CentOS 5 :: Security On Tftp Server (vsftpd) - Permission Denied
Jun 13, 2009
I am trying to wade through the semanage jungle to get permissions for a tftp client. I followed the HowTos [URL] but I get the following at the client:
tftp> status
Connected to 192.168.1.101.
Mode: netascii Verbose: off Tracing: off
Rexmt-interval: 5 seconds, Max-timeout: 25 seconds
tftp> get hello.o4
tftp: hello.o4: Permission denied
I finally figured out that the firewall directives shown at the end of the HowTo refer to semanage although the options are stated incorrectly according to the man page for semanage. I did insure that the file hello.o4 in /tftpboot has read permission for everybody.
I'm trying to setup a network boot server and I'm having an issue with tftp. In the /etc/xinetd.d/tftp file, I added the "-v" (verbose) option to the server arg line so that i could figure out what was happening. When i looked at the /var/log/messages log file, it let me know that permission was denied to /tftpboot/nbi_img.
So, in short, my problem is that tftp isn't working because it doesn't have permission to /tftpboot/nbi_img. I can't figure out why. I stumbled upon a site where the user figured out a temporary fix to this issue and what he did was disabled the xinetd service and typed the following command:/usr/sbin/in.tftpd -l -v -v -s /tftpboot/nbi_imgWhen I do this as well, it works! but only until I restart and then I have to do that again. Is there a way to be able to fix that for good?
I've got that vsftpd running on a ubuntu 9.10 machine. Although I cannot upload any file, I always get a "550: Permission denied"-error.
Code: # Example config file /etc/vsftpd/vsftpd.conf # # The default compiled in settings are fairly paranoid. This sample file # loosens things up a bit, to make the ftp daemon more usable. # Please see vsftpd.conf.5 for all compiled in defaults. #
I am trying to put a file from one linux machine to my other linux machine. There is absolutely no problem in downloading the file i.e. performing the "get" operation but when I try to upload or "put file" from my host1 to host2 it throws error "Error 0 Permission denied". I am able to put files from host2 to host1 without any problem but not from host1 to host. Infact if I try to tftp even localhost on host2 it throws the same error. Here is my
/etc/xinetd.d/tftp file for host2 service tftp { socket_type = dgram protocol = udp wait = yes user = root server = /usr/sbin/in.tftpd server_args = -c -s /tftpboot #disable = yes disable = no per_source = 11 cps = 100 2 flags = IPv4 } And permissions on /tftpboot are 777 [root@LinuxServer /]# ls -ld /tftpboot/ drwxrwxrwx 2 root root 4096 Jan 6 05:21 /tftpboot/ [root@LinuxServer /]# ls -l /tftpboot/ total 16 -rwxrwxrwx 1 root root 11 Jan 6 06:16 new_test -rwxrwxrwx 1 root root 12 Jan 5 06:02 test2
And the command which I am using is : [root@LinuxServer /]# tftp localhost -c put new_test Error code 0: Permission denied And ya here is /etc/sysconfig/selinux file is as under : # This file controls the state of SELinux on the system. # SELINUX= can take one of these three values: # enforcing - SELinux security policy is enforced. # permissive - SELinux prints warnings instead of enforcing. # disabled - SELinux is fully disabled. SELINUX=permissive # SELINUXTYPE= type of policy in use. Possible values are: # targeted - Only targeted network daemons are protected. # strict - Full SELinux protection. SELINUXTYPE=targeted
I've only recently encountered this problem with vsftpd when I was creating new ftp accounts. I keep on getting:
550 Access Denied.
on every action I try to do on ftp, no matter what. I've been trying to solve this myself however my attempts have been futile.
The permissions, and ownership have been checked and rechecked tens of times now, so thats not the issue. I've reinstalled the OS of my server twice now, and the problem is still persisting. Heres my config file, this isnt for anon by the way.
Code: # Example config file /etc/vsftpd/vsftpd.conf # # The default compiled in settings are fairly paranoid. This sample file # loosens things up a bit, to make the ftp daemon more usable. # Please see vsftpd.conf.5 for all compiled in defaults. #
And I added umask 022 to the user login script problem I have: I login with user and password that exists as a local user on my suse machine. I can read and download from my homedirectory, but I cannot upload with filezilla. Then I get the error: 550 permission denied critical file transfer error
nfs mounted directory which is mounted rw. I and everyone else are members of a common group. We all have write permissions in the tree: All files and directories in the tree are in the common group. All directories are set to 775 and all files are set to 664 or 775, as appropriate.If a file is owned by someone else, even though the file and the directory are group writable, I get permission denied when I try to chmod the file.
Here's the command synopsis: 997 > ls -l portparms.txt -rwxrw-r--. 1 bdaugher fc 4091 Sep 5 2003 portparms.txt
I was able to install and start tftp.I can tftp localhost and get a file, even from a non-administrator login.I can connect from a remote host, but the *get* times out.I suspect there is a security issue. Can you tell me how to lower the security on tftp so that a remote host can do gets?
I am trying to install COMSOL 4a in Ubuntu 10.04 and when I try to run ./setup and I am already connected as root the command line gives me a permission denied error.
I have, say, 10 machines, connected via NFS and NIS. There's a server which exports the /home using NFS, and exports the user names using NIS. All machines are working fine. I am able to ssh to the machines remotely and get my work done.Recently though, one of the machines (say M, for easy reference) would not allow any other machine on the NFS network [or outside the NFS network] to ssh into it. Every time an ssh attempt is made, 3 IP addresses [including the machine from which an ssh attempt was being made] are added to the /etc/hosts.deny file on M, and the error message on the other machine shows 'permission denied' after the password is entered. I tried using various options that ssh provides, but I cannot figure it out. I also tried uninstalling and reinstalling openssh-client and openssh-server on M, but it didn't change anything.
Another point to note is this: another user made use of M before, for a while, by disabling ssh passwords - so he could access M without having to enter his ssh password. That individual can still log in to M. All others who require to enter a password cannot ssh into M.
Is it possible to change the general permission denied error. I have some rather young users on this system that think they can "hack the gibson" and I would love to change the general error message to something a little more rude/funnyex:# cd restricted area -sh: cd: restricted area: Permission deniedI am curious if its possible to change the error message in general?ex:# cd restricted area-sh: cd: restricted area: (funny/rude message goes here)Quick info:This is a Gentoo 2008.0 system, I would also love to do this on my slacware and OpenBSD boxes as well just for kicks.
I did create an rsa certificate with ssh-keygen using my root account on a client: ssh-keygen -t rsa -b 2048 no passphrase I did copy the rsa pub_key from my client to the server scp id_rsa sampleuser@sampleserver:/home/sampleuser/.ssh/authorized_keys
I did change the ownership to the "sampleuser" of the pub key file on the server: I trayd to connect: ssh sampleuser@sapleserver
I get that: permission denied (public key)... I know I do smth wrong but I don't know what.
This is weird, today I updated my system and while trying to visudo from single user mode got
"cannot read /etc/shadow: Permission denied"
which kept me from doing anything until I switched to file permissions of 400 on shadow, then back. Is this being experienced by anyone else or just me? /etc/security/limits.conf doesn't seem like it wants to change in enforcing mode either and I can't find any alerts to provide clues on the situation.
I have recently bought a new laptop, installed my first linux OS on it (Ubuntu 9.10) and an external hard drive with 500GB on it for backup. For the first few days my external hard drive was working fine, but then eventually it wouldn't let me copy/move/delete stuff to and from it. So I kept trying to change the permissions but it wouldn't let me.
I figured this would be a very very common problem, so I looked up some forums to try out the methods but they didn't work. So I thought I would ask you guys for help because I am pleased with the support. I wouldn't think this would be a hard problem to solve.
I have an external hard drive that has all of my Apple Powerbook G4 files on it. I plugged in my "Journal Extended" external hard drive into my new HP laptop with Ubuntu 10.10 on it.
All of my files are on the hard drive still, however lots of them have a little X on the folders and when I try to open them it tells me I don't have permission? How can I force the permission for everything on my external? It's my own files and I can't even access them lol.
I have a CGI script that when called runs another script as a different user. Yet when the script does run I keep getting a permission denied in the logs and the script fails
In the sudoers file- Defaults env_reset www-data ALL=(charly) NOPASSWD=ALL
For the full question- When looking at /etc/sudoers there is the defaults line that you can add things to. When doing a sudo -L so that I can see what I can put on that defaults line. Can an individual user have specific defaults? Ones that don't effect the rest of the people in /etc/sudoers?
Whenever i copy ELF or BIN files from the filesystem of linux i must get permission denied. For this case i have gone through the linux security module but didn't get much help regarding the permission denied only in case of copy of ELF and BIN files from filesystem. how can i proceed in this. WORK DONE:
1. Downloaded linux-2.6.25.14
WORK NEEDS TO BE DONE:
1. compile the kernel with some modifications in linux security module to get the desired results but this time i am unaware of that.
I'm trying to run a backup using CPIO to an LTO2 tape in an HP Ultrium 460 drive using the following:find / -path /proc -prune -o -print | cpio -o -H crc --block-size=128 > /dev/st0Each time I get the error:-bash: /dev/st0: Permission deniedThis is regardless of whether I sudo the two sides of the command or not. I have used dd if=/dev/st0 of=/tmp/test.file ibs=128k count=1 to verify the blocksize (and since I was a little confused about block-size in cpio I also tried --block-size=256)
i have a big question about nfsv4, 2 mahine , 1 client 1 serverclient mount -t nfs4 nfs:/ /mnt/nfscd /mnt/nfs/1touch: cannot touch `123': Permission deniedmount -lnfs:/ on /mnt/nfs type nfs4rw,addr=192.168.1.5)this is my configclient & servervi /etc/hosts192.168.1.5 nfs nfs.test.com192.168.1.6 node1 node1.test.com
When I try to pxe boot a Sun X4100 (which actually has a RHEL OS on it right now) I get the message TFTP open timeout. All traffic is allowed for port 69 udp in both directions. I do get a dhcp address. I see that both on the server and the client it gets an IP. After that I get this message in the logs:
I have my DNS configure in 2 zones. 1 internal, and the other external. DNS is chrooted under /var/named/chroot amd has been operating without any problems for well over 2 years now. I have recently run cross the problem shown in the subject line. When I try to freeze the internal dehnert.com zone with the following command...rndc freeze dehnert.com IN internal
I get the error...
I have been running the command as root, and with iptables turned off, so there is no firewall to restricting access. (the system sits behind a firewall) I have been searching the forums all over, but I havent run across what might be causing me to have root denied access. If anyone has seen any problem like this, please point me in the right direction so I can iron this out.
I want to install Codendi softwr to my Centos 5.3.But can not execute the installation script gives an error permission denied./etc/fstab file does not contain a path that holds my CDROM drive.
I have 3rd party software that I need to install. It is called VNMRJ. It is packed as one .tar. I extracted the .tar to the desktop (under root) and want to start the installation. However, during the installation process, all .tar files included the the package (sub directories) can't be extracted by the installation routine. For every .tar I get the error
tar: /root/Desktop/vnmrj21b_inova_01106/code/common/com.tar: Cannot open: Permission denied Installation of VNMR failed tar: Error is not recoverable: exiting now DONE: 112 KB
I have a user (let's call him John) who is not able to list contents of several 777 directories even though it appears he has permission to.
Case in point, as root:
Code:
Code:
If I use ls -a or strictly ls as john, I can list the contents of the nss directory:
Code:
That says to me that I have an issue listing permissions. Fine, I don't really need john to be able to list permissions. I want him to have rwx access to /media/nss/ENG which as you can see from my listing as root shouldn't be a problem since the perms on that dir are 777.
I am able to CD into the ENG directory or any other directory or subdirectory in /media/nss that has equivalent 777 perms, but once in the directories I can't list the contents:
Code:
I can get anywhere and do anything I want under the media/nss folder as john, except listing files. I even tried using an ACL i.e.
I am trying to give an SSH user on my server permission to compile C exploit with gcc, and I have had no luck. Every time i try to run gcc i get: "sh: /usr/bin/gcc: Permission denied. Has anyone else had this problem with this ?
I have a cgi script that tries to get the IP address of a domain. the Domain is defined in Bind, yet it can not resolve it. I put the domain in the host file and it then gives a Error: unable to create socket - Permission denied
I figure I have to do some code changes to the script but here I would like an explaination as to the error I am getting.
I have tried to mount Sda on my laptop HP dv6 and I have got this problem [root@cpe-74-71-125-175 ~]# /dev/sda1 /mymount/win ntfs-3g rw,umask=0000,defaults 0 0 bash: /dev/sda1: Permission denied
