Routers and DNS - sgml/signature GitHub Wiki
- ping the IP address of your current DNS with an explicit MTU
- test with a packet size of 50 less than the MTU
- repeat with a lower MTU if there is packet loss
- keep repeating, lowering the MTU by 50 each time until there is no packet loss
- save the MTU on the router and/or modem
- ping example.com with the new MTU
- repeat as before until there is no packet loss
- trace the route to each DNS server based on these lists:
- Set the DNS servers to the ones with the lowest number of hops
- Manually set the DNS server on the client to fail fast
- Reset TCP/IP
- Ideal: 950
- Export all settings
- Do a factory reset periodically, then import the old settings
- Use traceroute and ping regularly, and never expect one setting to rule them all
- Use 5Ghz to extend 2.4Ghz since 5Ghz has more range
- Use an older router as an access point hub for all wired connections
- DO NOT override DHCP servers on a device by device basis
- Fix DHCP issues by doing a factory reset, rather than turning DHCP off
- Find the endpoint URL
- Google: lens.meet.l.google.com
- Run ping and traceroute
- Update DNS to reduce the number of hops to 12 or less
- https://support.zoom.com/hc/en/article?id=zm_kb&sysparm_article=KB0060548
- https://support.zoom.com/hc/en/article?id=zm_kb&sysparm_article=KB0063568
- Cut RTS in half 2346 / 2 = 1173, then retest
- Cut RTS in a third 2346 / 3 = 782, then retest
- If download speed is unaffected, reset to 2346
- Set Beacon to the min, then retest
- Set Beacon to the max, then retest
- If download speed is unaffected, then reset to the default
- Set DTIM to double 1 * 2 = 2, then retest
- Set DTIM to quadruple 1 * 4 = 4, then retest
- If download speed is unaffected, reset to 1
ping -c 4 -M do -s 1500 208.201.224.33 ping -c 4 -M do -s 1400 208.201.224.33 ping -c 4 -M do -s 1300 208.201.224.33 sudo ip link set dev wlp1s0 mtu 1200
ipconfig /flushdns ipconfig /registerdns ipconfig /release ipconfig /renew netsh int ip reset netsh winsock reset c:\winsocklog.txt
- Network Time Protocol
- https://www.speedguide.net/speedtest/results.php?test=1724247115
- https://www.speedguide.net/speedtest/results.php?test=1712982927
- https://wiki.dd-wrt.com/wiki/index.php/Advanced_wireless_settings
- https://www.ibm.com/blog/using-dig-trace/
- https://docs.oracle.com/en-us/iaas/Content/DNS/Tasks/testingdnsusingdig.htm
- https://www.baeldung.com/linux/dns-speed-test
- https://netbeez.net/blog/testing-packet-loss/
- https://www.xfinity.com/support/repair/internet
- https://speedtest.xfinity.com/
- https://webrtc.github.io/samples/
- https://webrtc.github.io/test-pages/
- https://www.tp-link.com/us/support/faq/2584/
- https://www.tp-link.com/us/support/faq/1482/
- https://www.tp-link.com/us/support/download/archer-ax50/#FAQs
- https://www.baeldung.com/linux/maximum-transmission-unit-change-size
- https://netbeez.net/blog/network-performance-analysis/
- https://netbeez.net/blog/linux-network-path-analysis-mtr/
- https://humanwhocodes.com/blog/2024/05/someone-temporarily-took-over-subdomain/
- https://www.ibm.com/topics/primary-dns
- https://www.catchpoint.com/dns-monitoring/slow-dns
- https://public-dns.info/
- https://www.makeuseof.com/what-is-mac-binding-how-does-it-work/
- https://www.tp-link.com/us/support/faq/170/
https://www.xfinity.com/support/status
https://www.xfinity.com/support/statusmap
http://ftp.hp.com/pub/networking/software/06-C03-RadioPortConfig.pdf
https://www.guidetotcpip.com/wp-content/uploads/files/Appendices/tcpip5e_CommandLineIPUtils.pdf
https://techwiser.com/how-to-reset-tcp/
https://www.dslreports.com/forum/r32534903-DSL-I-solved-my-high-latency-problem-created-by-frontier
http://www.linux-magazine.com/Issues/2014/161/Security-and-SOHO-Routers
http://screenshots.portforward.com/
https://en.wikipedia.org/wiki/Uniregistry
http://ptgmedia.pearsoncmg.com/images/9780789753342/samplepages/9780789753342.pdf
http://www.gadgetvictims.com/2016/10/who-else-is-watching-your-ip-cameras.html
https://blog.cloudflare.com/understanding-the-prevalence-of-web-traffic-interception/
https://docs.microsoft.com/en-us/previous-versions/tn-archive/dd261764(v=technet.10)
https://blog.webernetz.net/cisco-anyconnect-ipv6-access-through-ipv4-vpn-tunnel/
https://thebestvpn.com/chrome-extension-vpn-dns-leaks/
https://www.linksys.com/sg/support-article?articleNum=142456
http://www.tcpipguide.com/content.htm
http://www.l-com.com/content/Article.aspx?Type=L&ID=467
https://www.mathworks.com/help/wlan/gs/what-is-wlan.html
http://www.dtic.mil/dtic/tr/fulltext/u2/a420632.pdf
http://www.dtic.mil/dtic/tr/fulltext/u2/a497761.pdf
http://www.au.af.mil/au/awc/awcgate/cst/bh_peacock.pdf
https://ws680.nist.gov/publication/get_pdf.cfm?pub_id=33178
http://www.dtic.mil/dtic/tr/fulltext/u2/a480069.pdf
https://share-ng.sandia.gov/news/resources/releases/2006/images/wireless-fingerprinting.pdf
https://www.debian.org/doc/manuals/debian-reference/ch05
http://www.ni.com/white-paper/12558/en/
https://superuser.com/questions/876301/cascading-routers-lan-to-wan-and-dns
https://superuser.com/questions/978667/static-dns-when-connected-to-vpn-loses-internet-connection
https://superuser.com/questions/1288878/dns-server-unreachable-from-one-client
https://technet.microsoft.com/pt-pt/library/cc772774(v=ws.10).aspx
https://tools.ietf.org/html/rfc1034
https://tools.ietf.org/html/rfc2136
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.479.9416&rep=rep1&type=pdf
https://support.apple.com/en-us/HT202944
https://openconnect.netflix.com/en/network-configuration/
https://docs.aws.amazon.com/workspaces/latest/adminguide/workspaces-port-requirements.html
https://corporate.comcast.com/images/Comcast_Innovation_Fund_-_2016_Annual_Report_PKlPHJY.pdf
https://business.comcast.com/help-and-support/internet/comcast-business-ip-gateway-static-firewall/
https://www.xfinity.com/support/articles/run-traceroute-command
https://support.xbox.com/en-US/xbox-360/networking/network-ports-used-xbox-live
https://frontier.com/helpcenter/categories/categories/internet/get-rid-of-problems#/collapse3
http://shouldiblockicmp.com/ 33001
https://www.getcujo.com/wp-content/uploads/2016/04/CUJO_Manual_Instructions.pdf
https://www.tp-link.com/us/support/faq/
https://community.spiceworks.com/how_to/1014-how-to-convert-a-wireless-router-into-an-access-point
https://support.google.com/wifi/answer/6277579
https://support.apple.com/en-au/HT202068
https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/network-wireless.html
https://tools.ietf.org/id/draft-perkins-intarea-multicast-ieee802-03.html
https://tools.ietf.org/id/draft-ietf-mboned-ieee802-mcast-problems-01.html
https://dri.es/files/wlan-faq.html
https://link.springer.com/content/pdf/bbm%3A978-1-4020-5397-9%2F1.pdf
http://ftp1.digi.com/support/documentation/0190170_b.pdf
https://mentor.ieee.org/802.15/dcn/12/15-12-0600-00-0l2r-l2r-november-2012-tutorial.pdf
https://arxiv.org/pdf/1601.00028.pdf
http://www.nyu.edu/classes/jcf/CSCI-GA.2262-001_fa13/slides/session5/WirelessAndMobileNetworks.pdf
https://www.methodist.edu/sites/default/files/ctools/CompTIA_Network_N10-005.pdf
http://ridl.cfd.rit.edu/products/manuals/IPCam/IP%20CAM%20%20UM.pdf
https://www.redbooks.ibm.com/redbooks/pdfs/gg243376.pdf
https://docs.oracle.com/cd/E52521_01/doc.420/910-5411-001_rev_c.pdf
https://ruckus-www.s3.amazonaws.com/pdf/wp/wp-how-interworking-works.pdf
http://www.sanog.org/resources/sanog17/sanog17-wifi-wimax-tanim.pdf
https://www.silabs.com/documents/login/presentations/WiFi-technology.pdf
https://www.gsma.com/newsroom/wp-content/uploads/TS.22_v5.0.pdf
https://www.arris.com/globalassets/resources/white-papers/arris_quest_4k_video_over_wi-fi_wp.pdf
https://www.savvius.com/networking-glossary/wireless_lan_overview/wlan_packets/
http://www.practicallynetworked.com/networking/fixing_double_nat.htm
https://devblogs.microsoft.com/scripting/use-powershell-for-network-host-and-port-discovery-sweeps/
https://superuser.com/questions/45687/how-can-i-ping-a-range-of-ip-addresses-simultaneously
https://serverfault.com/questions/153776/nmap-find-all-alive-hostnames-and-ips-in-lan
https://superuser.com/questions/805621/test-network-ports-faster-with-powershell
https://davidhamann.de/2017/09/27/vpn-connect-to-server-same-subnet/
- https://portforward.com/nat-types/
- https://www.mbreviews.com/how-to-change-nat-type/
- https://support.xbox.com/en-US/help/hardware-network/connect-network/xbox-360-nat-error
- https://support.xbox.com/en-US/help/hardware-network/connect-network/xbox-one-nat-error
- https://openwrt.org/docs/guide-user/network/wan/dmz-based-bridge-mode
- https://openwrt.org/docs/guide-user/network/switch_router_gateway_and_nat
- https://www.dslreports.com/forum/r31600056-Vantage-Help-with-Arris-nvg443b-bridge-mode?search=%22Cascaded%20Router%22%20443b
- https://www.cisco.com/c/en/us/support/docs/voice-unified-communications/spa8000-8-port-ip-telephony-gateway/108670-pqa-108670.html
- https://nerdbacon.com/router-to-wireless-bridge/
- https://nerdbacon.com/convert-router-to-bridge-v4/
- https://www.tp-link.com/us/support/faq/717/
- https://www.cnet.com/home/internet/how-to-turn-an-old-wi-fi-router-into-an-access-point/
- https://lifehacker.com/how-to-extend-your-wi-fi-network-with-an-old-router-915783308
https://support.ooma.com/home/advanced-connections-and-service-ports/
https://help.webex.com/en-us/b2exve/Port-Reference-for-Cisco-Webex-Calling-Value-Added-Resellers
https://help.webex.com/en-us/WBX264/How-Do-I-Allow-Webex-Meetings-Traffic-on-My-Network
https://www.dslreports.com/forum/r32629626-Price-I-just-don-t-get-it~start=30
http://www.dslreports.com/faq/15643