FTP Question
From what I remember it was the higher, I remember creating a list gt
than 32xxx, but I could be wrong.
-----Original Message-----
From: Mitchell, TJ [mailto:tmitchell@allianttech.com]
Sent: Wednesday, November 30, 2005 4:37 PM
To: Grabler, Ross (IT); Melwani, Manoj J; tj.mitchell; ccie lab
Subject: RE: FTP Question
Now we are getting somewhere.
Between what and what? Higher ports or lower ports?
Thanks
T.J. Mitchell
-----Original Message-----
From: Grabler, Ross (IT) [mailto:Ross.Grabler@morganstanley.com]
Sent: Wednesday, November 30, 2005 4:33 PM
To: Mitchell, TJ; Melwani, Manoj J; tj.mitchell; ccie lab
Subject: RE: FTP Question
At first it uses 69 and then random ports, it's a weird protocol
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Mitchell, TJ
Sent: Wednesday, November 30, 2005 4:27 PM
To: Melwani, Manoj J; tj.mitchell; ccie lab
Subject: RE: FTP Question
Are you sure??
Thanks
T.J. Mitchell
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Melwani, Manoj J
Sent: Wednesday, November 30, 2005 4:23 PM
To: tj.mitchell; ccie lab
Subject: RE: FTP Question
TFTP uses UDP port 69.. Correct me if i'm wrong guys...
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
tj.mitchell
Sent: Wednesday, November 30, 2005 4:17 PM
To: ccie lab
Subject: FTP Question
Guys -
This is an interesting question. I thought of it after running into the
issue on a production network that I was troubleshooting, I know the
answer now, but didn't then I thought I knew the answer and was partly
correct.
What port number does TFTP use?
Just thinking if they put this on the lab for a security question what
the answer should be.
Thanks,
T.J.
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