Uncomplicated Firewall (ufw)
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32 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 ...
2
votes
1answer
30 views
How do I allow local 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 ...
0
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1answer
91 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?
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0answers
21 views
Allow hotspot service to run on Precise without compromising the firewall?
Well, I've been using Ubuntu 12.04 LTS for a while now, and for my own sanity and security, I've configured my ufw firewall to deny all incoming, and for outgoing just allow these ports:
TCP 80, 443 ...
1
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1answer
117 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 ...
0
votes
1answer
117 views
How do I configure ufw to only allow outgoing/established connections for a IPv6 network?
How do I configure ufw to only allow outgoing/established connections for a IPv6 network?
I am using an old computer with 12.04 installed to create an IPv6 router for my local network. I would like ...
1
vote
1answer
151 views
Setup firewall: ask user to allow new incoming/outgoing traffic?
I'm using Ubuntu 12.10 and as I know there is already a firewall on any ubuntu system. It's ufw and because I like fancy gui stuff I can use gufw, that's very nice.
Now I would like to configure this ...
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0answers
40 views
gufw set to “deny incoming” and “deny outgoing” still allows me to use internet with browser, what gives?
I've been trying to setup gufw. I would have thought that if I denied outgoing and incoming I should not be able to do anything outside of my local computer... but I still can use the internet, etc. ...
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0answers
131 views
Make sure torrents only transfer over openVPN with iptables or ufw
My set up:
Headless Ubuntu server 12.04 in a virtualbox, deluge and openVPN. The problem is that if the VPN goes down deluge will continue over my normal connection, this should not be possible.
I ...
4
votes
1answer
126 views
Can I uninstall UFW completely?
I need to configure iptables manually and save and restore the rules using iptables-persistent package. so I don't want ufw anymore.
I can simply disable it. but many chains are exists in iptables ...
2
votes
2answers
53 views
How can I cancel all the current communication from particular IP in Ubuntu 12.04?
I am working on Ubuntu 12.04 firewall. I want to deny any IP on runtime. I am using "ufw deny from IP". It's working for future connections. But it is not cancelling the existing connections like ssh.
...
3
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0answers
97 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 ...
4
votes
2answers
97 views
Is it possible to block a webpage using ufw?
basically I have two machines X and Y.
I want to block "http:// <IP-of-Y-Here> /AFolder/" from machine X on HTTP port 80 using ufw.
Trivially, this can be completed (awfully) using ufw ...
0
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0answers
66 views
Alter iptables on disabling UFW
I already added a rule on nat table in /etc/ufw/before.rules :
*nat
# masquerade rule for virtual box guests
-A POSTROUTING -s 192.168.56.0/24 -j MASQUERADE
COMMIT
after running:
root@parsoon:~# ...
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0answers
70 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 ...
2
votes
2answers
178 views
firewall ufw is “enable and active” but gufw is off
question concerning the ufw firewall :
sudo ufw enable
returns
Firewall is active and enabled on system startup
sounds fine, but when i start gufw after reboot, it is still off
what does that ...
0
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0answers
58 views
How can I turn off ufw blocking nodes
I have set up ufw on a couple of servers and allowed every connection between those servers since the need to communicate with each other without any restriction.
Now, ufw sometimes blocks connection ...
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0answers
20 views
issue now fixed…ufw wont at boot up or at all even after sudo enable command
very new to ubuntu, very impressed so far apart from problem with ufw.
ive installed and uninstalled ufw a variety of times.
ive tried the sudo enable command and it still wont run on bootup or at ...
0
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0answers
250 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 ...
0
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0answers
92 views
Setup of UFW (Uncomplicated Firewall) on network that contains proxy
Trying to make a proper setup for UFW (Uncomplicated Firewall). I have network that's behind proxy.
Setup I need it that some of the network computers have to be able to browse everywhere, and
some ...
0
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0answers
32 views
UFW blocked laptop keygen?
I had a puttygen key set up and working on my laptop for a linux server, i got the laptop set up a lot better and the key still worked, i then updated linux server and did a scan on the laptop where ...
1
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1answer
79 views
User to access only to specific IP addresses
How can I setup Ubuntu box so logged user can access only to several IP addresses, on all protocols?
Additional problem is that Ubuntu uses proxy to acceess to internet.
Tried with UFW, but did not ...
0
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0answers
634 views
UFW port forwarding
I use UFW and here is my setup:
eth0 is configured as a bridge interface (br0):
inet adr:10.0.4.10 Bcast:10.0.4.255 Mask:255.255.255.0
eth2 is connected to a private network:
inet ...
1
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0answers
183 views
Firewall stopped and disabled on system startup ERROR: problem running ufw-init
I am trying to set a VPN server on my PC (Ubuntu). I am following a tutorial , http://cviorel.easyblog.ro/2009/02/09/how-to-set-up-a-vpn-server-on-ubuntu/.
I made changes in various files including ...
0
votes
1answer
155 views
Can't open a port
I need to run an app on my computer which connects to local port 49100. So everything runs on one computer.
I tried adding rules to gufw, firestarter, manually:
sudo iptables -A INPUT -p tcp --dport ...
1
vote
1answer
777 views
Regarding ufw firewall
I am using Gproxy software in my computer(Ubuntu 12.10). I want to allow incoming connection from only one IP adress,so that he can use internet. what settings should I configure in ufw firewall.
1
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0answers
84 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 ...
0
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0answers
116 views
ufw firewall port deny access
I installed red5(version 0_9_1) on my Ubuntu 12.04 server and I use ufw firewall.
I want just an ip address to connect to port 5080 and protocol rtmp to see my flv movie.
for test I have allowed IP1 ...
1
vote
1answer
232 views
ufw configuration nat ppp0
please some tips how i can allow this request in ufw:
[UFW BLOCK] IN=ppp0 OUT=eth0 MAC= SRC=10.11.22.2 DST=8.8.4.4 LEN=71 TOS=0x00 PREC=0x00 TTL=127 ID=52 PROTO=UDP SPT=59405 DPT=53 LEN=51
i tried ...
1
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0answers
167 views
Ubuntu all versions from 10.04 till 12.10 [closed]
Is simply enabling the firewall ufw (sudo ufw enable) sufficient enough for protection of the OS ? I mean should extra rules be added for 'better' protection, or is simply enabling the firewall enough ...
1
vote
1answer
248 views
UFW not allowing Transmission to transfer
I have set the rules in ufw for Transmission but when I try to use it it will not transfer and it also says the port is closed when checked under preferences.
If I turn the UFW firewall off it still ...
0
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0answers
760 views
IP forwarding not working in Ubuntu 12.04 Server
I'm having trouble getting IP forwarding going in Ubuntu 12.04 server with UFW. I'm trying to get OpenVPN working. I have two interfaces, eth0 and tun0, and they can't ping each other.
I've made the ...
0
votes
1answer
683 views
Port listening on localhost:8000 but not on ip:8000
Hello I'm running a web application on port 8000. When I access it from the host server localhost:8000 it responds ok, 127.0.0.1:8000 also works, but 192.168.1.7:8000 does not work. 192.168.1.7 is the ...
1
vote
1answer
2k views
Why I'm getting this [UFW BLOCK] in my syslogs?
I wonder why I get this error on my syslogs:
[7732763.396193] [UFW BLOCK] IN=eth0 OUT= MAC=02:8b:1a:75:d5:7b:02:8b:1a:40:00:03:08:00 SRC=x.x.x.x DST=x.x.x.x LEN=40 TOS=0x00 PREC=0x00 TTL=64 ID=53703 ...
0
votes
1answer
352 views
Best & The Most Secure UFW Configurations? [closed]
I've looked in these two (1 & 2) Qs&As but didn't find an accurate and simple answer...
I'm on a variant of Ubuntu 10.04 and I want to configure my firewall in a way that it couldn't be ...
1
vote
1answer
426 views
How do I configure ufw to allow ssh on another port? [closed]
I'm having some difficulties at the moment with my Ubuntu SSH server. The only title I could come up with summarizing my situation was too long so here is my problem:
I recently discovered the ...
1
vote
1answer
2k views
How to configure UFW to allow IP Forwarding?
I have UFW, OpenVPN and Virtualbox installed on my home server. I have a host-only network for my virtual machine guests (vboxnet0) set up with the IP range 10.0.1.0, and another IP range of 10.0.0.0 ...
6
votes
1answer
531 views
Block Ping from a specific IP
I am on a private LAN 192.168.1.0/24. My ip is 192.168.1.3, I want to block only ping requests from 192.168.1.2.
I am running ubuntu 11.10. I found two links
First tells how to block an IP but not ...
3
votes
2answers
368 views
If I enable ufw, and disable ssh. Is my base install Ubuntu 12.04 safe from the outside world?
I installed Ubuntu 12.04
I then installed Gufw, enabled it and Set every known application setting to "Deny".
I never installed sshdaemon so I think its off.
My machine still responds to pings... ...
0
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0answers
38 views
How do I tell Log File Viewer not to log something?
Log File Viewer keeps logging blocked ICMP connections and filling up my ufw log. How do I tell it to not log certain ICMP blocked connections?
1
vote
1answer
711 views
Windows VirtualBox can't browse network
I'm running Windows XP as a VirtualBox guest OS under Ubuntu 11.10, and I can't browse the Windows network. It seems like I can connect to some specific network shares, maybe only ones that are ...
2
votes
1answer
4k views
How do I allow all possible IPs for Gmail servers through my ufw firewall?
I am currently using the following rule:
ufw allow out from my_local_ip to any port 587
This is a little too lax for my liking. I would like to tighten it up and restrict it to only gmail's smtp ...
0
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0answers
351 views
Open port in gufw is closed, no incoming connection on deluge
I have a problem configuring gufw. I open ports on it, but when i test in deluge it shows as closed. Any help on setting up the firewall would be greatly appreciated. This is the output I get on the ...
6
votes
2answers
2k views
What do UFW's audit log entries mean?
I'm sometimes getting a lot of these AUDIT log entries in
...
[UFW AUDIT] IN= OUT=eth0 SRC=176.58.105.134 DST=194.238.48.2 LEN=76 TOS=0x10 PREC=0x00 TTL=64 ID=32137 DF PROTO=UDP SPT=36231 DPT=123 ...
1
vote
1answer
65 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 ...
2
votes
1answer
840 views
How to set an NFS network between my two Ubuntu PCs?
I want to merge information found here and there in order to record in one answer all steps to set my NFS network between my too Ubuntu PCs.
This is useful time to time, for example after Ubuntu ...
1
vote
0answers
997 views
UFW Settings - Application Integration [closed]
I have installed the Ubuntu system, and deny both incoming and outgoing ports loosing internet access.
Now I want access only for my Firefox that I have installed separately from the Firefox website ...
2
votes
2answers
5k views
What are ICMP redirects and should they be blocked?
After enabling ufw and the Tiger security auditor, I see warnings saying:
The system accepts ICMP redirection messages
What are ICMP redirection messages? Should they be disabled for security ...
2
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0answers
501 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 ...
2
votes
0answers
422 views
UFW give errors and won't auto start at boot [closed]
I just tried to enable ufw on my server, it gave me this error :
ERROR: problem running ufw-init
When I tried the second time, it worked.
When I tried to set the default rule "sudo ufw default ...
