All Questions
166
questions
0
votes
1
answer
141
views
IPTables rules and networking with problems
I'm using a Fritzbox for normal network and an own installed Router on rpi3 for an own network with openvpn, dnsmasq and iptables. Over the last few years the setup worked good. You can find the ...
- 11
2
votes
2
answers
3k
views
configure iptables to block all(as much as possible) bittorrent traffic
good day all
This is my current iptables setup
# Generated by iptables-save v1.4.7 on Wed Apr 9 13:50:31 2014
*filter :INPUT DROP [0:0] :FORWARD DROP [0:0] :OUTPUT ACCEPT [0:0] :LOGDROP - [0:0]
-...
CommunityBot
- 1
1
vote
0
answers
91
views
Reroute and tunnel udp connection to another server
I have been trying to establish a connection between a vps and a dedicated bare metal server for a month now. Basically, vps will act as a tunnel to connect to my dedicated server, I'm doing this to ...
1
vote
1
answer
881
views
iptables - How do I restrict access to just local devices on the network?
I have a WireGuard VPN Server running on a Debian 12 host with no problems, listening on a specific UDP port, and all is working great with no issues. I can connect from my phone WireGuard client ...
- 465k
1
vote
0
answers
378
views
Unable to traceroute but able to ping
I need to connect to my own server that runs Linux Mint.
After installing Tailscale on both PCs (client and server) I can successfully ping the server from client, but I'm unable to traceroute it.
...
- 56.1k
4
votes
1
answer
2k
views
nftables: How to stop further chain traversal after accept verdict
Context : https://wiki.nftables.org/wiki-nftables/index.php/Configuring_chains
If a packet is accepted and there is another chain, bearing the same hook type and with a later priority, then the packet ...
1
vote
0
answers
144
views
Kali Linux takes way too long to load the GUI after entering the password? IPTABLES
After entering the passward to login, it takes way too long to load GUI.
I think the issue is with the firewall, when I enable it the GUI loads way two long to load. More than a minute, if it's ...
- 7,360
0
votes
1
answer
336
views
How to send back TCP packets using iptables
I am trying to demonstrate TCP communication with a Ubuntu 18.04 box (which mocks a QNX setup) that does not have a listener installed. Consider that due to some license issues it might not be ...
- 8,457
0
votes
2
answers
5k
views
limit max UDP bandwidth per IP using iptables?
'm using a VPS to host a VPN for DDoS protection, but I've been wanting to find a way to rate-limit UDP traffic per IP to prevent UDP floods. I'm looking for something to only allow X MBPS of traffic ...
- 1
2
votes
2
answers
1k
views
Change all rules in iptables when changing IP address
I have a network gateway system using iptables to allow/deny traffic to/from an internal network. I have to manually add and remove rules in iptables depending on the requirements of the entities in ...
- 3,667
0
votes
1
answer
601
views
iptables ESTABLISHED,RELATED in combination with DNS rules
I'm reading Chapter 3 in "Cybersecurity for Small Networks" (Seth Enoka) and have added the following iptables rules in an Ubuntu 22.04.1 virtual machine:
# Generated by iptables-save v1.8.7 ...
- 465k
4
votes
3
answers
1k
views
Is this firewall completely secure?
I'd like to know if there's any holes/flaws in this firewall setup. I want to lock down the server as much as possible so it is impossible to hack in to. The only services running are openvpn and ssh. ...
- 265
0
votes
1
answer
3k
views
IPTables issue allowing queries to DNS server
I've been given a task to create a DNS server for a subdomain with a delegated DNS zone. I did test the zone file and using the dig tool, I can confirm it is working when called for localhost and the ...
- 1,238
0
votes
1
answer
547
views
How to setup firewall rules to allow whitelisted IP for communication over eth0
I have to setup firewall rules for my onboard network(for list of device which are connected via eth0 interface) during boot up of Linux device.
By default all communication over eth0 should be ...
1
vote
0
answers
342
views
iptables forwarding stops working after suspending or rebooting
I am trying to forward packets received by a PC on port 16080 to port 3389 to another PC connected to it via Ethernet, where enp1s0 is the Ethernet interface and 10.42.0.66 is the IP of the connected ...
