All Questions
166
questions
1
vote
1
answer
1k
views
With iptables only allow certain outbound ports
Okay, I'm running a router with shibby tomato (linux based) v1.28-115 and have a bridge network setup (br1) that consists of a guest wifi.
I want to only allow access to specific outbound ports... ...
- 863
1
vote
1
answer
892
views
ICMP firewall policy for standard ubuntu desktop
For a standard desktop computer running Ubuntu 12.04 behind a NAT router, what ICMP packets should one accept in the firewall, say iptables?
It seems there is often conflicting advice; some say block ...
- 379
1
vote
2
answers
3k
views
IPtables Rules to Block IP Range
I've applied the following rules from a text file called "iptables.save" to iptables.
But to my dismay, I found that the ip address 107.22.26.176 is still able to access my server via TCP.
What did ...
- 337
1
vote
2
answers
7k
views
UDP packet and firewall
I notice when I send udp packets from computer A to computer B,
B can receive the upd packets correctly
but if I send udp packets from computer B to computer A
the udp packets are not received
A and ...
- 111
1
vote
1
answer
245
views
IPTables rules and networking with problems 2
My plan is to have a computer that forwards all traffic from internal interface ens19 to openvpn-interface tun0. The system has 2 physical interfaces: ens18 for local network with Internet connection ...
- 11
1
vote
1
answer
381
views
Unable to open port on debian vps
Trying to open 51820 UDP
I do
iptables -A INPUT -p udp --dport 51820 -j ACCEPT
then iptables -L
I can see
ACCEPT udp -- anywhere anywhere udp dpt:51820
then I do
/sbin/...
- 55
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
883
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 ...
- 11
1
vote
0
answers
382
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.
...
- 11
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 ...
- 11
1
vote
0
answers
343
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 ...
1
vote
1
answer
90
views
port forwording using iptables on centos7
I am using Centos7 in my physical server with public address and I have guest machine running on KVM environment with private IP address 192.168.122.2 I need to install httpd in the guest machine and ...
- 13
1
vote
1
answer
288
views
Firewall on SSH server is refusing connection from my client (it works fine without firewall enabled)
I have an SSH server I would like to connect to from my Android.
I created SSH keys and everything is working fine. My cellphone connects to my server via SSH. No problem there.
The problem starts ...
- 11
1
vote
0
answers
111
views
Give access to CloudFlare IPs in iptables
I trying to DROP all requests except CloudFlare requests, and give SSH access to a certain ip.
so I write this rules :
iptables -P INPUT DROP
iptables -P OUTPUT ACCEPT
iptables -P FORWARD DROP
...
- 113
1
vote
0
answers
1k
views
IPTables not doing what I requested
Community here is awesome!
I have an ASUS 3100 wireless router and about 4 IP Cameras. On my old router it was easy to block outgoing traffic so that I can make sure the cameras weren't "calling ...
- 11