Inetd listening but no connection (ftp/Telnet)

wowy · 03-18-2015, 08:44 AM

Hello,

I try to use a ftp daemon and a Telnet daemon with inetd and the BusyBox v1.19.0 on a linux 2.6.24.

When running inetd and then checking what is listening with "netstat -an |grep LISTEN" i have :

Code:

netstat: /proc/net/tcp6: No such file or directory
netstat: /proc/net/udp6: No such file or directory
netstat: /proc/net/raw6: No such file or directory
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN

tcp        0      0 0.0.0.0:21              0.0.0.0:*               LISTEN

tcp        0      0 0.0.0.0:23              0.0.0.0:*               LISTEN

ftp port 21 and Telnet port 23 seems to be listening.

My inetd.conf file is :

Code:

#<service_name>    <sock_type>    <proto>    <flags> <user>     <server_path>     <args> 

21 stream tcp nowait root ftpd ftpd /etc
telnet            stream        tcp        nowait    root    /usr/sbin/telnetd

I have no rule in my hosts.deny so nothing should be stopped and i have no iptables firewall in place too.

When typing "ftp://ipofthetarget" in a web browser i have a error :

Code:

504 Gateway Timeout
Gateway timeout expired while waiting for server response.

And when trying to Telnet from another computer or "Telnet localhost" from the board i have :

Code:

# telnet 10.2.29.201
Trying 10.2.29.201...
connected to 10.2.29.201.
Escape character is '^]'

Connection closed by foreign host.

This would mean that the connection for Telnet exist but why is it closing ?

Thank you for your future answers !

UPDATE 1 :
If i try to run telnetd like this :
/usb/sbin/telnet -l /bin/sh
i can connect anonymously from another computer, not perfect because i would like a user/password but still of use.
The problem with the ftp daemon still exist.

UPDATE 2 :
Trying from Windows cmd or linux terminal : ftp ipofthetarget seems to work
Not perfect because i would like a user/password too but still of use.

I am still open for suggestion for the user/password thing. I am not deleting the thread in case someone interested about this exist.

JJJCR · 03-19-2015, 05:26 AM

did some Googling Busybox is design for anonymous setup according to this link below:

http://comments.gmane.org/gmane.linux.busybox/41042

Text below from link above.

Quote:

Busybox ftpd is an anonymous ftpd, without access restrictions. I
suggest putting the files to be served in a separate directory, using a
chroot and running ftpd with a low privileged user (not as root), so ftp
access goes not to system related files.

wowy · 03-19-2015, 05:35 AM

Quote:

Originally Posted by JJJCR

did some Googling Busybox is design for anonymous setup according to this link below:

http://comments.gmane.org/gmane.linux.busybox/41042

Text below from link above.

Yes, i saw this too.

I want to find a ftp daemon with non anonymous possibility for armv5 but it seems to be a real battle.
When trying to cross compile vsftpd or bftpd i get a "applet not found" error when running them on my board.
I saw that the archlinuxarm project had a bftdp package for armv5 soemwhere in there package list but i don't know how to download it so i asked the question on their forum.