Difference between revisions of "Networking"
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| − | + | Here are the articles that deal with networking: | |
| + | |||
| + | * [[connect to the net]] | ||
| + | * [[set up networking]] | ||
| + | * [[set up Network Address Translation]] | ||
| + | * [[teaming your network cards]] | ||
| + | * [[set up a firewall]] | ||
| + | * [[networking commands]] | ||
| + | * [[network troubleshooting]] | ||
| + | * [[network sniffing]] | ||
| + | |||
| + | = Network hints = | ||
| + | * find out if you are connected to the internet: | ||
| + | ping <abbr title="google's name server">8.8.8.8</abbr> | ||
| + | * find all computers in the subnet | ||
| + | nmap -sP <abbr title="subnet">192.168.178.0/24</abbr> | ||
| + | * test mtu: | ||
| + | ping -Mdo -s <abbr title="test if packets of 9000 byte (incl. overhead) are possible">8972</abbr> <abbr title="the peer you want to test communication with">192.168.178.1</abbr> | ||
| + | * show all connections: | ||
| + | [[netstat]] -putan | ||
| + | * show all server sockets that are listening: | ||
| + | [[lsof]] -i | ||
| + | * find out if [http://en.wikipedia.org/wiki/TCP_Offload_Engine TOE] is switched on | ||
| + | # ethtool --show-offload eth2 | ||
| + | Offload parameters for eth2: | ||
| + | rx-checksumming: on | ||
| + | tx-checksumming: on | ||
| + | scatter-gather: on | ||
| + | tcp-segmentation-offload: on | ||
| + | udp-fragmentation-offload: off | ||
| + | generic-segmentation-offload: on | ||
| + | generic-receive-offload: on | ||
| + | large-receive-offload: on | ||
| + | * fake MAC address | ||
| + | ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx | ||
| + | |||
| + | * listen on a specific port | ||
| + | ngrep -qd lo port 21 | ||
| + | |||
| + | * create WLAN traffic | ||
| + | aireplay -3 -b <MACofAP> -h <MACtoFake> -x 600 eth1 | ||
| + | |||
| + | * slow down port 1234 | ||
| + | tc qdisc add dev eth0 root handle 1: cbq avpkt 1000 bandwidth 10mbit | ||
| + | tc class add dev eth0 parent 1: classid 1:1 cbq rate 8kbit allot 1500 prio 5 bounded isolated | ||
| + | tc filter add dev eth0 parent 1: protocol ip prio 16 u32 match ip sport 1234 0xffff flowid 1:1 | ||
| + | tc qdisc add dev eth0 parent 1:1 sfq perturb 10 | ||
| + | |||
| + | = Network tools = | ||
| + | * [[TCPDump]] | ||
| + | * [[netStat]] | ||
| + | * [[ping]] | ||
| + | * [[ipTraf]] | ||
| + | * [[nMap]] | ||
| + | |||
| + | = Services = | ||
| + | * [[set up a web server]] | ||
| + | * [[control a Computer via the network]] | ||
Latest revision as of 10:49, 1 January 2021
Here are the articles that deal with networking:
- connect to the net
- set up networking
- set up Network Address Translation
- teaming your network cards
- set up a firewall
- networking commands
- network troubleshooting
- network sniffing
Network hints
- find out if you are connected to the internet:
ping 8.8.8.8
- find all computers in the subnet
nmap -sP 192.168.178.0/24
- test mtu:
ping -Mdo -s 8972 192.168.178.1
- show all connections:
netstat -putan
- show all server sockets that are listening:
lsof -i
- find out if TOE is switched on
# ethtool --show-offload eth2 Offload parameters for eth2: rx-checksumming: on tx-checksumming: on scatter-gather: on tcp-segmentation-offload: on udp-fragmentation-offload: off generic-segmentation-offload: on generic-receive-offload: on large-receive-offload: on
- fake MAC address
ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx
- listen on a specific port
ngrep -qd lo port 21
- create WLAN traffic
aireplay -3 -b <MACofAP> -h <MACtoFake> -x 600 eth1
- slow down port 1234
tc qdisc add dev eth0 root handle 1: cbq avpkt 1000 bandwidth 10mbit tc class add dev eth0 parent 1: classid 1:1 cbq rate 8kbit allot 1500 prio 5 bounded isolated tc filter add dev eth0 parent 1: protocol ip prio 16 u32 match ip sport 1234 0xffff flowid 1:1 tc qdisc add dev eth0 parent 1:1 sfq perturb 10
