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I could give you a list of all header fields in the IP header. And for each header field, I could explain that ping and traceroute might use different values for that field. And that the other end of the connection might filter traffic based on the value of that header field. That would however not be a very helpful answer. Instead I'll suggest you inspect ...


Most probably the pong from ping is blocked/gets discarded, while traceroute uses an error message form a node/hop to determine the route. Traceroute is not a standard tool, in that it uses a trick to get the information. The trick is to manipulate the TTL, so the hop responds with an ICMP error (ICMP TTL exceeded), and that is why this is possible.


Something during the VirtualBox setup had changed my /etc/sysconfig/network-scripts and stopped the nameservers setting correctly. To resolve this I turned off Network Manager /etc/init.d/NetworkManager stop /sbin/chkconfig NetworkManager off Added NM_CONTROLLED="no" to /etc/sysconfig/network-scripts/ifcfg-eth0 and manually edited /etc/resolv.conf ...


Does anybody know how I might begin to troubleshoot this? You know, the usual stuff from the sysadmin kitbag Use your console access to check your logs and take appropriate action. check you have correctly configured network interfaces check your firewall. check that sshd is running check your change/config management system for other recent stuff ...


ping and curl are trying to get an actual IP address but the answer to the resolution jenkins-deb-builder.service.search.km is a CNAME ( mailtest-4.dev.search.km ) and that canonical name doesn't resolve to an IP address, that's why those tools cannot get an IP address. If Consul is able to resolve mailtest-4.dev.search.km then maybe you should modify your ...


Bandwidth and delay are different, but not completely unlinked. While it's basically true, things are not black and white. There are a lot of shades of grey in between. It's true that having a larger bandwidth doesn't necessarily means having lower delays, and it doesn't necessarily means having the same or higher delays. We should remember that it depends ...


Do these commands work if you try and run them from the command line in Windows\System32? Make sure %SystemRoot%\system32; is in your PATH environmental variable (system properties -> advanced -> environment variables -> path).

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