IP Change Today

[AtlBo]

I use a small GitHub app called IP Monitor to check for IP changes. It lets me know if it ever changes. I have been using the app for about 4-5 months and never had the IP change until today. Today I noticed it changed from the long standing one to a new one, and I was wondering if this is normal and also what might cause the change. The log says it happened at 11:50 here or about 5 hours ago, and I wasn't doing anything special at the time. Must have been away when the tray pop up went off because I never did see an alert for the change...just happened to check...

 

[Local Host]

This is normal as most ISPs supply dynamic IPs for personal use, only companies that tend to have static IPs.

 

[ForgottenSeer 72227]

I agree its normal. I see it too every so often as well. Every ISP may be different in terms of when they decide to change the IP address, but it's common practice.

 

[yitworths]

I use a small GitHub app called IP Monitor to check for IP changes. It lets me know if it ever changes. I have been using the app for about 4-5 months and never had the IP change until today. Today I noticed it changed from the long standing one to a new one, and I was wondering if this is normal and also what might cause the change. The log says it happened at 11:50 here or about 5 hours ago, and I wasn't doing anything special at the time. Must have been away when the tray pop up went off because I never did see an alert for the change...just happened to check...

are you talking about your WAN ip? If yes,then most probably it's ok.

You can check those ip addresses' registration.... Just do a web search with those ip

 

[AtlBo]

are you talking about your WAN ip? If yes,then most probably it's ok.

You can check those ip addresses' registration.... Just do a web search with those ip

Thx for the answers . It's the WAN address, so it sounds like it's fine. First time I have ever tracked it on a PC...

BTW, I just checked and sure enough it shows up from the proper ISP as a reassigned IP number. I guess maybe they expect a check after a change and use the designation to indicate the change. Thx again...

 

[ForgottenSeer 58943]

I use a small GitHub app called IP Monitor to check for IP changes. It lets me know if it ever changes. I have been using the app for about 4-5 months and never had the IP change until today. Today I noticed it changed from the long standing one to a new one, and I was wondering if this is normal and also what might cause the change. The log says it happened at 11:50 here or about 5 hours ago, and I wasn't doing anything special at the time. Must have been away when the tray pop up went off because I never did see an alert for the change...just happened to check...

How it works is, most ISP's trigger a reservation refresh toward the end of the billing cycle. At which time if your modem doesn't respond to a drop and push they will trigger a refresh on the DHCP IP on the WAN with the assumption you don't have statics.

This is entirely normal.

 

[AtlBo]

Clever and good to know. Wondering how many issues like this there must be for network managers to oversee, set up for, etc. :emoji_flushed:. Must be 1000s, and I confess I don't know how they find memory capacity for keeping track of it all. Thx for the knowledge ...

 

[ForgottenSeer 58943]

Clever and good to know. Wondering how many issues like this there must be for network managers to oversee, set up for, etc. :emoji_flushed:. Must be 1000s, and I confess I don't know how they find memory capacity for keeping track of it all. Thx for the knowledge ...

In general businesses have static IP assignments. Usually 3-5 minimum. So monthly billing pushes and reservation clears don't impact them. What happens at each billing cycle is they see who is 'active' and if someone isn't responding they pull the reservation, push a new one, and do a signal pump on the modem to bring it into compliance. Also this pushes out the configuration to ISP owned routers, etc. In the process this 'knocks' anyone stealing their signal off the network.

For appliances such as Fortigate's on a business network with DHCP (ugh), we use FortiDDNS which automatically refreshes itself when the WAN IP changes. This allows business continuity in the event of such matters. I've worked as an engineering consultant for a couple of cable companies/ISP's and used to be CEO/Owner of an ISP that I sold off to a bigger ISP. Anyway, lately with my existing ISP who I can get free services from I got so tired of monthly billing cycle pushes on my 'free' connection that I told them to start charging me to avoid it. So now I pay for my connection, and don't get knocked off and have to call over to the NOC to get my config manually pushed. Sometimes free isn't worth free.

 

[McLovin]

It happened to me a while ago. I wanted a static IP address from my ISP and then I noticed one day as well that the IP had changed, to find out that they had moved my ISP server to a different location so that would of been why I had a different IP address.