![]() I think some sort of security setting is preventing the computer from connecting to the internet properly. Setting for outbound connections on Windows Firewall is "Allow (Default)" on all network profiles Windows Firewall log shows that outbound connection to on port 443 has been dropped I have updated the firmware/bios and NIC drivers to the latest version, and turned off windows firewall completely, but the problem still persists.R1 is connected to the Microsoft Loopback adapter (C1), and R2 is connected to the normal Ethernet adapter (C3) as shown in the topology below. The same host also runs a VMWare Ubuntu 10.0.04 guest. TCP connection on port 443 to can not be made A single instance of GNS3 runs on a Windows 7 Enterprise host.I am able to resolve to an IP address, so this is not a DNS issue.Connection attempts from this server to other servers using these clients also work. Connection attempts into this server from outside, using the same clients, work. The router interface and cloud´s interfaces are in the same subnet. is there a way to restart Software Loopback Interface without restarting windows to reproduce: route delete 127.0.0.1 0.0.0.0 if 1 route add 127.0.0.1 0.0.0.0 if 1 ping 127.0.0.1 output (tested on win11): Pinging 127.0.0.1 with 32 bytes of data: General failure. To clarify, this cloud is connected to a router in GNS3 however, I am unable to ping the router interface with the loopback even though I can ping the loopback from cmd in my computer. I configured a loopback interface in a GNS3 cloud. When using the Broadcom Control Suite, I can successfully ping the ISP address but the diagnostic tests show a MAC and PHY Loopback Test failure. I uninstalled the ethernet software and reinstalled it. Test-Netconnection -port 443 in PowerShell shows that, the /etc/hosts file contains a line: 127.0.0.1 localhost so localhost should be a valid hostname, but any attempt to connect to a port on localhost fails, including ping. ICMP issue with a KM-TEST loopback and GNS3. Broadcom 440x 10/100 Integrated Controller. Ipconfig information shows that I'm on the correct subnet, but when I try to ping any IP address, such as my local gateway ( 192.168.1.1), cmd immediately gives "General Failure" output. But if I try to browse to a website I'm told that there is no internet connection. I receive IP address from the router and according to the network icon in the notification center I'm connected to the internet just fine. In this case, it actually occurred on multiple hosts due to identical configuration, but that’s not the same as an issue caused by the interaction of multiple nodes. Other devices connected to the same router are working just fine, and I have connectivity issues regardless of using wired or wirelss LAN. Beginner Options 03-22-2014 01:03 AM - edited 03-07-2019 06:48 PM Hello, I have configured two switches with loopback interfaces (both on same subnet). Seeing the failed loopback adapter ping narrowed the issue down to an issue directly impacting layers 1-3(or maybe 4) of the host adapter, specifically. My laptop is running Win11 22H2, and suddenly today at 1:30 pm I lost connectivity with the internet.
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