1
vote
1answer
33 views

Server unexpectedly closed

So I know that similar veins to this topic have been posted, but mine specifically deals with the fact that my SSH login through Putty worked from my desktop and my laptop. However, after carrying ...
0
votes
1answer
76 views

SSH tunneling over SSL

On one of my systems there is a firewall forbidding any outgoing unless http(s)... Some users have to ssh but they can't.I tried first to run ssh on port 443 but with no success. I googled it and ...
1
vote
2answers
1k views

Help! My server has been hacked - .IptabLes and .IptabLex in /boot [closed]

I'm running a Ubuntu 6.06 dapper server and it has been hacked. I'll admit up front here that I'm a programmer and not a system administrator so even though I've worked with Unix/Linux for years my ...
0
votes
0answers
294 views

Ubuntu 13.10 - how to have a remote desktop initialized via command line?

I have few users remotely who using Ubuntu 13.10 and they have lot of issues cause they are new and learning Ubuntu 60+ age. As a result for free teaching i need to have remote access instantly in ...
1
vote
0answers
66 views

Allow users to access specified IPs only

I have a computer that offers both a VPN and a SSH server running three (separated) VPN networks. All users log into the server via ssh. However, I want that only certain users can communicate to ...
0
votes
2answers
1k views

Why can't I connect to SSH server from Ubuntu client? (while windows client is okay)

I have configured an ssh server on a Ubuntu 12.04 LTS machine. I changed the listening port to the one different from the default port 22 (that's the only change I made on the server). I am trying to ...
1
vote
1answer
102 views

How to allow SSH from internet when it is forwarded to a non-standard port

I'm configuring a virtual firewall using Shorewall and have a rule to forward the external port 2222 to internal port 22: DNAT inet lan:192.168.1.2:22 tcp 2222 where 192.168.1.2 is the ...
1
vote
0answers
57 views

Remote ACCESS - SSH listening port filtered out by Firewall?

I am trying to access a remote server, with no physical access. I have accidentally changed the previous listening port in SSH and forgot to change it in the firewall rules. In firewall 15000 is ...
0
votes
0answers
191 views

Configure Firewall to use SSH Tunnel Through Port 80

I am having some issues configuring iptables to use SSH Tunneling through port 80. Here are my iptables rules. :INPUT DROP :FORWARD DROP :OUTPUT DROP -A INPUT -m state --state RELATED,ESTABLISHED -j ...
0
votes
0answers
52 views

Help Configuring Iptables Rules

So I am accessing my server remotely using PuTTy. I am using port 80 for SSH because port 22 is blocked at my school. I successfully configured Iptables to accept port 80 and I dropped all other ...
0
votes
1answer
4k views

How can I allow ssh connection from an IP subnet on port 10022 using iptables?

I need to set up a server with public IP for bandwidth testing, and I already have a script to drop all incoming traffic except for the ports I need. I have changed the ssh port from default (22) to ...
0
votes
0answers
180 views

SSH only works with default port outside LAN

I have the openssh-server installed in one pc and I was connecting normally to it from outside and inside the LAN using SSH in the port 10465. However, one week ago or so, I could not connect to it ...
0
votes
0answers
107 views

Help with ssh between machines on local network [duplicate]

I have two machines on my local network (both with Ubuntu 10.04) and I want to ssh (and rsync) between them. The two machines have fixed IPs 192.168.0.15 and ...17 Both computers frequently ssh ...
0
votes
0answers
497 views

Iptables: deny all traffic from IP except for ports 80, 22222, 22223

I've got 2 servers: ClearOS external interface 192.168.1.90 internal interface 192.168.3.1 Ubuntu Server: connected to ClearOS to IP 192.168.3.90 I need to deny all traffic from IP ...
0
votes
2answers
14k views

SSH connection refused when connecting remotly

I set up my Ubuntu server and it can connect to itself when running ssh localhost. However, when I run Putty on windows 8 I get a "connection refused" error. I have, to the best of my ability: ...
1
vote
0answers
140 views

ssh client times out to some servers, works on others

I have a strange problem and I'm not sure where to begin. My ssh client works on some servers but times out on others. Obviously, I checked that the servers are accessible via ssh from other ...
1
vote
0answers
383 views

How to find out what is blocking a port

I have 3 machines: Machine A - local network Machine B - local network Machine C - external network Local network has a dynamic IP and Dyndns is set up to forward it. I have ssh on Machine B ...
1
vote
1answer
2k views

Installed Xubuntu desktop on Ubuntu 12.04 server and now can't connect via SSH

I have a ubuntu 12.04 server that I could connect to fine using ssh over the internet. I installed the xubuntu desktop on it, didn't change any settings, then suddenly ssh stopped working. I can ...
2
votes
2answers
988 views

How do I set up a linux proxy for my mac

As my title suggest, I would like to set up a proxy in linux. The client that I'm using is a mac osx lion. I think I understand the theory but I keep hitting roadblocks. I started using set proxy ...
0
votes
1answer
852 views

Cannot ping between computers, but I can connect (only one way though)

I am new using Linux, so I would really appreciate a simple as possible answer. I cannot ping between two computers, neither to nor from. I can ssh from one computer to another, but not the other way ...
2
votes
1answer
1k views

Configure firewall (Shorewall/UFW) to allow traffic for services on an Ubuntu Server

I have an Ubuntu Server 11.04 x64 which I want to secure. The server will be open to Internet and I want to be able to SSH/SFTP into the machine and the SSH-server runs on a custom set port. I also ...
8
votes
2answers
5k views

How to set up an Ubuntu 10.04 machine to accept ssh requests only from within the local network?

I am about to install 10.04 (from bare metal to replace 9.04) and I want to set it up so that I can shh into the machine, but only from other machines on my local network. (I.e., I want to reject all ...