# 172.17.0.0 netmask 255.255.0.0 and ip address 172.17.2.105 **URL:** \ **Category:** Product support\ **Created:** [March 4, 2021, 11:00am UTC](https://forums.balena.io/t/172-17-0-0-netmask-255-255-0-0-and-ip-address-172-17-2-105/265880 "2021-03-04T11:00:38Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Razikus](https://avatars.discourse-cdn.com/v4/letter/r/e19b73/32.png) [@Razikus](https://forums.balena.io/u/Razikus)\ **Post date:** [March 4, 2021, 11:00am UTC](https://forums.balena.io/t/172-17-0-0-netmask-255-255-0-0-and-ip-address-172-17-2-105/265880/1 "2021-03-04T11:00:38Z")
Hello We had encounter a strange problem with networking. Because of our client has ip address range 172.17.2.0/24 device has ip 172.17.2.105 obtained via dhcp The problem is that he cant access http of the service Unfortunately balena engine has default bridge 172.17.0.0/16, and probably this is a problem here Is there any option to change default bridge netmask? ---
**Author:** ![zvin](https://avatars.discourse-cdn.com/v4/letter/z/a5b964/32.png) [@zvin](https://forums.balena.io/u/zvin)\ **Post date:** [March 5, 2021, 4:15pm UTC](https://forums.balena.io/t/172-17-0-0-netmask-255-255-0-0-and-ip-address-172-17-2-105/265880/4 "2021-03-05T16:15:41Z")
Hello @razikus Can you try adding a `networks` section configuring `ipam` in your docker-compose file like this [balena-intel-nuc-override-defaultnet/docker-compose.yml at master · dt-rush/balena-intel-nuc-override-defaultnet · GitHub](https://github.com/dt-rush/balena-intel-nuc-override-defaultnet/blob/master/docker-compose.yml) ? See [Compose file version 2 reference | Docker Documentation](https://docs.docker.com/compose/compose-file/compose-file-v2/#ipam) ---
**Author:** ![Razikus](https://avatars.discourse-cdn.com/v4/letter/r/e19b73/32.png) [@Razikus](https://forums.balena.io/u/Razikus)\ **Post date:** [March 17, 2021, 2:34pm UTC](https://forums.balena.io/t/172-17-0-0-netmask-255-255-0-0-and-ip-address-172-17-2-105/265880/6 "2021-03-17T14:34:50Z")
It works. Thank you very much!