This is what I guessed, backup of Cisco IOS and/or Cisco config files. That is precisely where my expertise in TFTP originates
To backup the IOS, you will have to touch a file (and give open permissions) to the same name of the file you are saving. When you do a 'write net' on the Cisco boxes, it will ask for the name/ip of the TFTP server AND the name of the file (the Cisco IOS gives a default). That file MUST exist in the TFTP directory of the server.
So before you do a 'write net' you much touch a file with the same name as the file you are writing. For example, on the server:
Code:
cd /etc/tftp
touch cisco-ios-dec-05-v11.03a
chmod 666 cisco-ios-dec-05-v11.03a
On the router you would then 'write net' file name, cisco-ios-dec-05-v11.03a. (use your own file names). The confusion most people have is that the file must exist in the TFTP directory in order to write it from a device, like the Cisco IOS. To read the file (get), you must know the exact name of the file you are 'getting'. Same is true for Cisco configurations:
Code:
cd /etc/tftp
touch router-bigmomma-new-access-lists-dec-06
chmod 666 router-bigmomma-new-access-lists-dec-06
I forget the exact Cisco syntax, so if you need help in that area, please login to the router from an X or other GUI telnet session and use the mouse to capture the screen (Cisco console) and upload to this thread. I can help you through the 'write net' and other commands between the Cisco IOS and your UNIX TFTP platform.
Hi,
Setting up print queue, using SMIT on AIX
And I have an option saying do I wish to make this a BOOTP/TFTP server. What exactly does this do?
Thanks (3 Replies)
I have been hearing that this protocol offers faster throughput rate than FTP, is it true? If so, are there any compromise in reliability on data being sent? How do I set up a TFTP transfer instead of a FTP to download?
Thanks (3 Replies)
Hi everyone,
I am currently receiving an error on my console that reads something like:
<host> tftpd: socket (delay): Protocol not supported
I have done so much research into tftpd, i've looked everywhere to find out what this might be caused by...unfortunately i have Solaris 8, so there... (5 Replies)
RH 7.2
I am attempting to get tftp working but I'm having a problem. On the server, xinetd has libwrap options compiled in. I have a deny all policy in my hosts.deny file and the following entries in my hosts.allow file:
in.tftpd:.10.151.2.6
But...when I attempt to tftp from... (1 Reply)
ive been trying to enable a tftp service on a unix box
using the command atftpd --daemon
but when i scan the open ports using nmap it doesnt show that port 21 as up
does anyone know the reason...
ive tried /etc/init.d/atftpd start , it didnt work
if i type atftpd by it self it gives me a set... (2 Replies)
Hi
I am trying to do a network install of Solaris 10 08_07 onto a Sunfire T2000. I have configured all my network-boot-arguments on the client server (named sundb1). I have installed my image of Solaris on my install server (sun1).
But when I try to install using
# boot net -s
I get the... (0 Replies)
Hi,
I'm trying to run the tftp client on tsch shell and I get command not found, but on bash tftp ran fine, can anyone help me on how to run it on tsch?
Thanks (1 Reply)
I know that IBM's official stance is that NIM does not work on etherchannel environment, but has anyone able to get around it?
I'm working on a p5-590 LPAR system, and the NIM master and clients are all on the same frame.
Any help is appreciated. (1 Reply)
I have setup nimol on a Fedora 9 machine. Nimol is installed and correctly configured and I have a client rs6000 (43p) declared in the dhcpd.conf file. all is running correctly and tftp is installed. I am monitoring /var/log/messages when I start the 43p and see the dhcp request come in and a reply... (0 Replies)
Discussion started by: johnf
0 Replies
LEARN ABOUT FREEBSD
tftp-proxy
TFTP-PROXY(8) BSD System Manager's Manual TFTP-PROXY(8)NAME
tftp-proxy -- Internet Trivial File Transfer Protocol proxy
SYNOPSIS
tftp-proxy [-v] [-w transwait]
DESCRIPTION
tftp-proxy is a proxy for the Internet Trivial File Transfer Protocol invoked by the inetd(8) internet server. TFTP connections should be
redirected to the proxy using the pf(4) rdr command, after which the proxy connects to the server on behalf of the client.
The proxy establishes a pf(4) rdr rule using the anchor facility to rewrite packets between the client and the server. Once the rule is
established, tftp-proxy forwards the initial request from the client to the server to begin the transfer. After transwait seconds, the pf(4)
NAT state is assumed to have been established and the rdr rule is deleted and the program exits. Once the transfer between the client and
the server is completed, the NAT state will naturally expire.
Assuming the TFTP command request is from $client to $server, the proxy connected to the server using the $proxy source address, and $port is
negotiated, tftp-proxy adds the following rule to the anchor:
rdr proto udp from $server to $proxy port $port -> $client
The options are as follows:
-v Log the connection and request information to syslogd(8).
-w transwait
Number of seconds to wait for the data transmission to begin before removing the pf(4) rdr rule. The default is 2 seconds.
CONFIGURATION
To make use of the proxy, pf.conf(5) needs the following rules. The anchors are mandatory. Adjust the rules as needed for your configura-
tion.
In the NAT section:
nat on $ext_if from $int_if -> ($ext_if:0)
no nat on $ext_if to port tftp
rdr-anchor "tftp-proxy/*"
rdr on $int_if proto udp from $lan to any port tftp ->
127.0.0.1 port 6969
In the filter section, an anchor must be added to hold the pass rules:
anchor "tftp-proxy/*"
inetd(8) must be configured to spawn the proxy on the port that packets are being forwarded to by pf(4). An example inetd.conf(5) entry fol-
lows:
127.0.0.1:6969 dgram udp wait root
/usr/libexec/tftp-proxy tftp-proxy
SEE ALSO tftp(1), pf(4), pf.conf(5), ftp-proxy(8), inetd(8), syslogd(8), tftpd(8)CAVEATS
tftp-proxy chroots to /var/empty and changes to user ``proxy'' to drop privileges.
BSD November 28, 2005 BSD
12-07-2000
