Uncomplicated Firewall (ufw)

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How can I speed up my 103 sec boot time(dmesg output included)?

I was hoping that people might have suggestions as to how I can speed up my boot time. At the moment, as you can see below, it's taking all of 103 seconds. I have noticed a few bottlenecks at around ...
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Firewall not starting on system startup

I have enable firewall using sudo ufw enable. But when i restart system, it is getting disabled. I checked /etc/ufw/ufw.conf and it has ENABLED=yes. Here is system config $ uname -a Linux master ...
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Block HTTPS site

Can anyone recommend an effective tool to block some https websites with ubuntu server? I want to use the server as a gateway for the users. A detailed guide would be highly appreciated. Thanks
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UFW ACCEPT Problem

I'm having problem with UFW. If i block like whole /24 network becouse lots of bruteforcing etc. coming from China / Korea or somewhere. They still get to open ports. If i have, lets say port 443 ...
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15 views

Unable to add firewall rule “Duplicate Profile”

I'm unable to add new rules to my firewall using ufw gui. In the Log I get the following error. [19/01/16 14:16:43] Error running: /usr/sbin/ufw allow in from any to any port 8000 > WARN: ...
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29 views

OpenVPN Configuration with ufw eth0 doesn't exist to add it in before.rules

in this guide I am asked to edit /etc/ufw/before.rules and add: # START OPENVPN RULES # NAT table rules *nat :POSTROUTING ACCEPT [0:0] # Allow traffic from OpenVPN client to eth0 -A POSTROUTING -s ...
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44 views

How does ufw filter traffic?

I enabled ufw firewall with the following command: $ sudo ufw enable Firewall is active and enabled on system startup $ Now while I look at the status: $ sudo ufw status verbose Status: active ...
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25 views

Would active connections cause this UFW Block?

I'm running ubuntu 14.04 as a gateway, routing is controlled by iptables. I'm getting a number of strange blocks in UFW which seem to effect established connections. Is there any way this block would ...
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ufw, wifi, ethernet and the access to my computer

Hello everybody and thank you for your help in advance. My problem is as follows. I have installed kmotion, webadmin and of course apache in my laptop. I have opened ports 80, 8085 and 10000 ir order ...
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55 views

How to make room in /var/log partition

Tracking ubuntu 14.04.3 firewall info I enabled ufw full login for a while (now turned back off). Now I'm warned I run out of space in the /var partition. Looking there in I find 3 huge files: ...
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56 views

UFW is not logging (port scan with nmap)

This is the output of sudo ufw status verbose: Status: active Logging: on (low) Default: deny (incoming), deny (outgoing) New profiles: skip To Action From -- ...
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37 views

Do I need iptables or ufw if I have gufw?

On my Ubuntu computer I have Iptables,ufw and gufw installed on it but I am trying to figure out if I need to remove one so I did a experiment and removed iptables and I saw ufw and gufw was removed ...
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36 views

Why does Ubuntu comes with two firewalls by default?

I just realised Ubuntu comes with two firewalls by default iptables and ufw. But why? I mean running more than one software firewall on one computer can be insecure, that's what they say. I don't ...
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18 views

Filtering between 2 sub-networks with UFW?

On my server I have set-up 2 networks (eth1:172.16.1.0/24 and eth2:172.16.2.0/24) which should both communicate to the internet (interface eth0). Thus the server does the masquerading with ufw. ...
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29 views

External connections to website are blocked

I have a fresh install of Ubuntu server and am just trying to host a website on port 9999. My router is correctly forwarding the port to the hosting machine and I have set ufw to allow TCP on port ...
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58 views

UFW is blocking “gvfsd-smb-browse” on changing ports

I have a problem connecting to the samba shares between two of my computers. One is a Laptop and the other a Destop-PC, both running Ubuntu-Gnome 15.10. It changes from which Computer I can connect to ...
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44 views

How to debug connection issues caused by ufw/iptables?

My current ufw setup is causing problems, specifically with git, and I suspect this will not be the last time it causes connection problems. What should be the debug procedure to understand ...
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202 views

How to configure UFW to allow ntp to work?

I've enabled UFW on one of production servers with configuration: Default: deny (incoming), deny (outgoing). For NTP synchronization, I've installed ntp and it's currently running. Can someone advise ...
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64 views

Forward only web traffic to another interface

My Ubuntu server has two interfaces. 1) Public - eth0 2) Internal - eth1 How can I forward web traffic (port 80) to nginx running on eth1 from Public interface eth0 ? I don't know exact ufw ...
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33 views

Hamachi is able to ignore firewall

Hello I recently installed Hamachi and Haguichi. I created a network and my friend joined. So I hosted a game and the port was 1100, I think, but the problem is that he was able to join althrough I ...
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24 views

ufw not securing ports

I have configured ufw in the manner below. What is puzzling is ports that I have instructed to block both outbound an inbound are connected. Why? My current ufw configuration vs. open port via ss ...
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Will this UFW Config keep all non-lan traffic on the VPN?

I use PIA VPN as an always on VPN for my ubuntu box. I want all the traffic to go through the VPN, and no internet activity anywhere else. I also want to keep local LAN access to/from my ubuntu box. ...
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43 views

How to disable UFW ubuntu externally?

i am using amazon EC2, i enabled UFW in my server and without adding any other rule i logged out. now since there was no rule specified, i am not able to login to ssh and because of it even my website ...
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51 views

Putty not letting me to login to ubuntu remote server?

I am using amazon ec2 instance for one of my products and i am stuck with a very big problem. I am new to server and was just looking to configure UFW for only my ipaddress and i updated a rule for it ...
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67 views

What's the purpose of economy.canonical.com?

I noticed that in one of my server's /var/log/ufw.log this morning that the firewall had blocked the IP address 91.189.91.23 from accessing port 80. This occurred 9 times within about a minute and a ...
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65 views

How to configure ufw to allow xsane to reach scanner?

I could not find any clear answer through prior research. Xsane fails to find the scanner with ufw enabled, works great with ufw off. I have opened 6566 for both tcp and udp in ufw. Still no joy. ...
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Some SSL web sites stop responding, while others continue to function

Does anyone have ideas on how to debug my problem. I have sites that are using dedicated IPs with secure certificates from comodo, and other sites using startssl certificates. Under unknown ...
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68 views

What Ports do I need to keep open to access my SSH Server with non-default Port

I'm not using Port 22 for my SSH but something above 47000 I have ufw (uncomplicated firewall) installed and have unblocked "ssh" and "http" When I look into the current ufw status he says that Port ...
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57 views

Is Uncomplicated FireWall (ufw) a service?

I am currently studying iptables and ufw on ubuntu server. While playing with them I came across an ambiguity about the true nature of the ufw. Here is the problem: When I run sudo ufw status in ...
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41 views

Gufw is running, but no ufw process running. Normal?

Gufw is protrayed as a front-end to ufw, but when Gufw is running, I don't see ufw running. When run ps -ef | grep ufw, should it report processes for both ufw and gufw, or would we only see gufw if ...
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240 views

UFW Firewall GUI

Im on Ubuntu Vivid 15.04. I have UFW enable. I need some GUI to manage it. Does anyone know or ever use UFW firewall GUI?
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Will enabling ufw through ssh disrupt current session?

I have an ubuntu server that I access through SSH. I've changed standart port (22) to something else. I want to enable ufw on this machine. However, I'm afraid of the possibility of the following ...
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ufw not working anymore

This morning I needed to do some firewall tweaks on my machine (Ubuntu 14.04 LTS; Mac Mini). After running ufw status verbose, the following errors were shown: Traceback (most recent call last): ...
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ufw: allow connection to the firewall itself?

If I understand ufw (Uncomplicated Firewall) the right way, then commands like ufw allow in on eth0 to any port 80 allows connections from eth0 to any other network interfaces and to the firewall ...
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136 views

ufw allow port from ip address range and deny others

I'm using Ubuntu 14.04.3 LTS root@alexus:~# ufw status verbose Status: active Logging: on (low) Default: deny (incoming), allow (outgoing), deny (routed) New profiles: skip To ...
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90 views

Inter container network communication blocked in docker

I am starting with docker and I have decided to spin up my gitlab instance in a container as well as gitlab-ci-multi-runner to perform my CI builts (just to test the possibilities of the flow). ...
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Command substitution using grep'ed and sed'ed tail -f output as argument source into 'at' command

This is for a home surveillance system, headless server running Ubuntu 15.04, and I want its security to be exemplary. I envision a command line solution (with optional script, if absolutely ...
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27 views

Is sed the way to extract a number which is to become part of a command line being constructed?

In /etc/knockd.conf I want a command that will be a ufw insert [line number]... command, the line number is dynamic and can be gotten from finding the first ALLOW occurrence in the ufw status numbered ...
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SNORT - configuration to use it with VPN

my all network traffic goes trough VPN. Status of ufw: Default: deny (incoming), deny (outgoing), disabled (routed)/ ALLOW OUT Anywhere on tun0. snort.conf - http://pastebin.com/rvyYcCke ...
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Unable to browse when on VPN (OpenVPN) and UFW in place

I have set up an OpenVPN server using a script. I have set up the following UFW rules: 22 ALLOW IN Anywhere 1194/udp ALLOW IN Anywhere 22 (v6) ...
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99 views

Why cannot allow/deny specific software in ufw Linux?

Why cannot allow specific software (like Firefox) to use internet but deny other software (link Chrome) that are using same port in ufw? In windows there is the feature, why ufw don't have that?
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ping localhost: socket: Permission denied

I messed something up and pinging any hostname gives me "unknown host", and pinging localhost or 127.0.0.1 gives me "socket: Permission denied", even on root. Connecting to the machine (ssh/openvpn) ...
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234 views

ufw not working in an lxc container

I've created an LXC container on Ubuntu Server 14.04.1 using the default template. I log into it, and run the following: sudo apt-get update sudo apt-get install ufw sudo ufw allow 22 At this ...
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1k views

Port forwarding with UFW

I realize UFW is mainly just for enabling/disabling access on particular ports, but I'm trying to forward one port to another. I want any connection to port 1724 to be forwarded to 1723. The file ...
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1answer
88 views

Check existing ufw firewall rules without enabling it

I'm using Vagrant to run an Ubuntu 12.04 LTS box. $ sudo ufw enable Command may disrupt existing ssh connections. Proceed with operation (y|n)? Obviously, I don't want to disrupt my SSH connection ...
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104 views

IPTables/UFW not allowing incoming connection

I have two Ubuntu 14.04 virtual servers. One has IPTables/UFW on and enabled. It also has Vesta Control Panel installed. The other server is running some gaming servers, it does not have iptables ...
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76 views

Port 22 is always open

I configured a new Ubuntu Installation and set up the firewall. All incoming was denied and all outgoing was denied as well(with exception for port 8080, as I am behind a proxy). I then tried an ...
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54 views

Configuring strong firewall rules

How to configure strong firewall settings via ufw? All inbound settings set to deny and only specific outbound ports to be allowed. Will the following be good enough? ...
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119 views

How to find port of a network scanner for UFW

Samsung multi-functional device SXC 3205w works perfectly with my Ubuntu 12.04 and I can scan and print over network, but only when firewall is disabled. How can I find out which port to enable in ...
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Ubuntu noob, problem with IP masquerading; “Error saving the document ufw”?

I'm a noob and I'm used to the limited version of Ubuntu offered on TAILS, never did anything really technical with it, so i'm a complete noob here. I installed Ubuntu on my laptop. I have an UFW ...