Tag: ICMP
Slow Internet link with wrong MTU size in the ISP backbone
So slow Internet connection after scheduled maintenance on upstream provider(ISP). It could be multiple reasons such as software issue, hardware failure, bad patch cable ,…
Why constant packet losses in ISPs backbone?
Tweet I am currently seeing constant packet losses on my traceroute. However, you would get an answer from your ISP tech support; "We don’t see…
How traceroute (Tracert)works?
Tweet Traceroute(on window system, command will be "Tracert") is a most common and essential troubleshooting tool for network administrators. Even normal users who are facing…
How to hide an access-list applied?
Tweet Sometime, you even don’t want to reply ICMP unreachable message response back to requester. It’s very simple. Here is how you do it. (Assume…
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