2
votes
1answer
29 views

ufw firewall disabled - How to turn it back on?

I am using Ubuntu 12.04 and just recently noticed, that my ufw-firewall is turned [off]. I know It's turned [off] by default, but when I set Ubuntu up, I turned [on] the firewall with: sudo ufw, but ...
0
votes
1answer
11 views

Ubuntu forward ports, default state, forwarding not working?

im running ubuntu 12.04.4 server. I been googling the nett for answers, but could not find any.. I would like accsess a few web-gui's on my server. I have forwarder the ports in my router, worked when ...
0
votes
0answers
25 views

Using Gufw create rule to reject traffic from specific subnet

I am connected to two networks one trusted, one not. Untrusted range is 172.18.0.0/16. (I need some connectivity with it, but not all ports open.) I would like to setup Gufw to reject connections on ...
0
votes
1answer
59 views

Iptables and bind9 to forward to google's dns

Hello i have a very hard time on getting along with iptables and bind9 as my internal network dns server. It's configured to forward my queries to google's dns (8.8.8.8). The main problem is i can't ...
0
votes
0answers
45 views

Setting up a firewall Ubuntu Server 13.10 to specified domain users of a Windows server 2008

So, here's the plan: I want to set up a firewall that allows/blocks certain websites for specified users in a Windows server domain (local); For example: For the user domain.name/user1 I want to ...
0
votes
1answer
28 views

enable port 9696 on ubuntu server

I am using ubuntu server lts 12.04 on vmware virtual machine. I need to enable port 9696 which is blocked or filtered. When i use the nc -v -w 1 localhost -z 9696 command it shows me the following ...
0
votes
0answers
44 views

Port won't open!

I have a server that want to allow connections into it through port 25565, but when I test on http://www.yougetsignal.com/tools/open-ports/ it says they are closed? I have no outfacing interface ...
0
votes
0answers
49 views

Analyze firewall logs to track intrusion

I have just started this topic where the firewall on my router detects intrusions e.g. Mar 11 14:15:11 kernel warning kernel: [fwlog] Intrusion -> SRC=85.102.133.241 DST=109.78.126.234 ...
0
votes
0answers
48 views

how to set up iptables for dyndns server?

I have a server running with a dhcp public IP and ddclient updating my hostname from my public IP whenever it changes. My ISP has a feature for dyndns, so my router should automatically map my public ...
0
votes
0answers
42 views

Iptables help with server on 12.04?

I am trying to create a Minecraft server with port 25565 for me and my friends to access. I used to run one on my mac, where I would change the config for my firewall to allow connections through ...
6
votes
1answer
297 views

Why are certain things able to get through ufw firewall?

I should say up-front that I am TOTALLY new to Linux, Ubuntu, and the technical side of networking. I am setting up Ubuntu on a server computer and have learned a bit about configuring the ufw ...
0
votes
1answer
48 views

Setting up Ubuntu server with firewall - do I need 2 NICs?

Assume a LAN where 4 port ADSL Router, Server and PCs all connect to a network switch. Apart from working with the server, the workstations must have restricted access on what sites they can use. For ...
0
votes
0answers
67 views

Routing 192.168.168.0/24 out eth0, all else out wlan0

Good Morning/Afternoon/Evening, I have been tasked with the configuration of multiple, sonicwall ISR's, and thought i could use this as a bit of a Linux learning curve. What i am attempting to do, ...
1
vote
0answers
106 views

UFW, IPv6, and HTTPS

I'm running Kubuntu 13.10. I recently enabled IPv6, and setup UFW to support it. Everything seems to be working as expected, except I've noticed certain traffic being blocked with an AUDIT-INVALID ...
0
votes
1answer
115 views

UFW not blocking connections to docker instance

I have a webservice running inside a docker instance which was run using the following command: sudo docker run -d -p 4040:4040 .... My UFW rules look like this: ~ sudo ufw status Status: active ...
0
votes
1answer
37 views

Samba problem — is it a firewall issue?

I have just installed Ubuntu 13.10 on a computer I use as archive for other machines. I need Samba working from various Windows 7 machines. I have confirmed that smbd and nmbd are both working, and ...
2
votes
4answers
190 views

How to deny an ip address from connecting to my system?

Is there a way to deny an IP address from connecting to my Pc? Is there a way to deny an Ip from connecting to specific Port?
0
votes
0answers
210 views

Minecraft Spigot Server BungeeCord and Iptables Help

I have had a BungeeCord server set up before and I know how it works. The problem I am having is with my iptables configuration. These are my iptables rules: #!/bin/sh #INPUT iptables -P INPUT DROP ...
0
votes
0answers
15 views

Transmission unable to access internet

It seems none of my BitTorrent clients are able to access the internet, including the system default, Transmission. I have recently changed my router's password and firewall settings,and I'm thinking ...
0
votes
0answers
290 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 ...
0
votes
1answer
86 views

Server not found problem

I've encountered an problem, maybe trivial - when I try to load this page: http://home.thep.lu.se/~torbjorn/Pythia.html I recive classic 'Server not found' page. I'm using Mozilla Firefox on Ubuntu ...
1
vote
1answer
56 views

Trace IP from MAC

I have a Virtual Server running Ubuntu at a hosting provider. In the last couble of month I have experienced a dramatic increase of inbound traffic. All of it being UDP packets. Looking in the logs ...
0
votes
1answer
214 views

Connect to mysql database on Ubuntu host from windows guest

I have Ubuntu 12.04 on my laptop and have a Windows 7 guest on (VMWare). I would like to connect to the mysql database on Ubuntu host from Windows guest.Kindly tell me how to do the same. I have tried ...
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 ...
0
votes
0answers
54 views

Telnet timing out on port 22 and port 23

Hello all So here is what I've done so far... I have turned off my firewall TEMPORALLY on both client and server, so does my router. My router has port forwarding on both ports 22 and 23 pointing to ...
3
votes
1answer
289 views

Are my ports opened?

Im using virtual server on hosting. There is Ubuntu 12.04 LTS. Im building pool websites, and stratum mining. I can connect to stratum on port 3333 via minerd on server, but cant connect from outside ...
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
1answer
31 views

Trouble saving iptables

I am having some issues with removing an iptable entry I have entered. I added -A PREROUTING -d 95.211.213.149/32 -i venet0 -p tcp -m tcp --dport 443 -j REDIRECT --to-ports 1194 To experiment ...
-1
votes
1answer
497 views

Open source stun turn server which can do hole punch is there similar packages?

Is there any open source stun/turn server which can do hole punch like numb for Ubuntu ? Numb is a STUN/TURN server. Description A STUN/TURN server is used for NAT traversal in VoIP. ...
2
votes
1answer
3k views

Where are iptables's rulesets stored on Ubuntu 12.04?

Ubuntu 12.04 LTS - iptables v1.4.12 TLDR: Where are iptables's rulesets saved when invoking iptables-save <ruleset-name> ? Explanation: According to this answer basic way of saving ...
0
votes
1answer
144 views

Apache timeout, OK on localhost

I have been staring at this for 2 hours now and can't figure it out. My webserver was running fine until earlier today. But now it can't be accessed from the Internet. The server is apache2, but ...
0
votes
0answers
139 views

UFW blocking random packets on 443

All, I have UFW setup to allow traffic on port 443. It works as expected, though I have a large amount of UFW Block log entries. To Action From -- ...
0
votes
0answers
31 views

Too Many unsolicited “Incoming Connections”

With the ufw rule "deny incoming", ufw logs as many as 2 to 3 block packets from random IPs on random ports. I find it quite irritating. I was just wondering if this is normal "midirected" internet ...
0
votes
1answer
51 views

after software update, website not accessible

I just applied a bunch of recommended updates this morning (which seems to have upgraded the kernel to 3.8.0-32.47), and suddenly I cannot connect to the machine on port 80 (http) or 22 (ssh). Ping ...
2
votes
0answers
115 views

found someone lurking in my LAN, not sure what to do next

I have DD WRT router with internal numbers all falling within 192.168.1.0/24. I was looking on my firewall records this morning and found someone at 10.10.109.100 got blocked from accessing port 5353 ...
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
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
2answers
677 views

Ubuntu - apt-get not working behind restricted internet access

I have Ubuntu 12.04 64-bit boxes running in a company but they have internet browsing and firewalls for security. When I do apt-get update or install it fails. But I have a remote server which ip is ...
1
vote
1answer
275 views

Understanding Iptables

iptables -A INPUT -m state --state NEW -m tcp -p tcp --dport 7000:7010 -j ACCEPT I trying to understand the -m state --state NEW part. Searching through the man pages and correct me if I am wrong ...
0
votes
1answer
773 views

How to make ubuntu gateway?

i am new on Ubuntu. i want to make a gateway. i have some 25 systems and switch but i don't have any server. i want to setup a system as a gateway system and want to make a firewall. i want that ...
2
votes
1answer
2k views

Apache (and other services) work on localhost, but not IP address

My Apache server is working correctly on port 80. When I try to enable SSL on port 443, I can connect via localhost (telnet localhost 443) but not via IP address (telnet xxx.xxx.xxx.xxx 443). To ...
4
votes
1answer
483 views

Why ufw is blocking my outgoing traffic?

Here is my status: $ sudo ufw status verbose Status: active Logging: on (medium) Default: deny (incoming), allow (outgoing) New profiles: skip To Action From -- ...
1
vote
1answer
536 views

How to configure a firewall that only allows a few webpages and dropbox and U1 services?

Can anyone give a step-by-step how-to that explains how to block all outgoing internet traffic to all websites, but allows only a selected list (needed for working, fi. online dictionaries) allows ...
0
votes
1answer
207 views

Screen Sharing Behind Firewall

I've setup my brother's computer with Ubuntu. I would like to be able to control his screen with his permission, to configure and instruct him when needed. However, he is on a provide IP provided by ...
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 ...
1
vote
0answers
581 views

SSH connections rejected after UFW allow 22

I am trying to setup UFW on a 12.04 server. SSH works great with UFW off. Setting root@ugvps:~# ufw enable Firewall is active and enabled on system startup root@ugvps:~# ufw status Status: active ...
2
votes
0answers
749 views

IPTABLES > MAC Filtering

I am newbie. I tried DHCP Mac filtering is not enough to secure our networks and I think iptables will... This is my concept: I set a new laboratory (LAB) network. My other network is connected to a ...
0
votes
0answers
222 views

I need some help proof reading my IPtables rules, my rules seem to work but I cannot be sure

Like the title says, I need some help proof reading my iptable rules, my rules seem to work but I cannot be sure. My set up is as follows: ISP ---> cable modem ---> Ethernet switch ---> ...
1
vote
1answer
101 views

iptables help needed in 1304

I've setup my raring-ringtail machine and decided to use iptables after removing ufw to have more control over my network security. However, I'm stuck at one point. First, I've set default policy to ...
1
vote
0answers
223 views

New Server - apache will not serve outside LAN

New server, running well 12.04 LTS on HP ML350. Apache = great, inside our LAN. Apache = timeout, from WAN (NAT forwarded from firewall). I have cleared all Iptables, read & checked every ...