Networking and Computing Tips and Tricks

Welcome to CellStream’s Networking and Computing Tips resource center, where technology professionals, students, and enthusiasts can find practical guidance, troubleshooting techniques, and real-world solutions for today’s networking and computing challenges. Our goal is to help you work smarter, solve problems faster, and build a stronger foundation of technical knowledge.

Whether you’re configuring a network, optimizing system performance, learning a new technology, or troubleshooting a difficult issue, you’ll find valuable insights drawn from decades of industry experience. From Wireshark packet analysis and broadband technologies to Windows, Linux, cybersecurity, Wi-Fi, and Internet protocols, our tips are designed to be practical, actionable, and immediately useful.

What You’ll Find Here

• Step-by-step technical guides and how-to articles
• Networking troubleshooting techniques and best practices
• Wireshark tips, packet analysis workflows, and protocol insights
• Windows, Linux, and computing optimization recommendations
• Cybersecurity awareness and protection strategies
• Broadband, Wi-Fi, Ethernet, TCP/IP, and Internet technology guidance
• Productivity tips and tools for network engineers and IT professionals

Popular Topics Include

• Improving network troubleshooting efficiency
• Optimizing computer and operating system performance
• Securing devices, accounts, and data
• Capturing and analyzing packets with Wireshark
• Understanding TCP/IP, DNS, DHCP, Ethernet, and Wi-Fi technologies
• Using industry tools more effectively

Join the Conversation

We’re always looking for new ideas, questions, and topics to explore. If there’s a networking or computing subject you’d like us to cover, or if you need help solving a technical challenge, connect with us through our Discord community or contact us directly.

Please note that not all tips, procedures, and configuration examples apply to every operating system, network device, software version, or vendor platform. Always verify compatibility and test changes in a controlled environment before implementing them in production networks.

What Can Wireshark Really Tell You About an Encrypted Signal Conversation?

Networking and Computing Tips and Tricks / By

Views: 699Signal has a well-earned reputation as a secure messaging application. Messages, voice calls, video calls, files, and other Signal-to-Signal communications are protected using end-to-end encryption. Signal states that message and call contents cannot be accessed by Signal or other third parties because the communications are always end-to-end encrypted. So that raises an interesting Wireshark

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Why Your Wireshark Filter May Not Mean What You Think It Means

Networking and Computing Tips and Tricks / By

Views: 405Wireshark display filters can look deceptively simple. For example: tcp.port > 1024 seems obvious. But a TCP packet normally has two port values: a source port and a destination port. That means Wireshark may be evaluating more than one value when you write a filter. Consider: This packet satisfies: tcp.port > 1024 because 53000

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10 Wireshark Display Filter Functions You’re Probably Not Using

Networking and Computing Tips and Tricks / By

Views: 371Most Wireshark users learn display filters by comparing a field to a value: ip.addr == 192.168.1.10 tcp.port == 443 dns.qry.name contains “example” But modern Wireshark display filters can do much more than simple comparisons. The filter language includes functions that can measure field lengths, count repeated fields, manipulate text, compare values, and even convert

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Synchronize Two Wireshark Captures by Correcting Clock Drift

Networking and Computing Tips and Tricks / By

Views: 593I discussed correlating packet captures from multiple capture points last week. In that post, one of the things I promised was to dive deeper into clock offsets and clock drift. When troubleshooting from more than one capture point, it is common to compare traffic from places such as: Before those captures can be compared—or

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Wireshark’s Slice Operator: Search Exact Bytes Without Writing a Dissector

Networking and Computing Tips and Tricks / By

Views: 507Wireshark gives us thousands of protocol fields to filter on: But what happens when the exact information you want isn’t exposed as a field? That is where Wireshark’s Slice Operator becomes extremely useful. A slice lets you select specific bytes from a field, payload, protocol, or even the captured frame itself. For example: eth.src[0:3]

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Correlating Multiple Wireshark Captures: Follow the Same Packet Across the Network

Networking and Computing Tips and Tricks / By

Views: 706So many times I have watched YouTube videos and read articles that jump right into Wireshark troubleshooting of multiple captures of a network conversation or event from multiple points in the network. To me, that can be unnecessarily overwhelming to those learning packet capture. In many videos, it never becomes clear why two different

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sngrep: The SIP Troubleshooting Tool You Should Know

Networking and Computing Tips and Tricks / By

Views: 553If you work with VoIP, and more specifically SIP long enough, eventually you find yourself staring at an INVITE, a handful of provisional responses, several IP addresses, a 200 OK, an ACK, and perhaps a BYE—and trying to mentally reconstruct what actually happened. Wireshark can certainly do this. In fact, Wireshark remains one of

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Turn Wireshark Columns into Calculated Network Analytics

Networking and Computing Tips and Tricks / By

Views: 356Most Wireshark users eventually discover Custom Columns. Instead of being limited to the standard Source, Destination, Protocol, Length, and Info columns, you can add useful fields such as: tcp.stream tcp.analysis.ack_rtt dns.qry.name vlan.id That alone can make packet analysis much easier. But in newer versions of Wireshark, Custom Columns can do much more than simply

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The Wireshark $ Operator: Build Filters Around the Packet You Click

Networking and Computing Tips and Tricks / By

Views: 944Most Wireshark display filters use values that you type manually. For example: ip.addr == 192.168.1.100 or: tcp.stream == 14 But Wireshark has a lesser-known capability that lets you build a filter using values from the packet you currently have selected. That capability is called a field reference, and it uses the $ character. For

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The Best Auto Switch Filters for Wireshark Profiles

Networking and Computing Tips and Tricks / By

Views: 467One of the cooler features added to recent versions of Wireshark is the ability to automatically select a Configuration Profile when you open a capture file. I covered how to configure this feature in my earlier article, Automatically Switch Configuration Profiles in Wireshark. Since then, I have spent more time thinking about something that

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Our BGP Lab Series is Up

Networking and Computing Tips and Tricks / By

Views: 391Network Engineers and folks learning networking – my BGP Lab series is now available – you will find them here. There are three Labs that include GNS3 topologies, and PCAPS to emulate and capture these awesome labs. Starting with Basic, then looking at Multihop eBGP, then examining the protocol with Wireshark, then examining the

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OSPF Lab Series Now Available

Networking and Computing Tips and Tricks / By

Views: 469Network Engineers and folks learning networking – my OSPF Lab series is now available – you will find them here. There are three Labs that include GNS3 topologies, and PCAPS to emulate and capture these awesome labs: We have also begun our BGP series as well with new labs coming each week. If you

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OSPF Specifications – A Complete Library

Networking and Computing Tips and Tricks / By

Views: 520Open Shortest Path First, or OSPF, is a dynamic routing protocol used by routers to exchange information about available IPv4 and IPv6 networks. It is classified as a link-state Interior Gateway Protocol, meaning it is designed to operate within a single organization or autonomous system. OSPF allows routers to automatically learn the network topology,

OSPF Specifications – A Complete Library Read More »

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Our Comprehensive Wi-Fi Troubleshooting Guide

Networking and Computing Tips and Tricks / By

Views: 2,836Hi everyone! As many of you who have attended my conference presentations and Wi-Fi classes know, I spend time talking about the correct way of troubleshooting Wi-Fi networks. **********JUST UPDATED************* Power cycling or rebooting is NOT a first step. Here’s why: lets say you are having issues of some kind (slow speed, connectivity issues,

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Wireshark Troubleshooting Workflow

Networking and Computing Tips and Tricks / By

Views: 682Do not troubleshoot Wireshark captures by chasing random red and black packets. Start with triage, classify the traffic, branch into the correct protocol workflow, and then prove the finding with packet evidence. The following is a shortened version of our structured “Triage → Classify → Branch → Prove” Wireshark troubleshooting workflow built from your

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