Issue Not able to access plesk server or any website on it

[Ihtshama]

Dear Support
Since last two days, i am not able to access Plesk server and any of the website hosted at this server from my LAN internet. But at second computer on same LAN, i can. Similarly, when i connect my PC with mobile internet, i can access everything.
Can you please advise what could be the issue?

Plesk Obsidian, V 18.0.32, CentOS Linux 7.9.2009

thank you.

 

[Monty]

Did you check your fail2ban logs to see if your IP was maybe banned by fail2ban?
Do you see your IP listed in the output of iptables -nvL ?

If yes, then you maybe should whitelist your IP in the fail2ban configuration and also check why your IP was banned in the first place.

Edit: Have a look at the great explanation by @trialotto here in this post: Resolved - Fail2Ban bans me(admin) way too often.

 

[Ihtshama]

Hi Monty, thank you for your reply. I think IP address of the server or hosted websites has not issue becuase when i connect my PC with mobile internet, same website starts opening. That means, maybe, my network adaptor has some problem maybe?

 

[Martin Dias]

If only one connection has the problem and changing network helps, then probably the IP where you have the issues did get banned as explained by Monty.

 

[Ihtshama]

@Monty thanks a lot Arashi.
I checked with Monty's method and did not find the IP address of my LAN in that list. I dont know how it all changed. Maybe someone can advise something else too.
Thank you

 

[Ihtshama]

@Monty thanks a lot Arashi.
I checked with Monty's method and did not find the IP address of my LAN in that list.

But as i said on same LAN, same IP address, at other laptop, i am able to open the websites. Then that means, only my laptop has the problem. Also, i can open sites on my laptop with other mobile internet, and this statement goes against the first one, that maybe my computer has some DNS issue.

 

[Monty]

Well in that case you'll have to do some basic network and DNS troubleshooting on both of your computers:

• Do you get the same IP address when you perform a DNS lookup on both computers?
• Can you ping that IP from both computers?
• Can you connect to ports 80, 443 and 8443 of that IP from both computers?

Once you've completed those tests you'll have a clearer picture of what the problem is...