0
votes
0answers
27 views

vino-server: local connection works but not remote connection

I would like to remotely take control over ma grandma's PC, where I installed lubundu 14.04.1. This is not a duplicate of this other question (I want to avoid teamviewer + see below). I configured ...
0
votes
0answers
6 views

network bridge not forwarding traffic from span port on router

I want to run several security network tools in LXC containers like ntopng, suricata, snort, etc. I hooked one of my server's NIC's up to a port that is spanned to my firewall... so basically this ...
0
votes
1answer
34 views

I have some questions about Firewall [closed]

So I am pretty new to Linux (With the exception of Android), and being use to the old ways of Windows pretty much all I had to do for Firewall was turn it on and forget about it. However with Ubuntu ...
0
votes
0answers
23 views

Processes in docker cannot connect with ufw enabled

I'm trying to setup a server to use ufw with docker (via dokku.) When ufw is enabled, I cannot open connections from one container to another. When it's disabled, I can connect fine. As an example, I ...
0
votes
0answers
19 views

Has Ubuntu some firewall activated by default?

Because I can't seem to connect to my ip-cam. And mnap produces alternating results if I use the cams IP address: Nmap scan report for 192.0.0.64 Host is up (0.00079s latency). Not shown: 991 closed ...
0
votes
1answer
48 views

what could be blocking port 5060 on my ubuntu 14.04?

I have a ubuntu 14.10, and am trying to telnet into it via port 5060 but I keep failing. I always get the message "Connection closed by foreign host". I checked my iptable, it is default policy to ...
0
votes
0answers
53 views

Port 80 apparently closed ubuntu 14.04

I'm installing a small server on the company where I work. I go to whatsmyip.org and it tells me it is 190.124.165.35. When I go to canyouseeme.org it tells me that the connection timed out for port ...
0
votes
0answers
24 views

Ethernet connection blocks some traffic while wifi works flawlessly

I'm not sure whether it's related, but I recently tried to reroute inbound traffic from a user-accessible port to port 80 following these instructions: http://serverfault.com/a/112798 Now, I can't ...
0
votes
2answers
57 views

find mac address of all connected systems [duplicate]

How can I find out how many system are connected to the local network and how can I get all IP and mac address of these systems. Is their any command/package to show the IP details? Can I use this ...
1
vote
0answers
70 views

Why aren't these ufw rules working?

I'm trying to configure ufw to only allow connections to 3 ip addresses on my local network, and deny everything else. Here's the commands I'm using: yes | sudo ufw reset sudo ufw default deny sudo ...
0
votes
0answers
25 views

Can't find Printer in the Printing program Officejet 6500

I have the following problem: I can't find my HP Officejet 6500 Pro to connect it with my Ubuntu 12.04 laptop. Before it worked perfectly, but since I use an extra router I cant connect to my printer ...
0
votes
0answers
169 views

Creating routes using iptables in ubuntu 14.04

I'm a newbie at ubuntu's administration although I've been using linux for a while just at user level. Let's show my problem. This is my network (only static IP addresses are used, for both private ...
0
votes
1answer
52 views

keep getting added to hosts.deny + iptables

I am confused to why this has started to happen. On my local network, if I click 10-20 apache/http links my server will decide to add me hosts.deny file and block me on iptables. Its not just ...
0
votes
1answer
289 views

How to open the ports on firewall in Ubuntu? [duplicate]

I'm pretty new to Ubuntu. I just want to open the most common ports namely FTP (port 20 TCP/UDP) HTTP (port 80 TCP/UDP) SMTP (port 25 TCP) ETC I've tried all the ways in iptables, ufw, and gufw. ...
1
vote
0answers
38 views

Ubuntu Randomly Rejecting Hosts

currently I am facing a very strange problem: my Ubuntu is randomly resetting connections and I have no clue why. /etc/hosts.deny is empty (resp. just the default file with comments only, that comes ...
0
votes
0answers
69 views

iptables rules keep showing up

I just installed an ubuntu precise server, after a few weird communications issues I checked the iptables list and found: Chain INPUT (policy DROP) target prot opt source ...
1
vote
0answers
36 views

Connecting to Ubuntu host not possible

I have an Ubuntu-Host which is connected via wlan (and for testing to wired net) to a local net. This Ubuntu-Host is not reachable via network by any other clients on the same network. But: If I do a ...
1
vote
2answers
88 views

What is MASQUERADE in the context of iptables?

In Iptables many times I see the target MASQUERADE. What is that. I searched and find lots of things. But I need some one explain me what MASQUERADE is in a so easy way? **If you bring an example ...
0
votes
0answers
41 views

ufw is not working properly

I'm trying to enable ufw in remote ubuntu server. This server has two LXC container running. One container has nginx server running and I have hosted web application, right now every thing is working ...
1
vote
0answers
52 views

Dynamically Enable LAN traffic in Firewalld (using profiles in network-manager)

I am trying to use firewalld to allow dynamic profiles for different connections in Network Manager. When I'm at home, however, I would like to allow anything coming in on the LAN (local subnet). I ...
1
vote
0answers
47 views

Ubuntu server periodically unreachable

I have an Ubuntu Server 14.04 server running. The server has two NICs and acts as a NAT router, with the help of shorewall. Shorewall also acts as a plain firewall for blocking ports that I don't want ...
0
votes
1answer
42 views

iptables ruleset blocking all network activity?

I've gone through numerous trial and error to recently discover that my iptables result is the culprit of blocking all LAN and WAN activity. I know this, because if I comment out the last line in my ...
3
votes
1answer
177 views

Docker is blocked by UFW

I have problem with Docker network in ubuntu 14.04. I have installed Docker.io from official repo and I've added DEFAULT_FORWARD_POLICY="ACCEPT" to /etc/default/ufw but my Docker containers still ...
1
vote
0answers
100 views

Port forwarding out multiple VLAN interfaces that have same IP address

So I have an Ubuntu machine with multiple VLAN on an interface eth1 and each VLAN has the same IP address (172.16.0.2). I need to be able to simultaneously telnet into a rack of devices that are also ...
1
vote
0answers
50 views

Can't access Flask from local network

I've already read this thread, but it is not what I'm looking for. I'm running Flask on Ubuntu 13.10 with this configuration, but I can't access it from the local network using the correct ip and port ...
0
votes
0answers
39 views

Connection timed out on specific ports

We have an apache server running couchdb on port 5985 (not 5984). On my computer, I have Windows 7 and Ubuntu 14 LTS. From Ubuntu, I can connect to the host via http://example.server.domain, but I ...
0
votes
0answers
42 views

Synergy works one way only?

I am running two Ubuntu 12.04 machines connected to the university network. One is a desktop and the other a X230t Lenovo laptop. They are both wired(eth0) to the same network. I am trying to get ...
0
votes
2answers
124 views

How do I with ufw deny all outgoing ports excepting the ones I need?

I did the following: ufw default deny outgoing, sudo ufw allow out 80 which I thought would let me use the Internet but didn't can y'all help? Also are there any other ports used by Ubuntu for which ...
2
votes
1answer
134 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
40 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
77 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
212 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
74 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
61 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
67 views

Port won't open! [duplicate]

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
70 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
80 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
75 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 ...
7
votes
1answer
326 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
99 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
101 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
176 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 ...
2
votes
2answers
446 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
50 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
496 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
262 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
20 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
333 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
204 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
79 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 ...