Troubleshooting Wired Network Connection Issues Flowchart

Local IP Addresses

Firewall / Router / Gateway: examples are 10.0.0.1, 192.168.1.1, 192.168.254.1

Modem: examples are 10.0.0.1, 192.168.1.1, 192.168.254.1

Local DNS: usually the same as your firewall / router / gateway

ISP Details

BT

Primary DNS 1: 194.72.9.34

Secondary DNS 1: 194.72.9.38

Primary DNS 2: 194.74.65.68

Secondary DNS 2: 194.74.65.69

Primary DNS 3: 194.72.0.98

Secondary DNS 3: 194.72.0.114

Primary DNS 4: 62.6.40.162

Secondary DNS 4: 62.6.40.178

BT DNS isn't pingable.

POP3: pop3.btconnect.com

SMTP: smtp.btconnect.com

Status info: 0800-1690199

Service status: http://www.btbroadbandoffice.com/help/sstatus/bb

http://btbusiness.custhelp.com

Zen Internet

Primary DNS: 212.23.6.100

Secondary DNS: 212.23.3.100

Tech support: 0870-6000-973

SMTP: mailhost.zen.co.uk

Phone Co-op

Primary DNS: 139.175.55.224

Secondary DNS: 195.10.244.152

Telephone tech support: 0845 458 9000 9am - 8pm Monday to Friday; 9am - 2.30pm Saturdays; Bank Holidays 10am - 2pm; (Closed on Sundays)

Service status page: http://www.thephone.coop/support/internet/servicestatus.html

Customer services: 0845 458 9000 9am - 8pm Monday to Friday; 9am - 2.30pm Saturdays; Bank Holidays 10am - 2pm; (Closed on Sundays)

Email: internetsuppprt@phone.coop

Dealing With Firewalls

Restart a Linux or BSD firewall / router / gateway by pressing Ctrl+Alt+Del and waiting for it to restart.

You can login using either the web browser interface or SSH.

Dealing With Modems

To restart, preferably login through the web browser interface and choose restart or reboot. If you can't login and retstart it then power cycle it but note some cheap modems standa a chance of losing their settings when you power cycle them.

It may not be enough to reboot a modem from the web browser interface to make it work, it may need power cycling.

You can login using either the web browser interface or sometimes telnet or SSH.

Dealing With Hubs

Also known as a switch. Just turn them off and back on again.