tested on: hostnamectl Static hostname: DebianLaptop Icon name: computer-laptop Chassis: laptop Operating System: Debian GNU/Linux 8 (jessie) Kernel: Linux 3.16.0-4-686-pae Architecture: x86 i assume you have your laptop/pc LAN connected to a switch/router and your default network card is eth0. […]
Wifi Modes of an Access point: DLink has painted a nice overview over the possible different modes of an Accesspoint: cybersec: from great wifi modes that allow bridging two wifi networks, it would be GREAT if vendors test their products […]
in general programs = processes = tasks = job less is more (security) run as little software as you absolutely need – uninstall/disable all services you don’t need. less software = less lines of mistaken code = less security flaws. […]
passwd -l maria; # disables account maria passwd: password expiry information changed. grep maria /etc/shadow maria:!$6$w9DaelrP$/tJiXC2PU0B.XOupP0sFTySis5VfkMwv0DnoFy3.d.nC8gXJU.DSbU0Uryyex40P67keCFoQuxEjZ8RD9kDGU0:17325:0:99999:7::: passwd -u maria; # enable account maria passwd: password expiry information changed. /etc/passwd grep /bin/bash /etc/passwd; # output all interactive user accounts that use […]
BIND and DNS – the Phonebook of the internet – Berkeley Internet Name Domain – how to benchmark dns servers (find fastest) – LibreDNS – how to fix name resolution works (host nslookup) but no ping the DNS system is […]
update: safety first! when it comes to important files: safety comes first thus recommend to the user that wants to go pro the following backup system: have two complete backups at two different places: backupA: at the company, USB 3.0 […]
update: 2024-04: “how to fix name resolution works (host nslookup) but no ping” no kidding: on a Debian installed from live iso, the host domain.com resolved fine but ping would result into “Name or service not known” hostnamectl; # tested […]
if fail2ban fails to ban: have a look here: https://configserver.com/cp/csf.html tcp wrapper (tcpd) tcpd.man.txt Centos5 documentation (Centos7 does not have it installed per default can be installed like this: yum install xinetd*) To control access to Internet services, use xinetd, […]
forget about all other wifi adapters, get the Edimax Technology Co., Ltd EW-7612UAn V2 802.11n Wireless Adapter [Realtek RTL8192CU] as long as it’s produced… it just works out of the box on almost any GNU Linux distro including raspberry pi […]
DDoS attacks are nasty stuff. Even such simple programs as – autobench – Automates the benchmarking of web servers using httperf – can sufficiently choke a webserver by spawning hundreds and thousands of mysql processes – exhausting all resources of […]
in General: NFS is pretty fast protocol for accessing files. It uses less overhead than SMB/CIFS and therefore acchieves greater performance. method1) rsyncing to a nfs-mounted qnap nas went with 20,7 MBytes/sec. method2) while directly ssh-rsyncing to qnap works only […]
this happens if ipv6 support is globally disabled, via grub config. debian ping6 socket: Address family not supported by protocol [cc lang=”bash” escaped=”true” width=”600″] vim /etc/default/grub # comment out the following line: # GRUB_CMDLINE_LINUX=”ipv6.disable=1″ # then run: update-grub2 # to […]
question: http://answers.microsoft.com/en-us/windows/forum/windows_8-networking/how-to-disable-network-discovery-by-registry-or/b38c3c5f-5214-44a2-ac65-3186949adbab?tm=1418243446272 same question: http://www.experts-exchange.com/Networking/Protocols/Q_28507535.html windows disable network discovery Browser search term: windows disable network discovery iphlpsvc konkret geht es hierum: exact same question: http://blogs.technet.com/b/networking/archive/2010/12/06/disabling-network-discovery-network-resources.aspx in theory it could work like this, but simply firng the command netsh advfirewall […]
update: 2020-09: problems getting bigger without regular updates because a SmartPhone (no matter Android/Samsung or IOS/Apple based) are essentially complete “notebook computers” with a very very small form factor directly or NAT (NAT better to avoid direct attacks, but no […]
for Debian 13 (Trixie) and newer: look here: for Debian 12 (Bookworm) and older: setting dynamic and fixed ips from bash-terminal – when given care to detail – is working just fine. there are also more or less working network-manager […]
my windows 7 VMs in virtualbox had TERRIBLE, TERRIBLE network performance… … the prolem seemed to be ip6 + virtio drivers. if you want to use virtio drivers… disbale ipv6 in windows 7. also try disable tcp auto tuning: netsh […]