Uncomplicated Firewall (ufw)

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What is UFW's approach towards rules order for overlapping rules?

I need to enable UFW in my Ubuntu 14.04 Server having these conditions: - I want to deny all incoming and outgoing on all ports (and protocols) but: - I want to allow all incoming and outgoing on a ...
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How to check if ufw is running programmatically

In most services (e.g. privoxy) there is a clean way to get the service status: ps -C [servicename] Then by checking the exit code ($?): 0: the service was running 1: not running This is not the case ...
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59 views

UFW blocks traffic in NAT

I've created a VM guest with libvirt with the default NAT Bridge. (Host and Guest Ubuntu 14.04 Server) After creating allow rules for SSH and enabling ufw - on the guest - i can't connect to the ...
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68 views

How to open ports 25, 80, 443, 3306 on Ubuntu 10.04

Fresh install of Ubuntu Server LTS 10.04 on a Rackspace next gen (Performance) server needs the following ports open: 25/tcp, 80/tcp, 443/tcp, 3306/tcp. I used nmap to check for open ports, here is ...
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29 views

using ufw to block outgoing traffic to website

I want to block traffic to a specific domain e.g. mysite.com. I tried blocking the ip address of the site but it does not work: ufw deny from 0.0.0.0 to ip_address_of_site I am still able to acess ...
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How do I remove all the ufw chains from iptables?

I've removed ufw and I want to get rid of all the chains it leaves behind. How can I do that easily?
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Writing exceptions in ufw to the default forwarding policy

I've tried setting DEFAULT_FORWARD_POLICY in /etc/default/ufw to both REJECT and ACCEPT and then writing rules to create exceptions to the default forward policy. No matter what I do, it appears to ...
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61 views

Setup NAT on Ubuntu 14.04

I'm trying to insert my desktop between an appliance and the rest of the network to monitor the traffic coming off of it due to some security concerns. I'd like to setup NAT so that the devices behind ...
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UFW for OpenVPN

I want to configure ufw (uncomplicated firewall) for OpenVPN. Connections are only allowed through OpenVPN. Everything else should be blocked. So if OpenVPN is disconnected -> no internet! I found ...
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47 views

ufw not blocking traffic

I have an apache2.4 webserver, and I am trying to block a malicious subnet using ufw. Here is the UFW setup: $ sudo ufw status verbose Status: active Logging: on (low) Default: deny (incoming), ...
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Multiple rate limits in ufw

I have set two rate limits in ufw: In summary: limit http to 120 requests in 60 seconds; and 600 requests in 600 seconds -A ufw-user-input -p tcp --dport 80 -m state --state NEW -m recent --set -A ...
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39 views

Whitelist IPs for ufw

I have set some rules in ufw to rate limit connections, as such: -A ufw-user-input -p tcp --dport 25 -m state --state NEW -m recent --set -A ufw-user-input -p tcp --dport 25 -m state --state NEW -m ...
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How to configure ufw to allow ruby gem installs on 12.04?

I have the following setup: To Action From -- ------ ---- 10022 ALLOW IN Anywhere 80 ALLOW IN ...
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38 views

UFW behind a router blocks traffic from the outside world

I'm seeing [UFW BLOCK] entries in my logs, where SRC=173.194.67.16 DST=192.168.1.2. My box is behind a router, DST is my internal IP, SRC seems to some Google server and I don't understand how is it ...
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problem with UFW

Following this tutorial I executed the following commands: sudo apt-get install ufw sudo ufw allow ssh sudo ufw allow http sudo ufw enable sudo ufw status verbose and I get: Status: ...
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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 ...
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ufw - How can I open up a port to a range of ip's (UB 14.04)

i wonder if you can help me. I want to open up a specific range of ips to port 22, e.g from 32.46.23.113 to 32.46.23.126, how would I do this with UFW? I've had a look at subnet masking and have seen ...
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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 ...
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iptables debugging on ubuntu 12.04

ufw was blocking the incoming ssh connection. So removed and purged the ufw still the incoming ssh connection is blocked. But there is not logs in dmesg output. I am sure sshd is running, tested ...
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Ubuntu Server and ufw as a router - defining IP addresses that can be routed

I built following network with Ubuntu Server: Internet ---- eth0 (DHCP, NAT) -- Ubuntu1 -- (eth1 10.1.0.1/16) ------> <------ (eth0 10.1.0.2/16) -- Ubuntu2 -- (eth1 10.2.0.1/16) ------ ... ...
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The program 'iptables' is currently not installed

I am a newbie, so my apologies up front. I am trying to get DansGuardian installed (which I believe I have) and working. To get it working I need to filter IP traffic through the app via iptables. ...
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48 views

ICMP requests are blocked

I connected a Kubuntu 14.04 machine to a Debian 7.0 with a cross cable. The problem: ping is one-directional. Kubuntu machine can see Debian, but Debian can't ping Kubuntu. Notes: Firewall is ...
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before.rules date [closed]

I can't figure out why one of my before rules file has a date that is in the future. Today's date is July 3rd but the file time stamp states Jul 6. Below is the output from ls -l in the /etc/ufw ...
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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 ...
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117 views

ufw throws “bad port”

On Ubuntu Server, I try to open port 5432 for postgresql: $ sudo ufw allow 5432/TCP ERROR: Bad port Postgresql is not currently running and netstat shows no processes currently using that port. ...
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59 views

Iptables Issue can't SSH Remote Machines

I want to SSH to 192.168.1.15 Server from my machine, my ip was 192.168.1.99 Source Destination was UP, with IP 192.168.1.15. This is LAN Network there are 30 Machine's Connected to the network and ...
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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 ...
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373 views

14.04 missing “/etc/init.d/ufw”? my firewall never auto starts

I need to know how to fix the missing "/etc/init.d/ufw" file, is it some package or some command? I used the gufw to enable it, but on reboot my firewall was still off... I created a symlink ...
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150 views

How to reset/flush remove ufw rules in recovery mode in ubuntu 12.04

Hello I think I have mistakenly locked myself from a remote server (ssh). I had a way to restart in recovery mode but it seems ufw is not even installed when in recovery mode. should I follow ...
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Ubuntu 13.10 allows connections from LAN but not from outside LAN

SSH ports configured to all 22 and another one. I can connect from another Linux/Windows workstations on my home LAN no problem. Same thing for nomachines nx server. Teamviewer connects with no ...
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Ubuntu UFW init failure

I have some strange UFW behaviour. Whenever I install it cleanly and add some allowed ports to it (without restarting) it works great. But when I restart UFW or the whole server for the first time ...
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146 views

configuration for ufw to allow upnp between desktop and xbox360

I am really stuck with this question. I am using Ubuntu 14.04 I cannot enable UFW to allow a connection between my desktop and Xbox 360 stream media when UFW is enbaled. The connection and streaming ...
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84 views

How to block ip forwarding for specific remote ip address

I use ubuntu as gateway for several hosts. I need advise how to block ip forwarding for specific ip address or specific ip range? I tried to block ip via ufw deny rules, but it looks like ip ...
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230 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 ...
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199 views

Uncomplicated Firewall blocks playing streames in VLC

Can anybody help me please how to allow IGMP protocol in UFW? My provider streams TV signal. I have .m3u8 file as channel list. It contains items as udp://@239.1.1.42:11111. VLC does not open the ...
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UFW rules don't work with docker

I have a 12.04.4 server, and I have enabled ufw, and have tried to block port 8080. However, it is still open. $ sudo ufw deny 8080 Rule added Rule added (v6) $ sudo ufw status numbered Status: ...
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can't allow a specific IP in ufw

I've just got myself a VPS and am completely new to running a server. I've installed ufw as I only want to allow access to it from one particular domain hosted on another server. I've read the ...
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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 ...
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124 views

Preseed file whith ufw command do not work

In Trusty the command ufw ufw/enable boolean true works very well, but the ufw ufw/allow_known_ports multiselect SSH do not work. Why?
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367 views

Redirect UFW logs to own file?

Is there a way I can easily redirect the entries for UFW to their own log file at /var/log/ufw instead of filling up /var/log/syslog as it's becoming tricky to find solutions to problems with all this ...
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Trouble installing ircd-hybrid

I have installed ircd-hybrid and commented out the host line in /etc/ircd-hybrid/ircd.conf I have also allowed ports 6665-6669 in ufw and restarted ircd-hybrid This is the error I get when trying ...
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177 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 ...
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487 views

what does this mean “80/tcp filtered http”

Our linux server(ubuntu) stop listing on port 80. this is what i got : PORT STATE SERVICE 22/tcp open ssh 80/tcp filtered http what does this "80/tcp filtered http" means? What ...
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734 views

Problem with ufw enable: libkmod: ERROR ../libkmod/libkmod.c

I am trying to enable ufw and this is the output: root@p:~# ufw enable Command may disrupt existing ssh connections. Proceed with operation (y|n)? y ERROR: problem running ufw-init libkmod: ERROR ...
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108 views

How can I check what ports an app is using so I can enable them in ufw?

With the soon to be demise of Ubuntu One I started looking at other ways to store backup in the cloud. I already had the Dropbox client installed and have been storing back ups there for now. Not ...
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why are glided and glideusd listenening on tcp ports 3490 and 3492?

Ubuntu 12.04 LTS Dell factory pre-install on a Precision M4800. ~$ sudo ufw show listening tcp: 3490 * (glided) 3492 * (glideusd) I believe these are related to the glidepoint touchpad, but why ...
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122 views

Why does DEFAULT INCOMING DENY not stop Firefox from working?

If UFW is actually not an application layer firewall but a "interface to iptables", how can it be if I have by DEFAULT INCOMING DENY and OUTGOING ALLOW setting that ANY internet application is ...
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Notificaciones de Ufw

Anterior Utilize Gufw y firestater ellos me daban notification de conneciones no desea a puertos y/o cualquier tipo de accion que no yo no quiciera pero estoy avanzando a ufw (La Base y no logro ...
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188 views

UFW locks me out of server everytime I run it

Background: I'm setting up a new 12.04 instance on a VPS with a new provider.The VPS provider only offers a 32bit image but that really shouldn't matter here. I have no local access to the machine and ...
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1answer
174 views

Can't Get UFW Firewall to Allow Anything

I'm trying to set UFW (using GUFW) to create a firewall that only allows network connections when OpenVPN is connected. So in GUFW I deny incoming and outgoing connections and enable the Firewall. I ...