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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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Can't connect to specific IP address and/or TCP port - can the ISP be blocking it?

I have a RDP user who has successfully been using RDP from his laptop to his workstation in our office when he is at home. It is configured to use our public IP and port 10378 and has been working fine until about 2 weeks ago when it just stopped…
Reece
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Windows 2003 dynamic ports rellocation

After digging the internet for a way to relocate the dynamic ports start number and range... I found the following registry settings... HKLM\Software\Microsoft\Rpc\Internet (Key) \UseInternetPorts="Y" (REG_SZ) \PortsInternetAvailable="Y"…
ZEE
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Debug ISP connection issue (Pfsense bogon network list out-of-date)

I have access to the office from outside (VPN, e-mail, etc.). I have at home Internet from ISP(A) and at office from ISP(B). Everything were working fine till I received an e-mail from my ISP(A) that they needed change my public IP. From that moment…
HEDMON
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Not able to access host machine from VM

I am not able to access the host machine through the VM. And vice-versa. The networking type of VM is bridged. If I set the type to NAT then I wont be able to access internet. Also I have disabled the firewall on host and the vm. How can I solve…
dattebayo
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Irresponsive nginx while doing “nginx reload”

While reloading nginx, I started getting errors in messages log "possible SYN flooding on port 443", and it seems like nginx becomes completely irresponsive at that time (quite for a while), cause zabbix reports "nginx is down" with ping 0s. RPS at…
d.ansimov
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Windows server 2008 R2(standard) client connection is very slow after connecting above 24 client machines? Is there any client connection limit?

Windows server 2008 r2 standard is connecting 24 cilent machines after while adding extra machines to server it gets slow. In Windows server 2008 r2 maintaining the mysql database and all other client machines are pointing to mysql database server.…
keerthi
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Why does one of my LAN servers frequently require 21 seconds to connect?

Using a mix of Windows 7 and Windows 10 clients, one of my LAN servers tends to take 21 seconds to establish a connection. This LAN server is running Windows Server 2012-R2 and hosting TFS 2015 on IIS port 8080. Playing with Fiddler reveals that…
Brian
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Two subnets on one LAN

I have a simple 192.168.1.x/24 LAN GW & DNS = 192.168.1.254 My workstation is 192.168.1.101 I wish to setup a parallel mirror LAN for testing using a 192.168.10.x/24 subnet on the same switch. Question 1 Can computers on the testing LAN use the…
Dercni
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How to I diagnose downloads slowing over time?

I am trying to track down a strange networking problem. Basically, a http download from a tomcat server is slowing down over time. For example, the download speed starts at 700kb, then slows to 650, 600, 550, 500, etc. I have heard TCP/IP windowing…
GC_
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Static IPs and New Domain Controller and Domain within existing Forest

I have a forest domain chicago.example.com that contains 2 domain controllers in it, in which I had joined a 2012 Server to the forest domain called DOMAINCONTROLLER3. I plan to promote this server to a domain controller in a new domain DOMAIN2. It…
Kevin
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TCP/IP - why does routing without masquerading work?

I thought a data packet from another subnet is always rejected. But when I have two hosts (h1 and h2) in two different subnets (s1 and s2) and one router (r) with activated ip_forward and access to both subnets, I can ping h1 from h2. I understand…
Wotim
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TCP connection not established: Can't Connect to MySQL Server on Remote Connection (10060)

I'm running MySQL 5.6 on a WinServer 2012 system. It works great. The server is on our office intranet, not accessible to the outside world. I normally administer MySQL remotely from my office on my laptop, so I've got my user privileges set to…
Jonathan M
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Web application access permission

I have a web application that uses SQL server . SQL server is hosted on a server and accessed using port 1433 . My question is will the user who is accessing my application required to be able to establish the communication with the port 1433 .…
Momo
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Can't communicate out of VM instance for Modbus TCP/IP over port 8080 - routes poosibly required

I have used Google Cloud Developers Console to set up a Windows 2012 Server. I am trying to use this a web server for monitoring hardware utilising Modbus TCP/IP. I have installed a SCADA software package which uses port 8080 on the Windows Server…
D.M.M.M
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Static ip addressed hardware unreachable

I need help, I have multiple things (NAS box's and the like) on a static 10.10.10.x network. My new situation forced me to use an Air Card on one laptop and using Internet connection sharing to allow the other computers access to the Internet.…
Sam
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