All Questions
29
questions
16
votes
6
answers
8k
views
Why don't we have a usable IP address in 127.0.0.0?
From theory, each part of an IP address is a number between 0 to 255 (256 usable slots in total).
But why is 0 not used in any IP addresses in their 4th part and they always start from 1 in IP ...
- 633
-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
2
votes
0
answers
736
views
What's the minimum upstream bandwidth required for ACK packets in a TCP connection?
Consumer internet connections often feature asymmetrical bandwidth with just 10% of even 5% of upstream speed compared to downstream, for example 1000MBit/s downstream with 50MBit/s upstream speeds.
I ...
- 221
3
votes
1
answer
13k
views
Why is the TCP MSS (Maximum Segment Size) 1460 bytes?
I'd like to know why the MSS value in the TCP header is 1460 bytes.
I know that the MTU for Ethernet networks is 1500 bytes, that the IP header is 20 bytes and the TCP header is 20 bytes.
But still, ...
- 35
0
votes
1
answer
218
views
is "Empty reply from server" a deliberate reply, or a default one from the TCP/IP stack?
I have a device whose port 80 is open and I was wondering what is behind:
~ # curl -v http://192.168.10.253 root@srv
* ...
- 3,263
1
vote
0
answers
39
views
Disable instant closing of TCP connections when interface or route becomes unavailable in Windows
Whenever there is a brief glitch with my ethernet connection, Windows 10 instantly closes all of my TCP connections going over that interface.
Is there a way to change it so that the connections are ...
- 111
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
2
answers
2k
views
TCP connection closes instantly (without timeout) when I change my IP address through the windows network and sharing center
I have tcp connection to some tcp server on internet. Tcp client is a simple application that I have created which works on my computer. The problem is that when I change my ip address through the ...
- 13
1
vote
1
answer
885
views
Establish TCP connection without knowing recipient's IP adress
I need to establish a TCP connection with another computer (that is not in the same network) without knowing their IP address. Both are running the same TCP server software, however, since their IP ...
- 113
1
vote
0
answers
135
views
configuring TCP/IP port filter in windows 2000 using CMD
i am currently facing a problem to permit a certain TCP/IP Filtering port using CMD.
I have a windows 2000 and is unable to go to control panel. its like an empty windows. no control panel and other ...
- 11
-1
votes
1
answer
216
views
Does a remote TCP Server has to run on Public IP address only
I have interfaced a GSM (Uni4 SIM800) module to a Raspberry-pi-3B module using AT commands to run a simple TCP server, and another pair of GSM and Rospberry-pi to run a TCP client. Now the Telecom ...
0
votes
1
answer
101
views
OpenVPN doesn't forward HTTPS traffic, HTTP works fine
I have an OpenVPN server running on a Raspberry Pi, and I'm encountering issues trying to connect to HTTPS sites using it. I can connect to HTTP sites (confirmed via nc example.com 80). From the ...
- 2,485
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
355
views
How to identify a LDAP packet/frame
I'm developing an application in Java which needs to know if a frame contains a LDAP packet or not. So far, I've figured out how to find out if the frame contains IPv4 and TCP headers but how do I ...
- 243
-1
votes
1
answer
285
views
TCP RST Connection - Netflix - Only on Linux
I wouldn't have asked this here, but I am at wit's end, this makes absolutely no sense at this point. I have been trying everything. I have a single iptables rule:
-A POSTROUTING -o eth0 -j ...
- 334