Press "Enter" to skip to content

Posts published in “Computer & Internet”

can government change setting in my server? [on hold]

In Iran, the government shut down most Internet access, but some servers in some data centers still have Internet access.

So I opened an ssh connection to a (Internet-connected) server and tunneled my system. This worked f...

Layer 3 switch as DHCP server

Hey guys I am quite new to Cisco networking and doing labs at the moment and thought if it is possible for a Layer 3 switch to be a DHCP server for let's say 3 VLANs?

OSPFv2 through firewall

My network. https://imgur.com/a/5QI1NNq

So my question is, on the 3 yellow above. Sub networks, I've used static routing, but on the other side of the internet (blue field) I've used Ospfv2. on the purple, green, yellow an...

School internet stops working when I change my DNS [on hold]

On my laptop I have my DNS servers set to 1.1.1.1, and 1.0.0.1 (Cloudflare DNS). However, when I connect to my schools network my internet stops working completely. I am aware that they are using the Fortiguard Webfilter DNS ...

how does a program detect an ethernet switch change? [on hold]

I am trying to change an ethernet switch on a system.I configured the switch to match the network settings and The network seems to work and data is still transmitted between the other devices via the new switch BUT the progr...

How to troubleshoot SFP+ connection flapping? [on hold]

I'm trying to set up an SFP+ connection between two servers. The port keeps flapping.

root@routeur:~# dmesg|tail
[20266.254806] ixgbe 0000:04:00.1 eno8: NIC Link is Up 10 Gbps, Flow Control: RX/TX
[20266.259946] ixgbe 0000:...

BPF filter begin to end (range)

Using tcpdump, I am capturing a tcp stream on a port and data is ASCII. I am not certain if each packet has the entire message. I know how the message begins and ends so I would like to setup a filter where I can capture the ...

Network scan against host on different VLANs (Nmap)

I need to scan some hosts located on a different VLAN using Nmap, but those machines are unreachable from the VLAN used to launch the scan, I assume that that is because a FW sited between both VLANs. Any idea about how could...