Uncomplicated Firewall (ufw)

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3
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4answers
3k 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 /etc/...
1
vote
0answers
2k views

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 ...
0
votes
1answer
631 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 ...
1
vote
1answer
250 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 ...
4
votes
1answer
479 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
2answers
1k 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 ...
7
votes
2answers
1k views

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: ...
1
vote
1answer
293 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?
9
votes
3answers
6k 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 ...
2
votes
1answer
803 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
3k 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 ...
2
votes
2answers
2k 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 ../...
1
vote
1answer
160 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 ...
2
votes
2answers
263 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 working?...
0
votes
1answer
514 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 ...
2
votes
1answer
456 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 ...
1
vote
3answers
438 views

Maybe abuse of my server

I have a vps at hetzner.de with vmware running several instances, one of them is an Ubuntu server 13.10, primarily acting as mysql-server for several websites. Today I received an email from hetzner, ...
0
votes
1answer
1k views

why Ubuntu Firewall not showing verbose?

Even Ubuntu Firewall in running mode , I am not getting the data. may I know why ? root@ubuntu:~# sudo ufw status numbered Status: inactive root@ubuntu:~# service ufw start start: Job is already ...
2
votes
2answers
646 views

Am I under attack?

When I checked my log viewer, I noticed that ufw is blockng many ips that I'm not familiar with! I have only three computers in my local network at the time when I was checking my log viewer I was ...
4
votes
3answers
2k 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
2answers
680 views

How do I extract the source MAC from a [UFW BLOCK] entry?

I have the following UFW Block entry. How do I get the source MAC? I'm getting a ton from the same MAC=e8:11:32:cb:d9:42:54:04:a6:ba:22:f8:08:00 doing port scanning. If it matters, I'm using 12.04 LTS....
1
vote
0answers
211 views

Configuring ufw and iPredator VPN

I am running a VPN via IPredator on Ubuntu 12.04 Desktop, which works perfectly, when ufw is disabled. When I enable ufw, I logically cannot establish a connection. IPredator states that I have to ...
10
votes
2answers
9k views

how do you create an app profile for ufw?

Ufw has a command that lists out profiles to which you can further explore their profile definitions $ ufw app list And $ ufw app PROFILE {app profile title} I was wondering how you can create ...
1
vote
2answers
433 views

Access computer on internal network from Internet

My setup: Ubuntu 13.10 server with ufw, facing outside world on eth0, IP forwarding and masquerading working OK. Internal network 192.168.0/24 on eht1, no problem accessing the internet. I need to ...
2
votes
2answers
3k views

How do I whitelist some connections by ip from being dropped by connlimit?

I'm using these rules in /etc/ufw/before.rules # Limit to 20 concurrent connections on port 80 per IP -A ufw-before-input -p tcp --syn --dport 80 -m connlimit --connlimit-above 20 -j DROP -A ufw-...
0
votes
1answer
3k views

ubuntu server 12.04 and ufw failure on startup, and several module not found errors

I have problem enabling ufw on startup, it works fine if I do: sudo ufw enable. But after restart puf, I've to redo it. I tried: sudo /lib/ufw/ufw-init stop ; sudo /lib/ufw/ufw-init start And ...
1
vote
1answer
2k views

How to configure ufw on Ubuntu and still retain internet connection?

I am having trouble with how to configure ufw firewall for my Ubuntu 13.04 VPS server. Each time I enable the firewall, it closes all connections to the server. I need to open the following ports. I ...
0
votes
1answer
258 views

UFW blocks packets by the router, spams the log

While checking my systems logs I noticed this: Dec 30 19:45:24 Nick-Laptop kernel: [ 5324.288321] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:05:59:49:62:aa:08:00 SRC=192.168.2.1 DST=224.0.0.1 ...
2
votes
2answers
442 views

UFW and firewall

So I recently installed ubuntu and I have been working with it no problem.While browsing through the security guides (specifically: https://wiki.ubuntu.com/BasicSecurity) I noticed this: "enable the ...
0
votes
1answer
612 views

Are the Gufw default profiles empty?

I've just installed gufw on my notebook. I'm trying to setup my laptop with a very secure - roadwarrior - type of configuration. So the choices available in GUFW with a public, home and office profile ...
4
votes
2answers
2k views

Forward port to LXC guest using UFW

I am trying to forward port 2222 on my host 192.168.2.252 to a LXC guest on 10.0.3.11. How do I do it using the UFW-framework? In other words I want to do this but with the ufw-framework. iptables -...
0
votes
1answer
89 views

why opening a port is so difficult in ubuntu?

I have searched around and I have run these commands iptables -A INPUT -p tcp -d 0/0 -s 0/0 --dport 5432 -j ACCEPT iptables-save > /etc/iptables.rules And I rebooted the box. I had no luck. ...
0
votes
1answer
199 views

ufw before.rules file blank, does this impact setting up VPN server?

Hi all please assit i am trying to setup open-vpn following this link and currently having some issues. Easiest way to setup Ubuntu as a VPN server step 10 where I have to edit the ufw 10: This ...
4
votes
1answer
3k views

Ban IP by country in UFW

I want to block a country in my server, but I don't know which rule I must use in UFW (or iptables). For example, people from US and other countries can see the site, but visitors from Russia can't. ...
0
votes
1answer
2k views

UFW, allow from wlan to eth

I would like to use my ubuntu 12.04 notebook as a wifi hotsport to my smatphone. Everything is going ok, using dnsmasq and hostapd and allowing ports 68 and 53 on UFW. But to access the web the UFW ...
-3
votes
2answers
218 views

What documentation and help resources are available for setting and examining UFW rules? [closed]

The guy who wrote ufw is too smart for me. Is there any documentation for any of the python code? Some things I'm trying to do are: Allow/close ports by number Get the currently set rules Remove ...
0
votes
1answer
2k views

Connecting to NAT virtualbox guest from bridged network

I've setup a Virtualbox Ubuntu 12.04 server using Vagrant. I can ssh to it and even ping my desktop from it. What doesn't work is to ping the guest OS from my desktop. I've tried to flush the ...
3
votes
1answer
361 views

UFW python documentation

I'm trying to access ufw with python, but on line 53 of backend.py, they raise a weird error that makes no sense: Traceback (most recent call last): File "mymodule.py", line 1467, in <module>...
1
vote
1answer
438 views

How does ufw handle conflicting rules?

I recently had the following conflicting rules on ufw 445/tcp ALLOW 192.168.1.0/24 445 DENY anywhere 445 DENY anywhere IPV6 ...
2
votes
0answers
2k 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 ...
1
vote
0answers
145 views

Google Talk > Gufw set to Deny/Deny does BLOCK. Please help

I have my Ubuntu 12.04 Server. I installed Google Talk in it. I opened gufw, and set it to deny/deny and there are no allow rules. Now firefox wont connect to the internet which is good... But... ...
1
vote
0answers
677 views

UFW Firewall Rules, has a hole in it. Please help

Can someone please look at the below output for me. I have my UFW on deny/deny, and here are the rules. But if I leave my Ubuntu Server on, with a Windows XP VM, and let Instant Messenger run in the ...
1
vote
1answer
292 views

Problem: Ufw Enabled with Deny/Deny, however SSH Inbound still works. Please help

In order to lock down my server, i installed ubuntu with ufw. I run a VM inside the server that hosts a ssh server. I opened the server and ran UFW and set Deny to send and Deny to Recieve. Now it ...
0
votes
2answers
616 views

Litle question about ufw command

Hi guys i would like to setup a specific rule for my ufw but i have the problem. How could i type this ? from ip adress 192.168.1.203 on interface eth0 alow port 80 I have on local pc ip address ...
0
votes
1answer
122 views

GUFW for console?

I like the GUFW, but need something similar for console. I mean an interactive software without need to remember all the command line keys. Could you suggest one?
4
votes
2answers
4k views

Why is ufw logging 'BLOCK' messages regarding a port for which ufw is configured to 'ALLOW' connections?

Here's an example log message: May 25 10:36:07 myserver kernel: [7057243.392334] [UFW BLOCK] IN=eth0 OUT= MAC=00:02:55:67:82:eb:00:06:b1:3a:ef:62:08:00 SRC=69.197.128.26 DST=192.168.100.101 LEN=44 ...
1
vote
2answers
2k views

ufw firewall operation

I have always run the program UFW as my firewall in Ubuntu, and been satisifed with its performance. When I installed Ubuntu 13.04, and enabled ufw, I was not able to access the internet, and all ...
3
votes
1answer
6k views

How do I allow local IPv6 subnets in ufw?

I recently got IPv6 connectivity at home and now I would like to allow connections to my home server via IPv6 from the LAN only. The trick is that the IPv6 address/prefix assigned to the server is ...
2
votes
2answers
5k views

UFW 'default deny incoming' doesn't work

I have UFW enabled, 'default deny incoming' set and no any additional rules, but I still can access all ports from other PCs. I have to manually block each port. What can be wrong?
7
votes
2answers
10k views

What could be the cause for these strange UFW block entries in my syslog?

I've recently noticed a large number of recurring UFW blocks in my syslog. This surprised me as I have no UFW rules set: $ sudo ufw status verbose Status: active Logging: on (low) Default: deny (...