OK I should caution thst if he's likely to be looking at the logs himself he may well notice you've logged into the router, as it may leave a trail on the router - do you really think he's checking you on the router logs?
Anyway if you want to see the logs you need to
- Find out your router's IP address
By default, most router manufacturers use 192.168.0.1 or 192.168.1.1
Try these two first - copy and paste router IP address into your browser (in the address bar where you usually type a Web address)
- You should be at a log in screen. If not Google "what is my router IP" and investigate to find out.
3.You need to find out the username and password.
Most people leave their router with default settings. You need to find out what yours are. You could try these (in any order)
a. For username / password try:
admin / admin - especially if on Talk Talk
or (blank) / admin
or (blank) / (blank)
b. Look at your router and see if it has the admin password on a sticker on it (note this is NOT the same as the network password that you use to access the WiFi)
c. Find out your router model - probably written on your router - and Google what is the admin password for your router, or use this site www.routerpasswords.com
d. If there is no model number Google default admin passwords for your internet service provider, if they supplied your router (eg Talk Talk / BT / Sky etc) or for the router brand
e. If all else fails maybe call your ISP and ask them what the password for accessing the router is.
If you can't get your password then you're stuck! But most are on the default setting AFAIK
- Once you're in, look around to try to find the logs. Don't change anything at this point! Just have a look. It will probably be a downloadable file although it could be a list on a page. And it probably won't be set up to record all URLs already, but worth checking just in case
- If it's not already set up to show all URLs, then follow these instructions.
www.howtogeek.com/68886/
Disclaimer - I got as far as step 4 but have not set up URL logging. My DP was acting strange with his phone (while on our wifi) and it reassured me to know I could look if I wanted to. After some consideration I don't think he is having an affair though. I think it's porn and I figured I didn't want to open that pandora's box - once i look i won't be able to unsee it - and that he's entitled to his privacy (I read erotic fiction sometimes and i'd be mortified if he knew exactly what I read!).
If I seriously thought someone I was with was cheating i'd do it in a heartbeat though.
But as others have said you don't need an excuse to leave anyway.