a technological barrier designed to prevent unauthorized or unwanted communications between computer networks or hosts

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Adding firewall rule makes multiple entries

I am trying to add a rule to my Ubuntu 14 iptables to allow NTP (123) though using the command for "Allowing Incoming Traffic on Specific Ports" here: https://help.ubuntu.com/community/IptablesHowTo ...
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22 views

Ubuntu server websites offline after enabling firewall [on hold]

I enabled Ubuntu firewall using this command: sudo ufw enable Immediately all my websites are offline. I tried logging into the terminal but I get connection timed out. On the panel of my server ...
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17 views

remote CORBA lookup (firewall, port, telnet)

I'm trying to do a CORBA lookup on a LAN from one pc to another. How do I troubleshoot the connection? On the server running glassfish: thufir@doge:~$ thufir@doge:~$ ...
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1answer
38 views

UFW - How to make it easier and what are stealth ports can UFW have these? [closed]

Let me show u what I jusat wasted 2 hours doing: To Action From -- ------ ---- 22 REJECT Anywhere 23/tcp ...
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23 views

error: Idle Subprocess didn't make a connection. Either Idle can't start a subprocess or personal firewall software is blocking the connection

When i run idle it returns the above stated error. It happened after I installed python 3.4. both 2.7 and 3.4 are giving this error.
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35 views

Setup Server for Small Office (14.04)? [closed]

It's been 3 months & i'm watching that my team is sucking up all my internet data in downloading,surfing, updating mobile Apps via WiFi, watching videos etc etc. But, now i'll not sit like a fool ...
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1answer
73 views

Adobe on Ubuntu 14.10

I want to install Adobe Master Collection CS6 on Ubuntu. I've installed Wine. ( the newest version. What I have allready done: sudo add-apt-repository ppa:ubuntu-wine/ppa sudo apt-get update sudo ...
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17 views

Iptables: some ports are closed despite being open by my iptables; can it be something else?

Beginner question. I set up the following iptables rules: #!/bin/sh # Réinitialise les règles sudo iptables -t filter -F sudo iptables -t filter -X # Bloque tout le trafic sudo iptables -t ...
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1answer
86 views

ERROR: problem running ufw-init

I tried setting up ufw on my remote Ubuntu 14.04 server so i installed it and allowed ssh with the command sudo ufw allow ssh after that I tried to enable ufw but I get the following error: ...
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25 views

How to know the all minimum privileges that software needs?

I am using a VPS as a public proxy, and I have begun to realize that I must make my VPS more secure as I have seen in Securing Public Shadowsocks Server. Shadowsocks is a fast tunnel proxy that helps ...
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3answers
63 views

Ubuntu / Apache2: I cannot open port 443 [duplicate]

I am trying to install a SSL certificat on my Ubuntu 14 server (using apache 2). For some reason the port 443 appears to be closed I installed and enable ssl /etc/apache2/ports.conf is as ...
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34 views

Firewall Config to get access to ports via eth0

My headless ubuntu Server has an OpenVPN client that connects to a gateway provided by PIA. I gathered some settings provided here to basically setup kill switch I have a domain that redirects to ...
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1answer
29 views

FTP and WWW services don't acknowledge connections

I have Lubuntu 14.04 LTS with vsftpd and the lamp stack (apache2, etc.) installed. Everything works fine on the LAN. Externally, the services don't acknowledge connection attempts. I can see packets ...
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17 views

VSFTPD setup not working

Good day I think I've been trying to tackle this issue for over 2 months now (with breaks of course) Here's the thing, I've set up the FTP server, it appears to be running (I can use Filezilla, ...
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1answer
34 views

Linux Firewall ala Outpost

Does linux (Ubuntu) have GUI firewall like Outpost. I need it to look out what apps are generate in/oun bound traffic.
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53 views

How can I allow ap-hotspot in ufw Ubuntu 14.04?

When ufw is enable android stuck in obtaining ip address and cannot connect to wifi. I try sudo ufw allow dhclient and sudo ufw allow dnsmasq bot both had ERROR: Could not find a profile matching ...
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22 views

I don't have a port allowed in UFW but still able to access server CP at it

Default of firewall (UFW) is to deny all that isn't allowed well 8083 isn't allowed but i'm still able to access the control panel with https://serverip:8083 Status: active To ...
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1answer
29 views

NFS Client Ports

So I've been trying to get my head around how an NFS client figures out which ports to use, or how to set them. I enabled logging (In iptables on the nfs client) for traffic between the nfs client ...
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1answer
49 views

loading “explicit” iptables rules on boot or interface up

I'like to load iptables rules on boot or interface going up on Ubuntu. Made a search on StackExchange and other places and looks like the most commonly agreed approach is either use ...
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1answer
31 views

Ubuntu Server Firewall

First of all I am new to Ubuntu server. I am still trying to understand and learning about how does firewall. I want my firewall like if you fail 3 times it will time out. Is there any body could be ...
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0answers
38 views

Cannot access apache server from LAN

I set up a virtual host for my web app: <VirtualHost *:80> ServerName myapp.localhost.com DocumentRoot "/home/user/projects/myapp/public" <Directory ...
0
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1answer
58 views

Does Ubuntu come with a firewall? [duplicate]

I'm new to ubuntu, does it come with a firewall installed or will I have to install one, if so which one is best.
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72 views

Firewall is blocking NSF requests from/to random UDP ports

I really hope someone can stop me from pulling my hair out! Normally, I can find the answer t what I'm after with a few simple searches, but I have worked on this off and on for weeks now and am ...
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0answers
19 views

Firewal for Ubuntu 14.04.1 [duplicate]

Is there a firewall for Ubuntu 14.04.1 that asks for every program that wants to enter or exit?
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1answer
284 views

Can't connect to PPTP VPN with ufw enabled on Ubuntu 14.04 with kernel 3.18

Suddenly VPN disconnected and can't reconnect no longer on kernel 3.18.1, so I try to install kernel 3.18.2 but my problem still exist. But I can connect to VPN with 3.14 kernel easily. The output of ...
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69 views

NFS+ufw+Autofs not working

Setup: Client server running Ubuntu 14.04 connecting to another Ubuntu Server 14.04 on NFSv4 on a local LAN. I have the firewall turned on, with routing rules to allow 192.168.42.0/24 (from/to any). ...
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19 views

No default-config with latest version of Shorewall

I'm following the guide here to setup a mail server. The first step is to configure a Shorewall firewall, which includes this step: sudo cp /usr/share/doc/shorewall/default-config/interfaces ...
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2answers
1k views

xbmc / kodi what ports to open on firewall so I can see files via upnp

I'm running xbmc / kodi 14.0 on my ubuntu 14.04 machine and I'm trying to view / watch my files located on my Kodi ubuntu machine from my nexus 7 tablet. I'm using bubbleupnp onmy tablet which can ...
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2answers
80 views

OpenVPN: Allow access only for local connections (via OpenVPN)

I was recently assigned a task to do set up a secure development environment. I am thinking of doing the following: Use OpenVPN to connect to the server. Use firewall rules to block all incoming ...
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0answers
40 views

Is this ufw configuration correct?

I have to link my openstack private cloud on a cloud management platform online. The cloud location is on my private ip (192.168.0.9) , i can't use that ip since the platform need a public ip so i ...
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1answer
415 views

How can I open port 80?

I'm new in Ubuntu, and I'm trying to open port 80. I have already set my router in order to do so, and I also set ufw. Status: active To Action From [ 1] 22/tcp ...
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1answer
58 views

How to block anything but internet(firefox) from UFW?

I want to use this flash drive only for secure access, to use my banking account and this kinds of stuffs. Which rules should I use? I'm very newbie on ubuntu, and I need your help. This flash drive ...
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1answer
45 views

How to connect remotely to WD Book Live Duo using nfs?

Connection in local network works perfect. I use nfs://192.168.0.10/nfs to connect locally. If I connect from internet I use static IP: nfs://xxx.xxx.xxx.xxx/nfs In this case it doesn't work and ...
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1answer
91 views

Forwarding ports with iptables not working?

I have an ubuntu server (14.04.1) which is asking as a router for my network. It has an internet facing interface, eth0, and a second interface, eth1, for connecting to my 10.0.0.0 network. I am ...
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1answer
34 views

How to perform detail packet capture on Ubuntu firewall?

I've routed internet traffic of my other systems on this ubuntu linux system where I have configured packet forwarding. but still I am unable to get internet on other systems. Hence I want to ...
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0answers
29 views

Allowing Longview in UFW firewall; how do these iptable rules translate to UFW-commands?

Linode has some documentation on allowing its product "longview" to go through the firewall. It offers two commands for iptables: iptables -I INPUT -s longview.linode.com -j ACCEPT iptables -I OUTPUT ...
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1answer
25 views

How do I use Juju local with a firewall?

While using ufw (Uncomplicated FireWall) and I noticed that the local juju machines were stuck in a pending state. $ juju status environment: local machines: "0": agent-state: started ...
1
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1answer
72 views

dport is not working on iptables command

In terminal I type : iptables -A INPUT --dport 443 -j DROP And it tells me : iptables v1.4.21: unknown option "--dport" what is wrong with --dport?
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93 views

ufw rules don't block deluge

I'm trying to keep deluged on my headless Ubuntu Server 14.04.1 from functioning when the server isn't connected to a VPN (I know many threads exist discussing the best way to accomplish that; I'm not ...
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34 views

Do I need to create a firewall rule after installing Android Studio?

Since I installed Android Studio, I have a new network device: virbr0. My system log files keep telling me ufw rejected an incomming connection (one time per minute) wich is kind of annoying because ...
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298 views

Deluge download speeds too slow

Total noob to Linux and Ubuntu. Dual Booted Ubuntu 14.04 and Windows 8 in my Dell Studio 1558. Everything was working fine until I noticed that my torrent speeds are very less. I tried it again with ...
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1answer
83 views

linux gateway / firewall IPtables config

The KVM host is acting as a gateway / firewall for all of the virtual machine's it runs. It has a /26 public IP space configured on LAN interface em1: 1.1.1.1/26 It has a /30 rfc1918 IP configured on ...
0
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1answer
99 views

FTP and browser network connection issues in 14.10 Utopic

I have a remotely hosted website. For long I could FTP into it and upload web content, but now when I try, Nautilus tells me after a long waiting time that "oops, something went wrong". Normally I ...
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48 views

Virtualbox server 13.10 port forwarding through router access to static IP/internet

I have an Ubuntu 13.10 server guest setup in Virtualbox (I have a windows8.1 machine). My question is: how to setup port forwarding to access the webpage from the internet. I have disabled the ...
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0answers
56 views

How to config PORT KNOCKING on CSF ubuntu server and access it by linux?

I'm trying to run port knocking work on a CSF on a small VPS, i setup this: 1 - the result of csf first test ok 2 - TCP_IN = "53,80" TCP_OUT = "53,80,113,443" UDP_IN = "53" UDP_OUT = "53,113,123" ...
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0answers
80 views

Header file for struct proc_dir_entry

I'm writing a firewall for the Linux kernel and I'm using the proc_dir_entry data structure (which I've found in the tutorial I'm currently reading). My firewall is conceived as a kernel module but ...
1
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1answer
336 views

apache2 on ubuntu 14 - localhost works but ip doesn't

I've just installed apache2 on my box, along with php5. I can navigate to "localhost" and it works. But I can't access this webserver from another machine... or even locally using the IP address. ...
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84 views

add repository under company firewall

I am trying to add apt repository for evernote on ubuntu 14.04 with company firewall. When I execute sudo add-apt-repository ppa:nvbn-rm/ppa, it stops, no response: rna@rna-P400:~$ sudo ...
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148 views

Why is ip forwarding not working in xubuntu 14?

I upgraded my gateway computer from xubuntu 12 to 14 and the computers on my home network lost their internet connection. I found that the upgrade had uninstalled my old firewall, Firestarter, and ...
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1answer
259 views

Firewall and virus software for Ubuntu 14.10 [duplicate]

I've only used a window operating systems in my life. I just began using Ubuntu 14.10 about a week ago after my old Windows OS was corrupted. Using Ubuntu 14.10, how does change the firewall ...