All Questions
31
questions
1
vote
1
answer
143
views
Explicit Congestion Notification (ECN), Why isn't the notification done by the Router?
Quoting from Wikipedia:
"When both endpoints support ECN they mark their packets with ECT(0) or ECT(1). Routers treat the ECT(0) and ECT(1) codepoints as equivalent. If the packet traverses an ...
0
votes
1
answer
65
views
Connecting delay on local network (SYN RETRANSMISSION)
Somebody knows what could be the issue?
More often than not I can not connect instantly to my IP camera or local server and have a initial delay of around 10 seconds before it connects to the camera (...
user1888803
0
votes
0
answers
43
views
Teardrop detected from TCP ACK from myself
I'm experimenting with linux (Debian 5.10) networking to allow me to connect two networks (eg. 192.168.0.0/24 with 172.17.0.0/16) together.
Setup
In my case it is a small server with one NIC, hosting ...
- 126
1
vote
1
answer
172
views
How can I get connection attempts behind a NAT router?
I've been playing with nftables recently and set up logging every incoming TCP SYN packet to my local machine. I noticed every minute I get a couple of random connection attempts on various ports (...
0
votes
1
answer
74
views
New LAN from Linux PC
I've got one Linux PC connected to the Internet but I want to connect more devices to the PC using TCP/IP but I don't want the router to act as a DHCP Server for them. I mean, I don't want the router ...
0
votes
1
answer
134
views
What is the source ip dest ip source mac and dest mac in Gratuitous ARP response
So I am sitting at host A. And I need to send Gratuitous ARP response to Host B. in Gratuitous ARP response I dont know the mac address of Host B my computer on LAN. But can I add 0xFFFFFFFFFFFF to my ...
- 133
1
vote
1
answer
730
views
Why does my internet connection only work properly with a UDP-based VPN?
My house is connected to the main router in another building via a single LAN cable that is run partially underground, partially outside (along the wall of the house). There is one switch on the route,...
- 11
-1
votes
1
answer
536
views
What handshakes happen (or need to happen) when I connect my FPGA with Ethernet cable to my home router+modem device in one of its ethernet port? [closed]
I have a FPGA edge device. I want to send and receive ethernet packets to my laptop through the router+modem device at my house. My laptop is connected to the router+modem through the wifi (for ...
- 5
0
votes
1
answer
1k
views
Troubleshooting transport layer connectivity issues with pfSense
I am building a virtual network of vhosts that is NATed out to the internet through pfSense. For some reason, vhosts cannot establish connections to the outside world, although lower-layer operations ...
- 156
1
vote
1
answer
71
views
Assigning IP addresses manually
I have internet connection from a local ISP at home. I see other routers and their IP addresses on my network using wireshark, when I connect the ethernet cable from ISP directly to my laptop using ...
0
votes
1
answer
281
views
How can I stabilize my wireless internet connection if it keeps dropping?
My current internet connection is very unstable. I'm using a Windows laptop connected to a 4G smartphone's Wi-Fi hotspot. The 4G signal is often so weak that it disconnects my phone from the network ...
- 867
1
vote
1
answer
2k
views
How do I capture packets between a WiFi router and an internet modem?
In my home all devices were connected to my router. I want to capture all traffic so I have done below connection:
Modem --- (Ethernet to USB Adapter) --> Laptop (Windows 10) --- (Ethernet CABLE) -...
- 111
0
votes
1
answer
530
views
Wifi-Lan Port blocking
I'm writing a paired (windows) server and (android) client application suite that uses TCP connections over wifi on a funny port number. The Server advertises its availability using Bonjour/Zeroconf.
...
- 105
0
votes
1
answer
49
views
identify individual devices from aggregate traffic of router
Is it possible and if yes how to identify individual devices (laptop vs. mobile phone vs TV) when listening to the aggregate traffic of a wifi router?
Assumption: all devices of interest are ...
- 151
0
votes
0
answers
599
views
Port is filtered by nmap
Long story short:
I have opened a port one computer and I'm trying to access it from other computer in different network. It's failing.
Details:
I have 2 laptops:
A - Ubuntu 16.04, firewall off, ...
- 101