IPv6 Uptake
IPv6 Users per AS
IPv6 Relative Performance
DNSSEC RSA Validation
DNS Resolver use
Users per AS

To test the HA crossover connection, here are some commands to verify that your crossover is working and sending data.

Please note, changing your handset’s IMEI number may void warranty or break the law. As far as I know, it’s strictly prohibited to change any phone’s IMEI number in the UK. So always refer to your user manual and local law, you are responsible for any action you take.

How to deternine what QRadar processes are using the most resources.

Open source licenses grant permission for anybody to use, modify, and share licensed software for any purpose, subject to conditions preserving the provenance and openness of the software. The following licenses are sorted by the number of conditions, from most (GNU AGPLv3) to none (Unlicense). Notice that the popular licenses featured on the home page (GNU GPLv3 and MIT) fall within this spectrum.

This document provides administrators and engineers guidance on securing Cisco firewall appliances, which increases the overall security of an end-to end architecture. The functions of network devices are structured around three planes: management, control, and data. This document is structured around security operations (best practices) and the three functional planes of a network. In addition, this document provides an overview of each included feature and references to related documentation. For the purposes of this document, all mentions of "Cisco firewall" refer explicitly to the Cisco ASA Adaptive Security Appliances, though the concepts may apply to other firewall and security devices.

What is the impact of initiating a Deploy Full Configuration on QRadar systems?

Features:

- ipv4 allocation table
- some registration data of all assigned and allocated blocks
- AS information and announced own prefixes
- geolocation data for ipv4 addresses
- all domains for ip address

Limitations:

- 500 requests from registered users within 24 hours.
- 200 requests from one ip address within 24 hours for unregistered users.

Data sources:

- registered blocks: regional registers: RIPE NCC, ARIN, APNIC, LACNIC, AFRINIC
- BGP table: Route Views Project
- Geolocation data: NetLoad, MAXMIND, IpGeoBase.ru, local additions. This site or product includes IP2Location LITE data available from http://lite.ip2location.com.
- Icons: Fugue Icons
- Flags: flags.blogpotato.de and Maxmind
- Social icons: komodomedia

General overview of the Event Pipeline and Processes

This is a nice question.

As a matter of fact, tcpdump is the first software found after the wire (and the NIC, if you will) on the way IN, and the last one on the way OUT.

Wire -> NIC -> tcpdump -> netfilter/iptables

iptables -> tcpdump -> NIC -> Wire
Thus it sees all packets reaching your interface, and all packets leaving your interface. Since packets to port 53 do not get a reply, as seen by tcpdump, you have successfully verified that your iptables rules have been correctly configured.

EDIT

Perhaps I should add a few details. tcpdump is based on libpcap, a library which creates a packet socket. When a regular packet is received in the network stack, the kernel first checks to see whether there is a packet socket interested in the newly arrived packet and, if there is one, it forwards the packet to that packet socket. If the option ETH_P_ALL is chosen, then all protocols go thru the packet socket.

libpcap implements one such packet socket with the option activated, keeps a copy for its own use, and duplicates the packet back onto the network stack, where it is processed by the kernel in the usual way, including passing it first to netfilter, the kernel-space counterpart of iptables. Same thing, in reverse order (i.e., first netfilter then last the passage thru the packet socket), on the way out.

Is this prone to hacking? But of course. There are certainly proof-of-concept rootkits using libpcap to intercept communications destined to the rootkit before the firewall can lay its hand on them. But even this pales in comparison with the fact that a simple Google query unearths working code hiding traffic even from libpcap. Still, most professionals think the advantages vastly outweigh the disadvantages, in debugging network packet filters.