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Questions tagged [tcpip]

TCP and IP are two important protocols used in networking today. Due to their importance, the Internet Protocol Suite is also commonly known as "TCP/IP"

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Sending files via FTP without IP addresses on PC's

Can two PC's communicate with each other - FTP, without using IP addresses(entirely skipping Network Layer)? I know, FTP is client-server architecture, but I wonder if LAN network and MAC addresses are known, then technically two PC's can…
Rafal
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How does a PC determine which network adapter to use when given an IP/DNS to connect to?

I have so many network adapters on my PC. If I type for example "Ping 192.168.191.128", how does my PC now which network adapter to use? What if it's a DNS name like "mylocal.ddd.com", how does my PC now which adapter configured DNS server to look…
user1034912
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Stop attacker without affecting others on same IP

How can I stop a client that's running a multirequest script on my server that reconnects and continues no matter what, without affecting the other people/clients that are connected to my server from the same ip as the attacker? The port is…
Arre
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How to enable ECN marking in IP header in Linux

Is the ECN marking in the IP header is performed by default in Ubuntu (4.15.x kernel) or should the kernel be recompiled with a special option? I configured a RED ingress queue at an Ubuntu machine, net.ipv4.tcp_ecn is set to 1 in all hosts of the…
v1mm3r
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BT Router and Assign Multiple IP Addresses

We have bt router model: BT2700HGV , 2wire, can someone tell me if this router supports this Scenario is I have 2 webservers and want them to be available publicly , thanks update: A bit more information; I attached pictures of my router system…
Cem
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Vista machine not broadcasting DHCP device name on network

When I look on my router at 'attached devices' - I see the names of my XP machine and my Ubuntu box - but the Vista name is not there (despite seeing the IP addresses of all three connected - ie the Vista box shows as device name 'unknown'.) DHCP…
Hawkeye
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What do i need to take to connect an openvpn server to a local network?

I'm setting up an office vpn so people can work from home, by rdp'ing their office machines by connecting to a vpn server which is based on the office lan. It wont be as simple as creating a vpn server in the office and connecting every device…
AlexH
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Ping a host in other network

I have a Virtual Machine One in inner network 192.168.1.0 with ip address 192.168.1.1 and Machine Two in inner network 192.168.2.0 with ip 192.168.2.2. Both have enp0s3 interface. How could I ping 192.168.1.1 from machine with ip 192.168.2.2? I…
FuryMaxim
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Sonicwall resetting connections (For no apparent reason)

We have a Sonicwall Pro 3060 that is transparently bridging traffic to the Internet and a VPN to another site. We are having connections being reset for no apparent reason. For instance, connecting Outlook to our Exchange server at the other site.…
Josh Brower
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Is there URL filter like protocol in TCP/IP stack?

I find many type routers have their self-existent URL filter settings. Tenda: Nexxt: So, is there a URL filter protocol in TCP/IP stack? and if is, is there any software for controlling every type's router?
aircraft
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Weird behavior of VPS host

Hi I noticed strange behavior on my VPS host I launch nmap on my laptop and scan VPS host nmap screenshot Listed netstat on VPS server netstat screenshot Tried to connect to some port connection screenshot Checked tcpdump on VPS server tcpdump…
kpazik
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OVH : SSH Connections Timout after multiple connections

So i have making a control panel of sorts with php on my webserver that is able to send commands to my dedicated server (remote server) via ssh2. This works fine, however i have noticed that after a few times of it reconnecting to ssh2 it stops…
Mattigins
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Client and Server on the same Computer

I have an OPC UA Server and an OPC Client running on the same computer communicating via TCP/IP. What's the pro and cons using 127.0.0.1 vs IP address of the network card?
Andis59
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IP on different subnet mask

I'm still learning the ropes of Windows Server (specifically 2012R2). My assigned task is to setup a static local IP address, I managed to get it set to 192.168.1.96 (with subnet mask 255.255.255.0) However they need the ip to be on 192.168.2.96,…
Gaza
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Why is wireshark capturing packets not destined to my host?

My IP was configured as 192.168.101.91, I don't understand why my host is receiving packets which have a destination address of 192.168.87.203(and many other IPs which I didn't capture) given that I have already shutdown my KVM and disabled ip…
xczzhh
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