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Sophos UTM SG 135 problem with internetconnection / DHCP

Hi there,

I have a strange problem with an internet connection on an SG 135 with the current firmware version.

Two identical cable connections from Vodafone Kabel Deutschland with 1 Gbit each on ETH1 and ETH2 are configured identically on the UTM. Both lines have a static IP that is assigned by the provider via DHCP. Line one has been running smoothly for almost two years. Now a second line has been added, it always runs for about 30 minutes, then it is gone for about 30 minutes. In the log file I see that after the lease has expired, the UTM tries to re-establish the connection. She tries that for about 30 minutes, after which it works again. The uplink balancing is also correctly switched on. Both interfaces are configured as standard gateways.

I have already swapped different Internet interfaces on the UTM, no improvement. In the log file I see the following:

reverseproxy/usr/dehydrated/bin/renew_certificate.pl > /dev/null)

2020:12:22-19:29:09 gw dhclient: DHCPREQUEST for 24.134.237.101 on eth2 to 88.134.230.2 port 67

2020:12:22-19:29:30 gw dhclient: DHCPREQUEST for 24.134.237.101 on eth2 to 88.134.230.2 port 67

2020:12:22-19:29:41 gw dhclient: DHCPREQUEST for 24.134.237.101 on eth2 to 88.134.230.2 port 67

2020:12:22-19:30:00 gw dhclient: DHCPREQUEST for 24.134.237.101 on eth2 to 88.134.230.2 port 67

2020:12:22-19:30:01 gw /usr/sbin/cron[23544]: (dehydrated) CMD (/var/chroot-reverseproxy/usr/dehydrated/bin/renew_certificate.pl > /dev/null)

2020:12:22-19:30:01 gw /usr/sbin/cron[23545]: (root) CMD ( /usr/local/bin/reporter/system-reporter.pl)

2020:12:22-19:30:01 gw /usr/sbin/cron[23546]: (root) CMD (/var/mdw/scripts/pmx-blocklist-update)

2020:12:22-19:30:01 gw /usr/sbin/cron[23547]: (root) CMD ( /usr/local/bin/rpmdb_backup )

2020:12:22-19:30:17 gw dhclient: DHCPREQUEST for 24.134.237.101 on eth2 to 88.134.230.2 port 67

2020:12:22-19:30:30 gw dhclient: DHCPREQUEST for 24.134.237.101 on eth2 to 88.134.230.2 port 67

2020:12:22-19:30:44 gw dhclient: DHCPREQUEST for 24.134.237.101 on eth2 to 88.134.230.2 port 67

2020:12:22-19:31:01 gw /usr/sbin/cron[24101]: (dehydrated) CMD (/var/chroot-reverseproxy/usr/dehydrated/bin/renew_certificate.pl > /dev/null)

2020:12:22-19:31:02 gw dhclient: DHCPREQUEST for 24.134.237.101 on eth2 to 88.134.230.2 port 67

2020:12:22-19:31:19 gw dhclient: DHCPREQUEST for 24.134.237.101 on eth2 to 88.134.230.2 port 67

2020:12:22-19:31:27 gw dhclient: DHCPREQUEST for 24.134.237.101 on eth2 to 88.134.230.2 port 67

2020:12:22-19:31:35 gw dhclient: DHCPREQUEST for 24.134.237.101 on eth2 to 88.134.230.2 port 67

2020:12:22-19:31:47 gw dhclient: DHCPREQUEST for 24.134.237.101 on eth2 to 88.134.230.2 port 67

2020:12:22-19:32:01 gw /usr/sbin/cron[24563]: (root) CMD ( nice -n19 /usr/local/bin/gen_inline_reporting_data.plx)

2020:12:22-19:32:01 gw /usr/sbin/cron[24564]: (dehydrated) CMD (/var/chroot-reverseproxy/usr/dehydrated/bin/renew_certificate.pl > /dev/null)

2020:12:22-19:32:06 gw dhclient: DHCPREQUEST for 24.134.237.101 on eth2 to 88.134.230.2 port 67

2020:12:22-19:32:14 gw dhclient: DHCPREQUEST for 24.134.237.101 on eth2 to 88.134.230.2 port 67

2020:12:22-19:32:34 gw dhclient: DHCPREQUEST for 24.134.237.101 on eth2 to 88.134.230.2 port 67

2020:12:22-19:32:43 gw dhclient: DHCPREQUEST for 24.134.95.205 on eth1 to 88.134.230.2 port 67

2020:12:22-19:32:43 gw dhclient: DHCPACK of 24.134.95.205 from 88.134.230.2

2020:12:22-19:32:43 gw dhclient: bound to 24.134.95.205 -- renewal in 1228 seconds.

2020:12:22-19:32:48 gw dhclient: DHCPREQUEST for 24.134.237.101 on eth2 to 88.134.230.2 port 67

2020:12:22-19:33:01 gw /usr/sbin/cron[25076]: (dehydrated) CMD (/var/chroot-reverseproxy/usr/dehydrated/bin/renew_certificate.pl > /dev/null)

2020:12:22-19:33:08 gw dhclient: DHCPREQUEST for 24.134.237.101 on eth2 to 255.255.255.255 port 67

2020:12:22-19:33:17 gw dhclient: DHCPREQUEST for 24.134.237.101 on eth2 to 255.255.255.255 port 67

2020:12:22-19:33:26 gw dhclient: DHCPREQUEST for 24.134.237.101 on eth2 to 255.255.255.255 port 67

2020:12:22-19:33:26 gw dhclient: DHCPACK of 24.134.237.101 from 88.134.230.2

2020:12:22-19:33:26 gw dhclient: bound to 24.134.237.101 -- renewal in 1554 seconds.

Then after a while this comes up:

19:32:06 gw dhclient: DHCPREQUEST for 24.134.237.101 on eth2 to 88.134.230.2 port 67

2020:12:22-19:32:14 gw dhclient: DHCPREQUEST for 24.134.237.101 on eth2 to 88.134.230.2 port 67

2020:12:22-19:32:34 gw dhclient: DHCPREQUEST for 24.134.237.101 on eth2 to 88.134.230.2 port 67

2020:12:22-19:32:43 gw dhclient: DHCPREQUEST for 24.134.95.205 on eth1 to 88.134.230.2 port 67

2020:12:22-19:32:43 gw dhclient: DHCPACK of 24.134.95.205 from 88.134.230.2

2020:12:22-19:32:43 gw dhclient: bound to 24.134.95.205 -- renewal in 1228 seconds.

2020:12:22-19:32:48 gw dhclient: DHCPREQUEST for 24.134.237.101 on eth2 to 88.134.230.2 port 67

2020:12:22-19:33:01 gw /usr/sbin/cron[25076]: (dehydrated) CMD (/var/chroot-reverseproxy/usr/dehydrated/bin/renew_certificate.pl > /dev/null)

2020:12:22-19:33:08 gw dhclient: DHCPREQUEST for 24.134.237.101 on eth2 to 255.255.255.255 port 67

2020:12:22-19:33:17 gw dhclient: DHCPREQUEST for 24.134.237.101 on eth2 to 255.255.255.255 port 67

2020:12:22-19:33:26 gw dhclient: DHCPREQUEST for 24.134.237.101 on eth2 to 255.255.255.255 port 67

2020:12:22-19:33:26 gw dhclient: DHCPACK of 24.134.237.101 from 88.134.230.2

2020:12:22-19:33:26 gw dhclient: bound to 24.134.237.101 -- renewal in 1554 seconds.

2020:12:22-19:34:01 gw /usr/sbin/cron[25630]: (dehydrated) CMD (/var/chroot-reverseproxy/usr/dehydrated/bin/renew_certificate.pl > /dev/n


I have no idea what else to try.

Any help is very welcome.

Cheers,

Horst



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