This discussion has been locked.

You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Working hack for eth1 DHCP client issue

Finally I took the time and got a hack working for the eth1 not getting a DHCP address from an ISP. I have posts back YEARS with things I/others have tried. I finally just hacked a cron job to renew my eth1 DHCP address every minute. This is finally a work around for a long running issue.

So... if your cable modem reboots or your ISP does maintenance, and you lose your IP on eth1...

Create a file: /etc/crontab.custom_eth1_renew

# local hacks
# run dhcpc to renew IP for eth1 interface in case of cable modem outage.
* * * * * root /var/mdw/scripts/dhcpc renew eth1

Reboot UTM

This will run the dhcpc command every minute to renew the IP address for eth1

This thread was automatically locked due to age.

0 Bob Blank over 3 years ago

BTW - here is an original thread with several other options like running your modem in Router mode (causes double NATing) or a small home router in front of your UTM. I finally tested the timeout configs and it made no difference. community.sophos.com/.../dhcp-issues-on-external-interface-with-isp
Cancel
Vote Up 0 Vote Down

Cancel
0 Bob Blank over 3 years ago

TEST THIS... it appears that the renewal might bounce the interface... I've seen some weird DNS issues and one of my client devices isn't happy with this setup.
Cancel
Vote Up 0 Vote Down

Cancel