Categories
Networking

List TCP Connections on my computer

List Interfaces

sudo tcpdump -D

Filter Parameters

  • host
  • dst
  • src
  • port

Interfaces

sudo tcpdump -i any
sudo tcpdump -i any -c 10
sudo tcpdump -i any -c5 -nn
ValueFlag TypeDescription
SSYNConnection Start
FFINConnection Finish
PPUSHData push
RRSTConnection reset
.ACKAcknowledgement

Capture ICMP protocol

sudo tcpdump -i any -c5 icmp

Limit using host filter

sudo tcpdump -i any -c5 -nn host x.x.x.x

Limit using the port filter

sudo tcpdump -i any -c5 -nn port 80

Limit using the src filter

sudo tcpdump -i any -c5 -nn src x.x.x.x

Limit using the dest filter

sudo tcpdump -i any -c5 -nn dst x.x.x.x

Limit using multiple filters

sudo tcpdump -i any -c5 -nn src x.x.x.x and port 80
Categories
Networking

MikroTik basic terminal commands

Show walled-garden IP

ip hotspot walled-garden ip print

Categories
Networking

Can’t ping Juniper SRX

Assign the interface to the security zone

#set security zones security-zone untrust interfaces ge-0/0/0

Enable ping in the security zone

#set security zones security-zone host-inbound-traffic system-services ping
#commit check
#commit
Categories
Networking

Juniper SRX Install Software

Initial check

user@host> request system snapshot
user@host> request system snapshot media internal

Installing image

user@host> request system software add [package location]/[package name] reboot
user@host>request system software add "ftp://test.jnpr.net/pub/junos/7.5R2.8/jinstall-7.5R2.8-domestic-signed.tgz reboot
user@host>request system software add /var/tmp/7.5R2.8/jinstall-7.5R2.8-domestic-signed.tgz reboot

Other options

user@host>request system software add /var/tmp/7.5R2.8/jinstall-7.5R2.8-domestic-signed.tgz no-validate no-copy reboot

Installing step by step

user@host>file copy ftp://username:prompt@ftp.hostname.net/filename  /var/tmp/
user@host> request system software add /var/tmp/jinstall-8.x-package-name-signed.tgz
user@host> request system reboot

Primary and backup copy to be the same

user@host> request system snapshot slice alternate
Categories
Networking

Juniper Ansible Playbook setup

Check if netconf is enabled

ssh admin@xx.xx.xx.xx -p 830 -s netconf