All Questions
19
questions
0
votes
0
answers
486
views
No internet access without VPN after updating from 18.04 to 20.04
After updating to Ubuntu 20.04 LTS internet stopped working without VPN (I use Cloudflare WARP)
righthaze@desktop ~ ping google.com
PING google.com (216.58.215.110) 56(84) bytes of data.
ping: ...
2
votes
0
answers
158
views
ZMQ ZAP connection problem in ubuntu server 18.04
I'm using python and ZMQ to publish and subscribe data through a TCP network connection. I tried to connect in normal mode (without ZAP) and ZAP mode which is an authentication protocol.
I've tried it ...
0
votes
1
answer
8k
views
Use `ufw` to access localhost:port (mobile development)
I was hoping to use ufw command to modify rules and allow connection over the wifi network to localhost8080 on my ubuntu 18.4 OS. Then I figured I'd be able to use the address (192.168..:8080) to ...
- 43
1
vote
1
answer
1k
views
UFW not blocking traffic to microk8s cluster
I successfully deployed k8s pod with service of type NodePort in microk8s cluster. Now when I enable ufw and try to deny incoming traffic to the exposed port 31001 using command ```ufw deny 31001``` , ...
1
vote
0
answers
3k
views
Port opened with ufw shown closed by nmap
I need to open port 465 on my PC. I ran the following succesfully.
root@user:/home/user# ufw allow 465
Rule added
Rule added (v6)
But when I scan with nmap. I get-
root@user:/home/user# nmap -p465 ...
0
votes
1
answer
103
views
Cannot connect to Ubuntu LTS from another network
I'm using Ubuntu 18.04.3 LTS on VirtualBox (Windows) with DHCP ip configuration. In other words, I haven't configured anything. Well, I HAVE updated all packages and installed ssh server and midnight ...
- 5
1
vote
0
answers
2k
views
How to block localhost from ufw
im already tried
sudo ufw deny proto tcp from 127.0.0.1 to 127.0.0.1 port 80,443,3306
but when i start /opt/lampp/lampp start and refresh localhost it's still work
1
vote
2
answers
1k
views
ubuntu 18.04 torrent seeding problem
I wanted to get my firewall working, and I used:
sudo ufw enable
after that my torrent client stopped seeding, my /ets/nginx folder disappeared and I actually don't even know what happened... so I ...
- 33
3
votes
1
answer
5k
views
Adding manual iptables rules to UFW
I have a use case that needs iptables' ability to restrict a rule to a group id (--gid-owner). Ufw doesn't have support for this in its rule syntax.
From my experiments and reading online (e.g. UFW ...
- 131
3
votes
1
answer
2k
views
iptables owner module not found - match error "No chain/target/match by that name"
This is a fresh copy of ubuntu on my nVidia Jetson Nano, and I am trying to add the following rule to block network access for user 1001.
sudo iptables -A OUTPUT ! -o lo -m owner --uid-owner 1001 -j ...
- 11.3k
1
vote
1
answer
460
views
Make ufw follow iptable rules
I have a bunch of configuration in ufw that I want to avoid porting to iptables (unless there is a easy way to export from ufw and import in iptables). Simplicity of ufw etc. being the reason.
Now I ...
- 385
0
votes
1
answer
1k
views
iptables rules applied multiple times
I had a very simple set of iptables rules on a newly installed system:
$ sudo iptables -L
Chain INPUT (policy DROP)
target prot opt source destination
ACCEPT all -- ...
- 285
9
votes
10
answers
38k
views
Ubuntu 18.04 Login window loop
Is there any reason the login window would stop working and start looping? I'm running 18.04. I normally RDP into the ubuntu box, but that isn't working now. Using a keyboard and mouse, I see my ...
- 301
0
votes
1
answer
2k
views
Block Webpage Using Firewalld
I am trying to get my firewalld to block an ip address with the rules:
sudo firewall-cmd --zone=block --add-source=<ip_address/submask> --permanent, and also adding this richrule to the default ...
- 36.9k
1
vote
0
answers
1k
views
Cannot telnet port 80 remotely, nginx
MY problem is:
I can telnet to port 80 locally, but not from another computer.
The following is what I did:
Disable firewall.
$ufw disable
Execute the following command:
$netstat -tlpn |grep ...
- 11
1
vote
1
answer
2k
views
Postfiix startup issue ubuntu server after upgrade to 18.04
What started as a suspected internet issue now looks like an issue with postfix
Hopefully someone can help me fix?
I seem to be having some random connection issues with my amazon AWS I upgraded 2 ...
- 142
15
votes
1
answer
6k
views
UFW Allows 22 for IPv4 and IPv6 but SSH Disconnects When Enabling
sudo ufw disable followed by sudo ufw enable kicks me out of SSH
DMESG reports
[UFW BLOCK] IN=eth0 OUT= MAC=30:........ SRC=192.168.1.me DST=192.168.1.server LEN=52 TOS=0x00 PREC=0x00 TTL=128 ID=...
- 921
0
votes
2
answers
4k
views
DNS Resolution fails with UFW & OpenVPN (ProtonVPN Server)
I have an issue I've been trying to solve for a few days now - I'm working on a relatively fresh installation of Ubuntu 18.04, I enabled UFW and configured it with the following rules.
sudo ufw ...
- 1
0
votes
1
answer
2k
views
18.04 VPN & UFW firewall issue
Went from 16.04, connecting to VPN fine through Network Manager on Xenial. Under 18.04 it doesn't connect, settings are unchanged. Get the grey icon which vanishes after 10 seconds. I've tried the '...
- 649