SSH Port Forwarding - sharing the same port


 
Thread Tools Search this Thread
Special Forums IP Networking SSH Port Forwarding - sharing the same port
# 1  
Old 04-30-2010
SSH Port Forwarding - sharing the same port

Hi Linux/Unix Guru,

I am setting Linux Hopping Station to another different servers.

My current config to connect to another servers is using different port to connect.

e.g

ssh -D 1080 -p 22 username@server1.com

ssh -D 1081 -p 22 username@server2.com

Now what I would like to have to share the same port from the same box.

ssh -D 1080 -p 22 username@server1.com

ssh -D 1080 -p 22 username@server2.com

But when I share it, I will get below error:

bind: Address already in use
channel_setup_fwd_listener: cannot listen to port: 1080
Could not request local forwarding.

How could I configure the same port? help. thank you.
# 2  
Old 04-30-2010
Smilie

I don't understand. These servers are not public facing? You could shell in directly in that case.

There is no need to specify different ports for virtual hosts on the same server. As long as there is a user@domain with shell privileges, they can log in.

Now I do use my public facing server to act as a shell intermediary... I shell in to the gateway server, then shell in to the other servers behind it on the local network. Is that what you are doing?
# 3  
Old 04-30-2010
I think yes.

Because the main purpose of that hopping station is established connection (tunneling) to different apps in different servers.

So I will send configuration for my users to use port 1081 and 1082 in their Citrix Firewall settings, 127.0.0.1 1082 or 1081

Then before that they have to login to my server via Putty.

Now all I want is to share the same port in my linux box. Is it possible?
# 4  
Old 05-03-2010
No... As far as I know, only one process may have a port open.
This User Gave Thanks to macwunder For This Post:
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Red Hat

iptables port forwarding

Hello All, I would like to ask you very kindly with /etc/sysconfig/iptables file I have to setup port forwarding on RHEL6 router. Users from public network must be able to ssh to servers in private network behind RHEL6 router. Problem is that servers in private network must be isolated. My... (2 Replies)
Discussion started by: oidipus
2 Replies

2. UNIX for Advanced & Expert Users

Help on port forwarding please..

Hi experts, We have windows machine ( A ) in one network & 2 Linux Servers ( B & C ) in another network. There is a firewall between these 2 networks and SSH (TCP/22) & HTTPS (TCP/443) are allowed from A to B only (but not to C). There is no personal firewall / iptables running on any machine.... (1 Reply)
Discussion started by: magnus29
1 Replies

3. IP Networking

Ssh port forwarding through a pseudo terminal

Here's a situation: I do all my work on a Mac. I have mysql installed on my mac. 1. There's a certain linux server 'server01' that provides access to another linux server 'server02' via a pseudo terminal So, to ssh into 'server02', I do this from my mac: ssh -t server01... (1 Reply)
Discussion started by: imperialguy
1 Replies

4. Solaris

How to find port number wwn of particular port on dual port HBA,?

please find the below o/p for your reference bash-3.00# fcinfo hba-port HBA Port WWN: 21000024ff295a34 OS Device Name: /dev/cfg/c2 Manufacturer: QLogic Corp. Model: 375-3356-02 Firmware Version: 05.03.02 FCode/BIOS Version: BIOS: 2.02; fcode: 2.01;... (3 Replies)
Discussion started by: sb200
3 Replies

5. IP Networking

Port forwarding issue

hi guys i have a simple question ! i have two ips . a valid and internal(172.16.11.2) i want to use port forwarding to forward any request to valid IP port 8001 to internal ip port 80 . i use this rule : sysctl -w net.ipv4.ip_forward=1 iptables -t nat -A PREROUTING -p tcp... (1 Reply)
Discussion started by: mhs
1 Replies

6. IP Networking

Ftp over SSH port forwarding

Hi, I'm trying to connect ftp over ssh port forwarding to a sever(UnixC) behind FireWall(F/W). here's my env and question. UnixA(SSH Client) ----F/W ---- UnixB(SSH Svr) ---- UnixC (FTP, 21) UnixA wants to connect ftp service of UnixC via SSH port forwarding on UnixB. Unix A,... (3 Replies)
Discussion started by: hanyunq
3 Replies

7. IP Networking

Totally stucked in ssh port forwarding

Hello my friends , i am totally stuck in ssh port forwarding topic i had learn iptables and other networking topic without any problem but ssh port forwarding is headache 1. local port = what is this ? is this incoming traffic or outgoing traffic 2. remote port = same as above 3. dynamic... (2 Replies)
Discussion started by: rink
2 Replies

8. UNIX for Dummies Questions & Answers

SSH port forwarding/tunneling

So this seems like something that should be simple...but I can't quite seem to get it up and running. I have a machine, .107 with a GUI on port 8443. The problem is that I can't connect directly to .107 from my laptop. Now I have another machine, .69 that can connect to .107. So shouldn't I be able... (4 Replies)
Discussion started by: DeCoTwc
4 Replies

9. UNIX for Advanced & Expert Users

Port forwarding

Hi I want to set up port forwarding from one network to another network. I already have this configured on the Linux box using iptables. iptables -t nat -A PREROUTING -p tcp -i eth1 --dport 1521 -j DNAT --to 10.218.146.230 iptables -A FORWARD -p tcp -i eth1 -d 10.218.146.230 -j ACCEPT ... (2 Replies)
Discussion started by: slash_blog
2 Replies

10. UNIX for Advanced & Expert Users

port forwarding

Hi, I have to install an application that has a built in tftp server. Tftp comes in on port 69. As i am not installing this application as a root user i am running into trouble because only the root user can listen to ports < 1024. So changing the port i listen to to one greater than 1023 isn't... (1 Reply)
Discussion started by: imloaded24_7
1 Replies
Login or Register to Ask a Question