How iptables directs to localhost in this series of iptable rules

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1. IP Networking

iptables - formatting icmp rules

Hi, I am relatively new to firewalls and netfilter. I have a Debian Stretch router box running dnsmasq, connected to a VPN. Occasionally dnsmasq polls all of the desired DNS servers to select the fastest. When it does this it responds to replies of the non-selected DNS servers with a icmp type...

2. Cybersecurity

Need help for iptables rules

Hello, I did 2 scripts. The second one is, I hope, more secure. What do you think? Basic connection (no server, no router, no DHCP and the Ipv6 is disabled) #######script one #################### iptables -F iptables -X -t filter iptables -P INPUT DROP iptables -P FORWARD...

3. UNIX for Advanced & Expert Users

iptables help with rules

Hi, I've been struggling with this all morning and seem to have a blind spot on what the problem is. I'm trying to use iptables to block traffic on a little cluster of raspberry pi's but to allow ssh and ping traffic within it. The cluster has a firewall server with a wifi card connecting to...

4. Proxy Server

IPtable rules for DNS/http/https traffic for specific hosts only, not working.

Hi there, I have a VPS and am working on a little side project for myself and friend which is a DNS proxy. Everything was great till recently. My VPS IP has been detected by some botnet or something, and I believe SMURF attacks are occuring. The VPS provider keeps shutting down my VPS...

5. Web Development

$_SERVER['DOCUMENT_ROOT'] directs to /var/www not ~/public_html

Hi all, Exactly like my title says. I am learning PHP and MySQL and I used to use /var/www/ to host (contain or store) my files (.htm/.php) for testing. I could configure, finally, apache2 to use ~/public_html instead. Now I when I tried to use $_SERVER it still directs (I used echo to show...

6. Red Hat

iptables Rules for my network

Hi Champs i am new in Iptables and trying to write rules for my Samba server.I took some help from internet, created one script and run from rc.local : #Allow loopback iptables -I INPUT -i lo -j ACCEPT # Accept packets from Trusted network iptables -A INPUT -s my-network/subnet -j...

7. Ubuntu

iptables rules (ubuntu)

Could someone help me with writing rules for iptables? I need a dos attacks protection for a game server. port type udp ports 27015:27030 interface: eth0 Accept all packets from all IPs Chek if IP sent more than 50 packets per second Drop all packets from this IP for 5 minutes I would be...

8. Cybersecurity

Editing rules on iptables

Hello, I was playing around with iptables to setup an isolated system. On a SLES10 system, I ran the below to setup my first draft of rules. I noticed that the rules come into effect immediately and do not require any restart of iptables. iptables -A INPUT -j ACCEPT iptables -A OUTPUT -m...

9. IP Networking

Iptables rules at boot

Hi I have small home network and I want to block some forums on web When I use this iptables -A INPUT -s forum -j DROP rules is applied but when I restart some of PC rules are not present any more also I tried to save firewall settings iptables-save > /root/dsl.fw but how to...

UNIX for Advanced & Expert Users