Created
April 11, 2017 21:59
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This is memo script that replay the DNS traffic captured in order to load a DNS Server for test purpose.
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| # To be executed on the DNS server and output to be copied | |
| dif=bond1 | |
| dip=$(ip addr show dev $dif | egrep -o '(addr:)?([0-9]*\.){3}[0-9]*' | head -n1) | |
| dmac=$(ip link show dev $dif | egrep -o '(link/ether:)?([0-9a-f]{2}\:){5}[0-9a-f]{2}' |head -n1) | |
| echo -e "dmac=$dmac \ndip=$dip" | |
| #To be executed on the injector | |
| #Past the previous copied content from the DNS server | |
| sif=bond1 | |
| sip=$(ip addr show dev $sif | egrep -o '(addr:)?([0-9]*\.){3}[0-9]*' | head -n1) | |
| smac=$(ip link show dev $sif | egrep -o '(link/ether:)?([0-9a-f]{2}\:){5}[0-9a-f]{2}' |head -n1) | |
| time=$(date +"%Y%m%d-%H.%M.%S") | |
| echo $time | |
| # Rewrite IP and mac @ on a new capture | |
| tcprewrite -i dnstraffic01.pcap -S 0.0.0.0/0:$sip/32 --enet-smac=$smac --enet-vlan=del -D 0.0.0.0/0:$dip/32 --enet-dmac=$dmac -C -o dnstrafic01-rewritten.$time | |
| #Replay the DNS capture | |
| tcpreplay --enable-file-cache --timer=gtod -i $sif -p 35000 -l0 dnstrafic01-rewritten.$time | |
| #Monitor the bandwith on the DNS server | |
| sar -n DEV 1 1000 |
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