network programming - Does TCP send a SYN/ACK on every …
This sequence of SYN/ACK/FIN flags is what makes a connection. With UDP, there are no SYNs or ACKs, so communication is one-way, delivery is not guaranteed and order is not preserved. …
Why does this connection keep closing - SYN->SYN,ACK->ACK …
Apr 27, 2011 · I have an application that is sending web requests and after some variable period of time we start getting connection timeout errors. Analysis of the TCP/IP packets reveals the …
Server resending syn/ack after i send ACK - Stack Overflow
Oct 22, 2019 · I am trying to implement raw tcp connections to send query to whois server. After i send syn packet server replies with syn/ack(then my pc send rst packet, but firewall rule …
sockets - Server doesn't send SYN+ACK - Stack Overflow
Dec 6, 2016 · I have a client and a server. They work fine when running on the same machine, but when I try connecting a client from outside my network then my server won't send the …
TCP ACK ignored, retransmission SYN ACK, why? - Stack Overflow
Feb 13, 2015 · We don't understand this TCP behavior showing that a redhat linux 5 TCP stack (HTTP server, this is where this dump is from) received an ACK for a SYN,ACK but continues …
sockets - Why does the server application send RST after having …
Feb 11, 2019 · However, in some situations (most likely due to ungraceful socket disconnection like system shutdown on client side or crash), the client will not be able to reconnect to the …
Wireshark - TCP SYN, SYN ACK and acknowledgement number …
Apr 27, 2021 · I want to know the raw sequence number from the segment TCP SYN (1), the raw sequence number from the SYN ACK (2) and the acknowledgement number from the server …
linux - TCP: Server sends [RST, ACK] immediately after receiving …
The logs show that Host_A sends a [SYN] flag to Host_B in order to establish connection. But instead of [SYN, ACK] Host_B responds with an [RST, ACK] which resets/closes the …
Why is ACK = 1 and not 2 in first TCP request after connection ...
Aug 20, 2015 · Therefore, the second packet [SYN, ACK] does increase the Sequence Number by 1, but the third packet [ACK] does not affect the Sequence Number, which is the reason …
TCP Network - Manually program SYN, SYN ACK, ACK?
Dec 14, 2016 · The user program is not required, nor is it able, to send the initial SYN, SYN-ACK, ACK handshake packets. The initial SYN is sent on behalf of the client as a consequence of …