Network Engineering

FEBRUARY 16, 2025

These sub-interfaces are configured with IP addresses and OSPF. A single physical interface has multiple sub-interfaces (VLAN interfaces). The MTU of the physical interface has been increased, but the MTU of the VLAN interfaces has not been changed. The MTU remained unchanged when I checked the OSPF hello packets in Wireshark.

Port 130

Port IP Address Routers 130

Network Engineering

JANUARY 31, 2025

Ive also configured SVI 999 with an IP address of 10.10.10.2/24. You can see the topology in the picture below. Ive configured the management VLAN on the switch to be VLAN 999 to separate the management traffic from user traffic. The default gateway is already configured on the switch as well (which is 10.10.10.1,

IP Address 130

IP Address Topology Gateway Routers 130

Network Engineering

MARCH 26, 2025

x IP address GigabitEthernet1/2 is "inside" interface with 172.2x.y.z The Default Gateway Firewall should also take care of receiving and giving its ping replies to the desktop. -- Information about devices -- Firewalls: GigabitEthernet1/1 is "outside" interface with 192.168.1.x 255.255.255.0 255.255.255.0

Firewall 130

Firewall Gateway Routers IP Address 130

Network Engineering

JANUARY 25, 2025

the devices connected to LAN 1 have an IP adress of (192.168.0.x), x), and the devices connected to LAN 2 have IP address in the form of (192.168.1.x). we have 2 different LANs, a printer and some PCs are connected to LAN 1 via an ethernet cable, and some PCs are connected to LAN 2, also via an ethernet cable.

LAN 130

LAN Ethernet IP Address Routers 130

Network Engineering

JANUARY 31, 2025

Box assigns - and reserves - static IP addresses in the same network segment of its LAN to the VPN interfaces of the clients. The addresses are, quite obviously, outside the DHCP range. I'm wondering whether a Wireguard setup similar to that used in the Fritz!Box Box routers can be replicated between Linux hosts.

LAN 130

LAN VPN IP Address Routers 130

Network Engineering

MARCH 24, 2025

After doing a switchover between the passive and the active host, the access is restored.

IP Address 130

IP Address Networking Network Ethernet 130

Network Engineering

FEBRUARY 28, 2025

I am working 2 cisco firepower 1120 firewalls, which are connected to a 5-port layer-2 switch through their "outside"(Ethernet1/1) interfaces, each with an IP address of the form 192.168.1.x On that same switch, I have a computer with the same IP format of 192.168.1.x, x with a subnet mask of 255.255.255.0.

Firewall 130

Firewall IP Address Gateway Port 130

Network Engineering

MARCH 14, 2025

From here it is possible to re-direct the TCP frames towards any external IP address - well, at least Mikrotik devices feature packet sniffer that can redirect the captured traffic to an arbitrary server.

TCP 130

TCP IP Address Server Internet 130

Network Engineering

DECEMBER 4, 2024

Another challenge is that the network infrastructures in SITE A and SITE B share the same IP blocks, and I cannot change them. For example, when I want to access the computer in SITE A and ping 192.168.1.100, the same IP exists in SITE B.

VPN 130

VPN IP Address WAN Routers 130

Docker Blog

FEBRUARY 28, 2025

x.x.x ) could reach unpublished container ports if they knew (or guessed) its IP address. Another machine on the same LAN (or an attached subnet) routed traffic to the containers IP address. In multi-tenant LAN environments or other shared local networks, someone connected on an RFC1918 subnet (such as 192.168.x.x

Engineering 185

Engineering Networking Network LAN 185

Network Engineering

APRIL 8, 2025

24 gateway 10.0.12.52 (wireguard client IP house1) target: 192.168.44.0/24 and 104.19.223.79), which are the public IPs for that website, then the situation changes. What I tested so far:- If set a static route in Brume2 for IPV4 to as follows target:192.168.33.0/24

Internet 130

Internet LAN VPN Gateway 130

CATO Networks

MAY 20, 2024

In the ever-evolving threat landscape, identifying and blocking malicious IP addresses is an essential defense mechanism. Unlike domain names, the registration details for IP addresses are less transparent, making it more challenging to access ownership information, registration dates, and the responsible parties.

IP Address 52

IP Address Server Port SMB 52

Dataversity

JULY 22, 2021

When Internet Protocol (IP) addresses were created in 1981, nobody thought of running out of IPs. As technology started to scale at an unprecedented rate, it became clear that there wouldn’t be enough IP resources. The post IPv4 vs. IPv6: Which Type of IP Address Benefits Businesses More?

IP Address 52

IP Address Protocol Internet IoT 52

Network Engineering

AUGUST 16, 2024

with destination port 1234 and destination ip address 192.168.1.2 Then router forwards connection to destination ip address 192.168.2.2 When forwarding the packet out of f0/0 to ip address 192.168.2.2 and destination port 5678, here be careful, then with source ip address of f0/0 192.168.2.1.

Port 130

Port Routers IP Address Topology 130

Network Engineering

FEBRUARY 21, 2024

So here's the situation that I have at my workplace (local municipality): I have received from my ISP a static IP address with a provided gateway, which all works normally when I input it into my router (ISP's router works in bridge mode).

Port 130

Port WAN Routers IP Address 130

Network Engineering

JUNE 5, 2020

I have two private IP addresses, want to make them NAT to 203.0.113.0/2 2 public IP address. WAY 1 : Static NAT (2 ip addresses NATted to one by manually) WAY 2 : PAT (Router gives port number for each device randomly) Question is that : Why doesn't router apply the same things on Static NATting?

IP Address 130

IP Address Routers Port Network 130

Network Engineering

SEPTEMBER 23, 2021

How do I write a named extended ACL which will allow for traffic between a DNS from a LAN (IP address) to a DNS server at (IP address), ping from a host PC (IP address) to any destination and allow for telnet packets from a telnet server with any source address going to any destination?

IP Address 130

IP Address Routers DNS LAN 130

Network Engineering

DECEMBER 7, 2022

For reasons that are not important, we have a customer that wants to ensure that it can not work on an actual IP network and only direct. So, we changed our firmware so that the fixed IP addresses are 127.0.0.0 Are there any IP addresses that will not flow through a switch? and 127.0.0.1.

IP Address 130

IP Address Networking Network Routers 130

Network Engineering

JULY 2, 2020

interface GigabitEthernet0/0/0 no ip address duplex auto speed auto ! encapsulation dot 1Q 10 ip address 10.1.1.254 255.255.255.0 ! interface GigabitEthernet0/0/1 no ip address duplex auto speed auto ! no ip address ! interface Vlan1 no ip address ! ip classless !

IP Address 130

IP Address Routers Topology Gateway 130

Network Engineering

SEPTEMBER 26, 2015

interface GigabitEthernet0/0 no ip address duplex auto speed auto ! encapsulation dot1Q 10 ip address 192.168.10.1 ip nat inside ! encapsulation dot1Q 20 ip address 192.168.20.1 ip nat inside ! encapsulation dot1Q 30 ip address 192.168.30.1 ip nat inside ! ip nat inside !

IP Address 130

IP Address TCP Internet Networking 130

NW Kings

FEBRUARY 28, 2025

It covers various essential topics, such as network fundamentals, routing and switching, IP addressing, and basic security principles. DHCP automates the process of assigning IP addresses to devices on a network. NAT allows multiple devices on a private network to access the internet using a single public IP address.

Firewall 52

Firewall IP Address Networking Network 52

Network Engineering

FEBRUARY 12, 2020

interface GigabitEthernet0/0/0 description SAF WAN ip address X.139.250.X ip nat outside negotiation auto ! interface GigabitEthernet0/0/1 description LAN ip address X.21.10.X ip nat inside negotiation auto ! interface GigabitEthernet0/0/2 no ip address shutdown negotiation auto ! X 255.255.0.0

IP Address 130

IP Address Server VPN Port 130

Network Engineering

JULY 12, 2019

! ! interface GigabitEthernet0/0 ip address 209.165.101.1 interface GigabitEthernet0/1 ip address 192.168.11.1 interface GigabitEthernet0/2 no ip address duplex auto speed auto shutdown ! interface Vlan1 no ip address shutdown ! ip classless ip route 0.0.0.0 255.255.255.0

IP Address 130

IP Address VPN Encryption Protocol 130

Network Engineering

FEBRUARY 2, 2024

vlan database vlan 10,20 exit interface vlan 1 ip address 101.205.25.252 255.255.255.0 no ip address dhcp ! interface vlan 10 ip address 101.205.10.1 interface vlan 20 ip address 101.205.20.1 The switch's configuration: show running-config: v1.4.0.88 / R800_NIK_1_4_194_194 CLI v1.0

IP Address 130

IP Address Port Routers 130

Network Engineering

DECEMBER 16, 2015

Our Outside interface and DMZ interfaces have routable IP addresses and DMZ subnet is routed via IP address of the outside interface. interface GigabitEthernet0/0 nameif outside security-level 0 ip address 123.123.6.243 255.255.255.248 interface GigabitEthernet0/1 nameif inside security-level 50 ip address 192.168.50.4

IP Address 130

IP Address Port TCP Server 130

Network Engineering

AUGUST 12, 2020

0.255.255.255 ip nat inside source list 50 interface GigabitEthernet0/0/1 overload interface GigabitEthernet0/0/1 description PUBLIC-NET ip address 3.3.3.1 ip nat outside negotiation auto ! interface GigabitEthernet0/0/0 ip address 10.0.0.1 ip nat inside ! 255.255.252.0 255.255.255.0

IP Address 130

IP Address 130

4sysops

APRIL 11, 2025

This functionality works by containing the IP addresses of devices that have not yet been recognized or onboarded into the Defender for Endpoint system. By limiting communications with these undiscovered endpoints, the feature aims to stop threat actors from compromising additional devices.

IP Address 52

IP Address Networking Network 52

Network Engineering

MAY 5, 2023

Router(config)#interface GigabitEthernet0/0 Router(config-if)#ip address 172.17.2.1 255.255.255.252 Router(config-if)# Router(config-if)#exit Router(config)#interface GigabitEthernet0/2 Router(config-if)#ip address 172.16.10.1 Router(config)#interface GigabitEthernet0/0 Router(config-if)#ip address 172.17.2.1

IP Address 130

IP Address Routers Protocol Networking 130

Network Engineering

JANUARY 14, 2025

If I assign a static IP on the device level that is within the DHCP range of the network it's on, but don't reserve its address on the DHCP server, will the device lose its IP address or be disconnected if the router restarts?

IP Address 130

IP Address Routers Server Networking 130

CloudFaire

MARCH 18, 2025

There is also the increasing complexity added by attackers rotating IP addresses, routing through proxies, and using VPNs. The new TopN section is where you can view the top statistics of attributes such as hostname, autonomous system (ASN) , user agent, browser, source IP address, country, and OS.

IP Address 82

IP Address Application Internet Server 82

Network Engineering

AUGUST 12, 2019

I am so confused with fundamentals that I used to be an expert in, so I have this topology Please answer to my questions separately, Question 1) So if I have two DNS severs, and ofc two IP address(81.1.1.30 & 31) available from the ISP This config would be suffice for Port forwarding? Switch3650(config-if)#ip add 81.1.1.30

IP Address 130

IP Address Topology DNS Port 130

Engineering at Meta

NOVEMBER 8, 2023

Protect IP Address in Calls” is a new setting on WhatsApp that helps hide your location from other parties on the call. Then in October 2023, WhatsApp began rolling out “Protect IP Address in Calls” which hides your IP from the other party by relaying calls through WhatsApp Servers.

IP Address 129

IP Address Protocol Server Encryption 129

Network Engineering

JUNE 17, 2024

is it possible to build the traffic flow from "Ground floor" to "ISP MUX" on the same IP address? I've situation like below: I've only "14.14.14.0/30" without interrupting the operational work in 4th floor.,, I think there might be ARP issues. if I go ahead. can you please suggest how to make this work?

IP Address 130

IP Address Networking Network 130

Network Engineering

APRIL 13, 2020

Where lies the link between symmetric NAT and that each request is mapped to a unique external source IP address and port? After searching a while, I'm still not able to find a logical explanation on why it's called symmetric NAT. Is there any at all?

IP Address 130

IP Address Port Network Networking 130

CloudFaire

MARCH 19, 2025

However, given our architecture design, we have primarily handled private network application access (applications tied to private IP addresses or hostnames) through the network firewall component of our Secure Web Gateway (SWG) service, Cloudflare Gateway. Any device or virtual machine will have a private IP address.

Application 89

Application IP Address Gateway DNS 89

Network Engineering

JULY 19, 2017

My question is: how do I get all the device information such as (IP address, MAC address, Serial Number) from My-PC to Another-PC ? I've two devices: My-PC and Another-PC. The two devices are connected to a switch, which is connected to main switch with-in the same LAN.

IP Address 130

IP Address LAN 130

Network Engineering

DECEMBER 8, 2015

255.255.255.252 Device Interface IP Address Subnet Mask Default Gateway London Fa0/0 193.10.156.1 PC5 193.10.156.134 255.255.255.240 193.10.156.137 PC6 193.10.156.150 255.255.255.224 193.10.156.121 The FA interface will get the first usable IP address and the PCs will get the last one. 255.255.255.224 Fa0/1 20 193.10.156.32

IP Address 130

IP Address Gateway 130