Requirements
- Target platform
- OpenClaw
- Install method
- Manual import
- Extraction
- Extract archive
- Prerequisites
- OpenClaw
- Primary doc
- SKILL.md
Tencent SkillHub ยท Communication & Collaboration
Network
Understand and troubleshoot computer networks with TCP/IP, DNS, routing, and diagnostic tools.
skill openclawclawhub Free
Understand and troubleshoot computer networks with TCP/IP, DNS, routing, and diagnostic tools.
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Install for OpenClaw
Quick setup
- Download the package from Yavira.
- Extract the archive and review SKILL.md first.
- Import or place the package into your OpenClaw setup.
Package facts
- Download mode
- Yavira redirect
- Package format
- ZIP package
- Source platform
- Tencent SkillHub
- What's included
- SKILL.md
Validation
- Use the Yavira download entry.
- Review SKILL.md after the package is downloaded.
- Confirm the extracted package contains the expected setup assets.
Install with your agent
Agent handoff
Hand the extracted package to your coding agent with a concrete install brief instead of figuring it out manually.
- Download the package from Yavira.
- Extract it into a folder your agent can access.
- Paste one of the prompts below and point your agent at the extracted folder.
New install
I downloaded a skill package from Yavira. Read SKILL.md from the extracted folder and install it by following the included instructions. Tell me what you changed and call out any manual steps you could not complete.
Upgrade existing
I downloaded an updated skill package from Yavira. Read SKILL.md from the extracted folder, compare it with my current installation, and upgrade it while preserving any custom configuration unless the package docs explicitly say otherwise. Summarize what changed and any follow-up checks I should run.
Trust & source
Release facts
- Source
- Tencent SkillHub
- Verification
- Indexed source record
- Version
- 1.0.0
Provenance
- Publisher
- ivangdavila
- Source page
- View original listing
- Canonical URL
- Open canonical page
Documentation
TCP/IP Basics
TCP guarantees delivery with retransmission โ use for reliability (HTTP, SSH, databases) UDP is fire-and-forget โ use for speed when loss is acceptable (video, gaming, DNS queries) Port numbers: 0-1023 privileged (need root), 1024-65535 available โ common services have well-known ports Ephemeral ports for client connections โ OS assigns randomly from high range
DNS
DNS resolution is cached at multiple levels โ browser, OS, router, ISP โ flush all when debugging TTL determines cache duration โ lower before migrations, raise after for performance A record for IPv4, AAAA for IPv6, CNAME for aliases, MX for mail CNAME cannot exist at zone apex (root domain) โ use A record or provider-specific alias dig and nslookup query DNS directly โ bypass local cache for accurate results
IP Addressing
Private ranges: 10.x.x.x, 172.16-31.x.x, 192.168.x.x โ not routable on internet CIDR notation: /24 = 256 IPs, /16 = 65536 IPs โ each bit halves or doubles the range 127.0.0.1 is localhost โ 0.0.0.0 means all interfaces, not a valid destination NAT translates private to public IPs โ most home/office networks use this IPv6 eliminates NAT need โ but dual-stack with IPv4 still common
Common Ports
22: SSH โ 80: HTTP โ 443: HTTPS โ 53: DNS 25/465/587: SMTP (mail sending) โ 143/993: IMAP โ 110/995: POP3 3306: MySQL โ 5432: PostgreSQL โ 6379: Redis โ 27017: MongoDB 3000/8080/8000: Common development servers
Troubleshooting Tools
ping tests reachability โ but ICMP may be blocked, no response doesn't mean down traceroute/tracert shows path โ identifies where packets stop or slow down netstat -tulpn or ss -tulpn shows listening ports โ find what's using a port curl -v shows full HTTP transaction โ headers, timing, TLS negotiation tcpdump and Wireshark capture packets โ last resort for deep debugging
Firewalls and NAT
Stateful firewalls track connections โ allow response to outbound requests automatically Port forwarding maps external port to internal IP:port โ required to expose services behind NAT Hairpin NAT for internal access to external IP โ not all routers support it UPnP auto-configures port forwarding โ convenient but security risk, disable on servers
Load Balancing
Round-robin distributes sequentially โ simple but ignores server capacity Least connections sends to least busy โ better for varying request durations Health checks remove dead servers โ configure appropriate intervals and thresholds Sticky sessions (affinity) keep user on same server โ needed for stateful apps, breaks scaling
VPNs and Tunnels
VPN encrypts traffic to exit point โ all traffic appears from VPN server IP Split tunneling sends only some traffic through VPN โ reduces latency for local resources WireGuard is modern and fast โ simpler than OpenVPN, better performance SSH tunnels for ad-hoc port forwarding โ ssh -L local:remote:port creates secure tunnel
SSL/TLS
TLS 1.2 minimum, prefer 1.3 โ older versions have known vulnerabilities Certificate chain: leaf โ intermediate โ root โ missing intermediate causes validation failures SNI allows multiple certs on one IP โ older clients without SNI get default cert Let's Encrypt certs expire in 90 days โ automate renewal or face outages
Common Mistakes
Assuming DNS changes are instant โ TTL means old records persist in caches Blocking ICMP entirely โ breaks path MTU discovery, causes mysterious failures Forgetting IPv6 โ services may be accessible on IPv6 even with IPv4 firewall Hardcoding IPs instead of hostnames โ breaks when IPs change Not checking both TCP and UDP โ some services need UDP (DNS, VPN, game servers) Confusing latency and bandwidth โ high bandwidth doesn't mean low latency
Category context
Messaging, meetings, inboxes, CRM, and teammate communication surfaces.
Source: Tencent SkillHub
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Package contents
Included in package
1 Docs
- SKILL.md