Network engineers notepad

GRE via IPSEC This lab shows us how to configure a conventional GRE tunnel over IPSEC. GRE is great for emulating a conventional P2P link and is often used in secondary connections via an ISP. This configuration is based on a LAB by the fantastic GNS3 Vault please check them out if you want a more detailed explanation of how to configure the below.   # #################### ## INTERNET ## ##################### int fa0/0 ip addr 192.168.12.2 255.255.255.0 no shut int fa0/1 ip addr 192.168.23.2 255.255.255.0 no shut router eigrp 1 network 192.168.12.0 network 192.168.23.0 ##################### ## NYC ## ##################### int fa0/0 ip addr 192.168.12.1 255.255.255.0 no shut int lo1  ip addr 1.1.1.1 255.255.255.0 router eigrp 1 network 192.168.12.0 router ospf 1  network 192.168.13.0 0.0.0.255 area 0   network 1.1.1.0 0.0.0.255 a...

Cisco ISR IPSEC to IPSEC (GNS3) This is a basic  config for IPsec to IPsec tunneling between two cisco ISRs. I prefer to use GRE tunneling for Lan to Lan but this is commonly used when connecting to 3rd parties or where GRE tunneling is not available. ############################### ## NYC ## ############################## # conf t router ospf 1 network 30.0.0.0 0.0.0.255 area 0 network 1.1.1.0 0.0.0.255 area 0 ip access-list ext 101  permit icmp host 1.1.1.1 host 3.3.3.3 crypto isakmp policy 10  encr aes 256  authentication pre-share  group 5  lifetime 1300 crypto isakmp key 0 vault address 40.0.0.1  crypto ipsec security-association lifetime seconds 1800 crypto ipsec transform-set MYSET esp-aes esp-sha-hmac crypto map MYMAP 10 ipsec-isakmp  set peer 40.0.0.1  set transform-set MYSET  match address 101 int fa0/0  ip addr 30.0.0.1 255.255.255.0  crypto map MYMA...

IPSEC over GRE  Not something that you would want to do in production but the following configuration is to tunnel IPSEC over GRE (As apposed to GRE inside IPSEC). This is based on a lab from the excellent gns3vault.com link below for the video explanation and final configs. http://gns3vault.com/tunneling/gre-over-ipsec/ ######################## ## NYC ## ######################## int fa0/0  ip addr 192.168.12.1 255.255.255.0  no shut int lo0  ip addr 11.11.11.11 255.255.255.0 crypto isakmp policy 1 encryption aes 256 group 5 authentication pre-shar crypto isakmp key 0 PA$$WORD address 192.168.23.3 crypto ipsec  transform-set NY_TRANS_SET esp-aes esp-sha-hmac crypto ipsec profile TUNNEL_PROTECT  set transform-set NY_TRANS_SET int tu10  tunnel source fa0/0  tunnel destination 192.168.23.3  tunnel mode ipsec ipv4  tunnel protection ipsec profile TUNNEL_PROTECT ip route 33.33.33.0 255.255.255.0 1...

Quick page to remind me how to configure OSPF on SRX's as its been a while. ############# # R1 # ############# set interfaces ge-0/0/0 unit 0 family inet address 10.0.0.1/30 set interfaces ge-0/0/1 unit 0 family inet address 192.168.0.1/24 set interfaces lo0 unit 0 family inet address 1.1.1.1/32 set routing-options router-id 1.1.1.1 set protocols ospf area 0.0.0.0 interface ge-0/0/0.0 set security zones security-zone TRUST interfaces ge-0/0/0.0 host-inbound-traffic system-services ping set security zones security-zone TRUST interfaces ge-0/0/0.0 host-inbound-traffic system-services traceroute set security zones security-zone TRUST interfaces ge-0/0/0.0 host-inbound-traffic system-services ssh set security zones security-zone TRUST interfaces ge-0/0/0.0 host-inbound-traffic protocols ospf set security zones security-zone TRUST address-book address BAML 159.5.153.0/24 set security zones security-zone TRUST host-inbound-traffic system-services all se...

1. Connect to the serial console. 2. Power off the router and then power on. 3. Send the router a  BREAK . This should bring you to the  rommon  prompt 4. Type this command at the rommon prompt in order to boot from Flash. rommon 1 > confreg 0x2142 5. Reset the router. rommon 2 > reset 6. The router should now boot into the Initial config dialogue: Would you like to enter the initial configuration dialog? [yes/no]: yes 7. Follow the prompts, to set a basic config. 8. Enter enable mode and set the router to boot from the right place Router> enable Router> conf t Router(config)> config-register 0x2102 Router(config)> end Router> wr mem 9. Reload the router to check it worked properly

I use the below if i am working in lab environment and want to test something that does not require security to be configured. It is 100 percent not best practice for a production enviroment but if you only have SRX's in your lab and security is not a concern then its a passable workaround. set security forwarding-options family inet6 mode packet-based set security forwarding-options family mpls mode packet-based set security forwarding-options family iso mode packet-based

This page is all the things you should try and memorize when learning to code in python. Check out Learnpythonthehardway.org if you want to learn more about python. Symbols : + plus - minus / slash * asterisk % percent < less-than > greater-than <= less-than-equal >= greater-than-equal Escape Sequences This all of the escape sequences Python supports. You may not use many of these, but memorize their format and what they do anyway. Try them out in some strings to see if you can make them work. ESCAPE WHAT IT DOES. \\ Backslash (\) \' Single-quote (') \" Double-quote (") \a ASCII bell (BEL) \b ASCII backspace (BS) \f ASCII formfeed (FF) \n ASCII linefeed (LF) \N{name} Character named name in the Unicode database (Unicode only) \r Carriage Return (CR) \t Horizontal Tab (TAB) \uxxxx Character with 16-bit hex value xxxx (Unicode only) \Uxxxxxxxx Character with 32-bit hex value xxxxxxxx (Unicode only) \v ASCII vertic...