There are lots of useful sites which helps the troubleshooting procedures. I listed some common tools or websites used by myself. Please let me know what you are using and I would like to try them and add them into this list.
1. Internet/Network Tools Portal
Ping – Shows how long it takes for packets to reach host
Traceroute – Traces the route of packets to destination host from our server
DNS lookup – Look up DNS record
WHOIS – Lists contact info for an IP or domain
Port check – Tests if port is opened on specified IP
Reverse lookup – Gets hostname by IP address
Proxy checker – Detects a proxy server
Bandwidth meter – Detects your download speed from our server
Network calculator – Calculates subnet range by network mask
Network mask calculator – Calculates network mask by subnet range
Country by IP – Detects country by IP or hostname
Unit converter – Converts values from one unit to another
DNS checks detailed dns information for a hostname ( www.facebook.com , www.yahoo.com , www.youtube.com )
IP-number checks ip number information such as dns reverse and forwards
route checks a specific routed prefix
AS numbers checks information on an AS-number
AS macros checks who belongs to an AS-macro
2. Speed Test
- http://www.speedtest.net/
- http://speedcheck.rogers.com/en.html
- iperf from http://sourceforge.net/projects/iperf/
3. IP Subnet Calculator
4. Network Monitoring Related
- http://www.monitor.us – Free all-in-one IT systems monitoring from the cloud
- Uptime Robot – It monitors your websites every 5 minutes and alerts you if your sites are down
- http://www.paessler.com/prtg – free 100 sensor to monitor your network devices. Remote probe works great.
- Solarwinds NPM
- OpManager from ManageEngine
5. DNS and Domain Name Related
- http://www.dnsstuff.com/
- http://my-addr.com/
- https://www.whatsmydns.net/
- http://www.cloudflare.com – protects and accelerates any website online. CloudFlare is designed to accelerate and secure any website.
- http://whois.domaintools.com/ – is the leader in domain name, DNS and Internet OSINT-based cyber threat intelligence and cybercrime forensics products and data.
6. BGP Toolkit
- http://bgp.he.net/
- http://routeserver.org/ (telnet into live BGP Routers and Check BGP table, if see BGP routing information is help you to isolate an issue you are facing. )
Choose any one of servers by clicking the spot and it will bring you to this kind of link: telnet://route-views.on.bb.telus.com
route-views.ab>show bgp paths 47102
Address Hash Refcount Metric Path
0x666C2980 2421 0 0 852 3257 4436 23498 47102 47102 i
route-views.ab>sh ip bgp 199.xxx.xxx.0
BGP routing table entry for 199.xxx.xxx.0/24, version 82108513
Bestpath Modifiers: deterministic-med
Paths: (1 available, best #1)
Not advertised to any peer
852 3257 4436 23498 47102 47102
154.11.98.17 from 154.11.98.17 (154.11.0.71)
Origin IGP, localpref 100, valid, external, best
Dampinfo: penalty 1304, flapped 4 times in 00:14:31
route-views.ab>show bgp paths 47102
Address Hash Refcount Metric Path
0x666C2980 2421 0 0 852 3257 4436 23498 47102 47102 i
route-views.ab>sh ip bgp 199.xxx.xxx.0
BGP routing table entry for 199.xxx.xxx.0/24, version 82108513
Bestpath Modifiers: deterministic-med
Paths: (1 available, best #1)
Not advertised to any peer
852 3257 4436 23498 47102 47102
154.11.98.17 from 154.11.98.17 (154.11.0.71)
Origin IGP, localpref 100, valid, external, best
Dampinfo: penalty 1304, flapped 4 times in 00:14:31
7. Your Public IP Address
8. Online Diagram Drawing Sites
- Gliffy :Online network diagram drawing website
- Another useful online visio drawing site is Lucid Chart.
- https://www.draw.io/
- http://asciiflow.com/
9. Snmp tools
10. HTTP and HTTPS Check Tools
- http://www.alertra.com/articles/spotcheck_info/ Spot Check™ provides an easy way to demonstrate how we check from multiple locations and is also a good way to assess the current status of a Web server. The text or other data specified by the URL is loaded according to RFC 2616 (HTTP/1.1). Both HTTP and HTTPS (SSL over HTTP) protocols are supported.
- http://www.sslshopper.com/ssl-checker.html
- http://achecker.ca/checker/index.php
- http://www.webpagetest.org/
- https://www.browserling.com/ – Test website using different platform and broswer version.
11. Email Diagnostic Tools
- http://mxtoolbox.com/
12. Proxy Sites
- http://www.vtunnel.com/
13. Remote Support / Online Meeting
- http://www.packetix.net/en/secure/install/
- Teamviewer
- Ammyy Admin
- Sunlogin
- join.me
- Cisco WebEx
- http://www.spreed.com/
- http://vyew.com/
14. Remote (SSH / Telnet) Access Tools
- PuTTY: a free telnet/ssh client – chiark home page
- SecureCRT from Vandyke
- Poderosa from SourceForge
- More from http://alternativeto.net/software/securecrt/
15. NTP Server
16. Portable Software
Before you click away to do some heavy network security reading, please leave a comment and share your favourite network and security tools so that I can add them to my list!
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Hi,
good tools mentioned here. Could you please fix the link to Meinberg NTP, there is some gibberish at the end of the linktext: ntp.html_RA&sig2=ovxYla8mzzDEHx7UN_HOlw
thx