The command traceroute ( x here being an IP or hostname) is the most basic version and it will begin to send packets to the designated target. The purpose of this article, after all, is that you come away with a little more knowledge about the utility that traceroute offers. Now that you can see a clear use case for traceroute, let's talk about the command itself, and what information you can get from it. Now that the nightmare was over, the tools that I used to figure out where the issue occurred were good old-fashion Telnet (which we can cover in a later article) and of course, traceroute. But it wasn't weird, because of course, they had a firewall. That is a weird position to have hired for considering that you don't have a firewall between these sites. Turns out, that after four hours of troubleshooting and reconfiguring interfaces, the customer said, "Let me get our firewall guy on the call." Internal storage firewall disabled: check. So, I ran through every check I could think of from my side. But, as all customer-facing positions go, you have to be respectful and polite. "Of course not, there is no firewall between these sites." This response was shocking considering that this was one of the largest financial institutions in the entire country. Within a half-hour of troubleshooting, I asked the client if they had a firewall at the PROD site that could be blocking traffic on the needed ports. Traffic was hitting the gateway device and being dropped. We were able to reach outside of the gateway on the DR site, but we were unable to reach outside of the PROD site. The real issue was that we were unable to get traffic moving between the two replication interfaces that we had configured. The production site was brand new, and of course, the cause of all of our problems. Old Linux commands and their modern replacements.Linux system administration skills assessment. A guide to installing applications on Linux.Download RHEL 9 at no charge through the Red Hat Developer program.
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