I'm running Ubuntu 9.10, and am trying to get proftpd to listen on a port other than 22. I've modified the proftpd.conf file, as well as adding the desired port to my /etc/services file, yet if I try anything other than port 22, the connection is refused.
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When I use the following command:
ssh user@ssh_server -L 5500:localhost:5500 -p 22
everything works fine. I can log in, and local port forwarding is done. Otherwise when I use the command:
ssh user@ssh_server -R 5500:localhost:5500 -p 22
I get an error "remote port forwarding failed for listen port 5500". However when I try remote port forwarding in WinXP by use of putty there is no problem...
I tried to make "ssh tunneling", but failed and got this message.
Quote:
Administrator@windstory-PC /
$ ssh -R 7869:localhost:7869 windowsstudy@192.168.0.4
windowsstudy@192.168.0.4's password:
Warning: remote port forwarding failed for listen port 7869 Last login: Wed Jul 21 01:56:04 2010 from 192.168.0.2 -bash-3.2$
1. system environment
192.168.0.2 - windows 7 + copssh
192.168.0.4 - centos 5.4 x86 + openssh
2. Guide for setting "ssh tunneling"
[URL]
3. Added this to sshd.conf
Quote:
AllowTcpForwarding yes
4. "netstat -na|grep 7869" at 192.168.0.4
Quote:
[root:maestro:~]# netstat -na|grep 7869
tcp 0 0 0.0.0.0:7869 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:7869 127.0.0.1:53539 ESTABLISHED
[code]....
5. result of "ssh -vvv -R 7869:localhost:7869 windowsstudy@192.168.0.4"
Quote:
debug3: authmethod_lookup password
debug3: remaining preferred: ,password
debug3: authmethod_is_enabled password
[code]....
6. I added 7869 for telnet service as follow;
Quote:
mytelnet 7869/tcp # My Telnet server
I make an application on GNU/Linux which listening on a MULTICAST stream, so I open my unconnected socket, bind it on a MULTICAST address and a port, join the multicast group with the "setsockopt (IP_ADD_MEMBERSHIP)", then I receive datagram on my socket.
Now I've two different instances of the same application that run with their own MULTICAST address and port. And what I found strange is that, after a misconfiguration, I switch the ports, for example:
Emitting on 225.0.0.1/23451 and 225.0.0.2/23452
Receiving on 225.0.0.1/23452 and 225.0.0.2/23451
And my receiving part doesn't care about the MULTICAST address, it looks like the socket is listening on the port number only! I mean that the receiver [225.0.0.1/23452] take its datagrams from emitter [225.0.0.2/23452] and vice-versa!
It appears that X Windows under Ubuntu (or Gnome?) is started to listen to a Unix named socket, instead of a TCP port number, for client connections. That's what SSH is forwarding when it does X forwarding. I need to start X applications on a remote machine, and then close the SSH connection. So I need to make the connections directly. This is within a LAN on private IPs, so security is not an issue. I searched on help.ubuntu, but there appears to be no particular document that covers this. Anyone know where this is configured to enable it to listen on a TCP port like the usual 6000?
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View 4 Replies View RelatedI use Ubuntu 10.10 and setup Proftpd apps which I would like to use to access to my files from outside of my SOHO LAN network. This is work on LAN very well but from outside I get some error msg. However I establish connection with my Ubuntu FTP Server machine but I can't get list of files and folders on server.
I get this error msg:
227 Entering Passive Mode 89,216,116,8 243,96 --> i know what this no means: my Stat IP and the port
500 Illegal Port Command
Get Directory
FTP Port Command failed
Some Additional Information:
On the edge of SOHO LAN i use Cisco router for access to the Internet.
NAT is configured, PAT (NAT overload) is configured also.
I forward ports which I needed for FTP: 21 and 20, and passive ports 60000 - 60001.
When I use Windows OS and BUlletProof FTP server (port 21 or some custom port i.e. 65021) I only forward that port (21 or custom port i.e. 65021) and everything works great.
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Code:
Starting Nmap 5.00 ( http://nmap.org ) at 2009-08-20 11:19 BST
NSE: Loaded 0 scripts for scanning.
Initiating SYN Stealth Scan at 11:19
[code]....
I've killed apache via /etc/init.d/apache2 stop, but something is still listening on port 80:
Code:
root@www:/etc/apache2/sites-enabled# netstat -an | grep LISTEN | grep 80
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:8022 0.0.0.0:* LISTEN
unix 2 [ ACC ] STREAM LISTENING 5806 /var/run/mysqld/mysqld.sock
How do I find out that program this is?, or how to I stop it listening?
I tried searching and tried different things and have failed miserably. What I am trying to accomplish is have postfix listen on port 587. I have read that I should do this using Linux Firewall rules as to not mess with postfix config. Here's what I have in my ip6tables.
Code:
iptables -t nat -A PREROUTING -p tcp --dport 587 -j REDIRECT --to-ports 25 However, when I restart ip6tables I get unknown arg --to-ports
How can I set my server to listen at a different port for http access. I would like to use port 8080 (to circumnavigate isp blocks). Also can I do the same thing for sftp connections?
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[ 3402.591674] ide-cd driver 5.00
[ 3402.622010] ide-gd driver 1.18
[ 3402.691580] st: Version 20081215, fixed bufsize 32768, s/g segs 256
[ 3404.308048] end_request: I/O error, dev fd0, sector 0
Some Hardware Info:
[Code]...
I want to do a simple port redirect, i.e. whatever comes trough whatever interface on port AAAA will get redirected to port BBBBI thought that iptables -t nat -I PREROUTING --source 0/0 --destination 0/0 -p tcp --dport AAAA -j REDIRECT --to-ports BBBBhowever it doesn't work, e.g. nc -v -w2 -z localhost AAAA gives:
nc: connect to localhost port AAAA (tcp) failed: Connection refused
while
nc -v -w2 -z localhost BBBB
[code]....
I have a mail server i need it to send message via port 587 not port 25, i make some changes to my postfix server which i use and it is already successed making a telnet to 587 port like it :
[Code]....
I have installed ProFTPD in Ubuntu 10.04 in a Cloud Server (console only) but I am not being able to set users and access via FileZilla.
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I'm running Ubuntu 10.4 Lucid Lynx and I am setting up gadmin-Proftpd and when I try and activate it. I get the following message and am really unsure where to go from here:
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I couldn't get GADMIN-PROFTPD to activate so I activated it using sudo /etc/init.d/proftpd start Now when I have proftpd started from the terminal command line and go to [URL] in firefox I get a white browser window but no directory listings without any promtp for a username or password (192.168.1.100 being my internal LAN server IP address) Can you tell me what I am doing wrong with the below config?
[Code]......
I'm having problems with the ftp-server ProFTPd,If I transfer files from a Linux host to a Windows client, it says that my transfered files are damaged, so I'm unable to open them..I've searched this forum and several people say I have to set the default transfer mode to 'binary' mode.I did that, but it didn't work at all for me... so despite the binary transfer mode my files are still damaged when I transfer them.when I do it through SSH, it works fine, so the problem is the FTP-server...
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