Uncomplicated Firewall (ufw)

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1answer
163 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: ...
2
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1answer
231 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 ...
2
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1answer
241 views

Using Ubuntu as a gateway for monitoring and possibly IPS IDS within Active Directory

Ok, I've searched for days, maybe you can point me in the right direction. I have an MPLS scenario with a shared gateway in a multi-domain M$FT AD environment. On the inside of the MPLS all of the ...
1
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1answer
86 views

Configuring NAT with ufw instead iptables

I want to apply this iptables rule: iptables -t nat -A PREROUTING -d 87.13.180.182 -j DNAT --to-destination 192.168.0.13 (87blabla is my public ip and 192blabla is my private ip). People ...
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1answer
423 views

UFW Ctrl-C and iptables: Chain already exists

I did a dumb thing, so bear with me. While running a ufw command to add a rule, I did a Ctrl-C, this led to the problem of the following error being generated every time I try to use UFW: ERROR: ...
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1answer
142 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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1answer
110 views

How to add a rule for loggin packets in ufw

I'm seeing a lot of connections with source 0.0.0.0 and destination 0.0.0.0 in conntrack. I want to log these packets which have source 0.0.0.0 and destination 0.0.0.0 so that I can digg this issue ...
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1answer
57 views

No UFW logs at syslog

I'm using here the UFW as a basic protection. When I'm using the wi-fi from the college I get some UFW block (which is normal, because the firewall is ON). But strangely, I'm not getting any UFW logs ...
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21 views

Configure UFW to allow only established and related conections (on IPv4)

I want to configure ufw to deny everything except the related and established connections. On iptables I usually did : -P INPUT DROP -P FORWARD DROP -P OUTPUT ACCEPT -A INPUT -m state ...
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87 views

ubuntu server 14.04 port 21 keeps closing

I have got a problem with port 21, which keep closing. I am using proftp and ufw and set port 21 to internal network only. This works fine, however, after a few hours or days (not sure on time ...
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150 views

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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1answer
193 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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0answers
424 views

What do these lines in the UFW logfile mean?

These lines are repeated several times, first one at the time when remote ssh connection with the machine is lost (mac address is the address of eth used for Internet connection) Mar 24 21:20:32 ...
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971 views

Why is UFW blocking outgoing connections?

UFW is blocking some outgoing connections on my server, such as Akismet, the spam killing plugin for my Wordpress site. According to Akismet's firewall info I need to allow contact with four IPs. My ...
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309 views

Why does UFW seem to slow down wordpress?

I have a speedy install of wordpress going on ubuntu 12.04. Everytime i enable the UFW firewall, things can get really slow. Sometimes fast, sometimes slow, intermittently. Logging on through ssh ...
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41 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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32 views

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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2k views

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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58 views

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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37 views

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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234 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 ...
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751 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 ...
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97 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 ...
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154 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 ...
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250 views

Unable to bridge using OpenVPN on Ubuntu 12.04 Server

I set up an Ubuntu Server 12.04 LTS in my LAN and forwarded tcp port 1194 to it. OpenVPN-Server is running, the Client (Ubuntu 12.04 LTS) can connect. Device tap0 is visible on client: tap0 ...
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1k 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 ...
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125 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... ...
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497 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 ...
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16 views

ufw on ubuntu doesn't work, how to deactivate plesk firewall?

Since I'm a totally newbie to server stuff but I needed to set up a vServer, I let install Ubuntu 14.04 AND Parallels Plesk on it. Now, I think it would have been better to install Ubuntu without ...
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24 views

After I installed UFW ssh login very slow

I'm wondering if I made a mistake or if this is the normal case. I turned off password based ssh login and changed it to RSA key exchange. After that I changed the ssh port and then I installed UFW. I ...
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40 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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32 views

SSH UFW: ERROR: Could not find a profile matching 'ssh'

I am installing a new server. I am using ssh to connect but when I try to install ufw and allowing ssh: sudo ufw allow ssh I get ERROR: Could not find a profile matching `ssh` It is kind of ...
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31 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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97 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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62 views

KVM client only has internet with ufw disabled

I have just installed a client OS (Windows 7) using libvirt and everything is fine. I have bridged an interface (br0) for my guest OS and I can ping my entire local network but I don't have internet ...
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37 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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44 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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24 views

Using ufw as a firewall between network segments

I've been using Ubuntu server 12.04 as a router and it worked. Now I'm trying to add some security using ufw. I enabled the ipv4-forwarding feature in the configuration file and added a rule ...
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44 views

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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68 views

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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23 views

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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116 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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26 views

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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170 views

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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160 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 ...
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240 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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88 views

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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95 views

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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166 views

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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62 views

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 ...