0
votes
1answer
159 views

Can't ssh into server, connection refused

I can't ssh into my server. The server is on a private network administrated by me. Ubuntu is version 14.04. This started when I changed to a wired ethernet card. The client is MobaXTerm (latest) ...
2
votes
0answers
238 views

Not pinging with host-name and can't ssh using hostname [duplicate]

I have setuped a DNS server in Centos6.5 and its working with every client machines other than ubuntu, now i have issue with ubuntu While im trying to ping from desktop machine to DNS server as ping ...
9
votes
3answers
1k views

Is someone trying to hack into my server? What can I do?

A few weeks ago I posted a question here about some ssh issues I was having with an Ubuntu 12.04 box. Fast forward to today and I am trying to allow someone else access to the machine, but they keep ...
0
votes
1answer
453 views

Can curl localhost, but can't access port 80 from LAN

I can't find an answer to this question anywhere. I have ssh access set up, and can tunnel into my server. When on the server, I can curl localhost and get a response: curl localhost However, when ...
0
votes
0answers
318 views

ssh: connect to host 192.168.0.5 port 22: Operation timed out?

I My ssh on my system isn't letting me connect from my remote system, I have ports 22, 25565 and 10000 set to allow incoming connections on iptables, but when I connect it gives me the timeout error. ...
3
votes
2answers
5k 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 ...
1
vote
0answers
77 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
0answers
220 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
61 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 ...
1
vote
1answer
5k 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 ...
1
vote
0answers
338 views

fail2ban block retry count always changes

As title mentions clearly, fail2ban block retry count always changes. I set all retry counts to 3; but sometimes it blocks me after 6 or 7 retries. How can set its behavior a constant value? I added ...
2
votes
2answers
5k views

What do I have to add to this iptables setup to allow mysql access through ssh?

I just want to be able to access mysql through ssh, but I don't want to accept everything as well. What's the most secure way to do this if any. Here are my rules: *filter :INPUT DROP [14:1434] ...
0
votes
0answers
175 views

IPTables SSH lockedout

I have followed the instructions on this article (link below) to setup a PPTP VPN server, I was connected to my box over SSH when doing so. After rebooting I am unable to connect again, I have ...
3
votes
1answer
177 views

Setting up catch-all with iptables

I'm trying to setup a iptables which only allows traffic in via ssh and a catch all that blocks everything else coming into computer. The iptables -L output looks like this Chain INPUT (policy ...
0
votes
2answers
2k views

How to tunnel traffic to certain destinations over ssh?

I'd like to send traffic destined to certain ip/subnet through one ssh socks5, while routing other traffic through another socks5 tunnel. I'd tried tsocks with following configuration: path { ...
1
vote
1answer
2k views

How do I add a dyndns alias to my Iptables?

First of all: I'm aware of this old question: iptables allow dyndns domain name and auto update rules But somehow it doesn't help me. The Problem Iptables on my work pc are configured to drop all ...
12
votes
5answers
18k views

How to secure ubuntu server from bruteforce ssh attacks?

I have my passwords secure, but I heard people complaining about perfomance of a server going down drastically when a bruteforce attack is taking place. How can I secure my ubuntu 10.10 server from ...