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My laptop running as a server was running just fine till yesterday. Then I run upgrade and for some reason I get private and public IP address for my one wired NIC. Before the upgrade there was only public IP address that was acquired from ISP DHCP through my ADSL modem. Here is the pacman.log.
[2014-10-14 13:04] [PACMAN] starting full system upgrade
[2014-10-14 13:10] [PACMAN] upgraded bash (4.3.027-1 -> 4.3.030-1)
[2014-10-14 13:10] [PACMAN] upgraded boost-libs (1.56.0-1 -> 1.56.0-2)
[2014-10-14 13:10] [PACMAN] upgraded dhcpcd (6.4.3-1 -> 6.5.0-1)
[2014-10-14 13:10] [PACMAN] upgraded gnutls (3.3.8-2 -> 3.3.9-1)
[2014-10-14 13:10] [PACMAN] upgraded ffmpeg (1:2.4.1-1 -> 1:2.4.2-1)
[2014-10-14 13:10] [PACMAN] upgraded inetutils (1.9.2-1 -> 1.9.2-2)
[2014-10-14 13:10] [PACMAN] upgraded irssi (0.8.16-1 -> 0.8.17-1)
[2014-10-14 13:10] [PACMAN] upgraded libdrm (2.4.56-1 -> 2.4.58-1)
[2014-10-14 13:10] [PACMAN] upgraded libdvdnav (5.0.0-1 -> 5.0.1-1)
[2014-10-14 13:10] [PACMAN] upgraded libldap (2.4.39-1 -> 2.4.40-1)
[2014-10-14 13:10] [PACMAN] upgraded pcre (8.35-1 -> 8.36-1)
[2014-10-14 13:10] [PACMAN] upgraded libmariadbclient (10.0.14-1 -> 10.0.14-2)
[2014-10-14 13:10] [PACMAN] upgraded libogg (1.3.1-2 -> 1.3.2-1)
[2014-10-14 13:10] [PACMAN] upgraded libtiff (4.0.3-4 -> 4.0.3-5)
[2014-10-14 13:10] [ALPM-SCRIPTLET] >>> Updating module dependencies. Please wait ...
[2014-10-14 13:10] [ALPM-SCRIPTLET] >>> Generating initial ramdisk, using mkinitcpio. Please wait...
[2014-10-14 13:10] [ALPM-SCRIPTLET] ==> Building image from preset: /etc/mkinitcpio.d/linux.preset: 'default'
[2014-10-14 13:10] [ALPM-SCRIPTLET] -> -k /boot/vmlinuz-linux -c /etc/mkinitcpio.conf -g /boot/initramfs-linux.img
[2014-10-14 13:10] [ALPM-SCRIPTLET] ==> Starting build: 3.16.4-1-ARCH
[2014-10-14 13:10] [ALPM-SCRIPTLET] -> Running build hook: [base]
[2014-10-14 13:10] [ALPM-SCRIPTLET] -> Running build hook: [udev]
[2014-10-14 13:10] [ALPM-SCRIPTLET] -> Running build hook: [autodetect]
[2014-10-14 13:10] [ALPM-SCRIPTLET] -> Running build hook: [modconf]
[2014-10-14 13:10] [ALPM-SCRIPTLET] -> Running build hook: [block]
[2014-10-14 13:10] [ALPM-SCRIPTLET] -> Running build hook: [filesystems]
[2014-10-14 13:10] [ALPM-SCRIPTLET] -> Running build hook: [keyboard]
[2014-10-14 13:10] [ALPM-SCRIPTLET] -> Running build hook: [fsck]
[2014-10-14 13:10] [ALPM-SCRIPTLET] ==> Generating module dependencies
[2014-10-14 13:10] [ALPM-SCRIPTLET] ==> Creating gzip-compressed initcpio image: /boot/initramfs-linux.img
[2014-10-14 13:10] [ALPM-SCRIPTLET] ==> Image generation successful
[2014-10-14 13:10] [ALPM-SCRIPTLET] ==> Building image from preset: /etc/mkinitcpio.d/linux.preset: 'fallback'
[2014-10-14 13:10] [ALPM-SCRIPTLET] -> -k /boot/vmlinuz-linux -c /etc/mkinitcpio.conf -g /boot/initramfs-linux-fallback.img -S autodetect
[2014-10-14 13:10] [ALPM-SCRIPTLET] ==> Starting build: 3.16.4-1-ARCH
[2014-10-14 13:10] [ALPM-SCRIPTLET] -> Running build hook: [base]
[2014-10-14 13:10] [ALPM-SCRIPTLET] -> Running build hook: [udev]
[2014-10-14 13:10] [ALPM-SCRIPTLET] -> Running build hook: [modconf]
[2014-10-14 13:10] [ALPM-SCRIPTLET] -> Running build hook: [block]
[2014-10-14 13:10] [ALPM-SCRIPTLET] ==> WARNING: Possibly missing firmware for module: aic94xx
[2014-10-14 13:10] [ALPM-SCRIPTLET] ==> WARNING: Possibly missing firmware for module: smsmdtv
[2014-10-14 13:10] [ALPM-SCRIPTLET] -> Running build hook: [filesystems]
[2014-10-14 13:10] [ALPM-SCRIPTLET] -> Running build hook: [keyboard]
[2014-10-14 13:10] [ALPM-SCRIPTLET] -> Running build hook: [fsck]
[2014-10-14 13:10] [ALPM-SCRIPTLET] ==> Generating module dependencies
[2014-10-14 13:10] [ALPM-SCRIPTLET] ==> Creating gzip-compressed initcpio image: /boot/initramfs-linux-fallback.img
[2014-10-14 13:10] [ALPM-SCRIPTLET] ==> Image generation successful
[2014-10-14 13:10] [PACMAN] upgraded linux (3.16.3-1 -> 3.16.4-1)
[2014-10-14 13:10] [PACMAN] upgraded lirc-utils (1:0.9.1.a-4 -> 1:0.9.1.a-5)
[2014-10-14 13:10] [ALPM-SCRIPTLET] (re)building database...
[2014-10-14 13:11] [PACMAN] upgraded man-db (2.6.7.1-1 -> 2.7.0.2-2)
[2014-10-14 13:11] [PACMAN] upgraded man-pages (3.73-1 -> 3.74-1)
[2014-10-14 13:11] [PACMAN] installed jemalloc (3.6.0-1)
[2014-10-14 13:11] [PACMAN] upgraded mariadb-clients (10.0.14-1 -> 10.0.14-2)
[2014-10-14 13:11] [PACMAN] upgraded mariadb (10.0.14-1 -> 10.0.14-2)
[2014-10-14 13:11] [PACMAN] installed libomxil-bellagio (0.9.3-1)
[2014-10-14 13:11] [PACMAN] installed libtxc_dxtn (1.0.1-5)
[2014-10-14 13:11] [PACMAN] installed mesa-dri (10.3.1-1)
[2014-10-14 13:11] [PACMAN] upgraded mesa (10.2.8-1 -> 10.3.1-1)
[2014-10-14 13:11] [PACMAN] upgraded mpg123 (1.20.1-1 -> 1.21.0-1)
[2014-10-14 13:11] [PACMAN] upgraded nginx (1.6.2-1 -> 1.6.2-2)
[2014-10-14 13:11] [PACMAN] upgraded nvidia-utils (340.32-1 -> 343.22-1)
[2014-10-14 13:11] [PACMAN] upgraded nvidia-libgl (340.32-1 -> 343.22-1)
[2014-10-14 13:11] [ALPM] warning: /etc/php/php.ini installed as /etc/php/php.ini.pacnew
[2014-10-14 13:11] [PACMAN] upgraded php (5.6.0-6 -> 5.6.1-1)
[2014-10-14 13:11] [PACMAN] upgraded php-fpm (5.6.0-6 -> 5.6.1-1)
[2014-10-14 13:11] [PACMAN] upgraded php-gd (5.6.0-6 -> 5.6.1-1)
[2014-10-14 13:11] [PACMAN] upgraded php-intl (5.6.0-6 -> 5.6.1-1)
[2014-10-14 13:11] [PACMAN] upgraded php-ldap (5.6.0-6 -> 5.6.1-1)
[2014-10-14 13:11] [PACMAN] upgraded php-mcrypt (5.6.0-6 -> 5.6.1-1)
[2014-10-14 13:11] [PACMAN] upgraded php-pear (5.6.0-6 -> 5.6.1-1)
[2014-10-14 13:11] [PACMAN] upgraded php-snmp (5.6.0-6 -> 5.6.1-1)
[2014-10-14 13:11] [PACMAN] upgraded php-tidy (5.6.0-6 -> 5.6.1-1)
[2014-10-14 13:11] [PACMAN] upgraded python (3.4.1-1 -> 3.4.2-1)
[2014-10-14 13:11] [PACMAN] upgraded s-nail (14.7.6-1 -> 14.7.8-1)
[2014-10-14 13:11] [PACMAN] upgraded vim-runtime (7.4.459-1 -> 7.4.473-1)
[2014-10-14 13:11] [PACMAN] upgraded vim (7.4.459-1 -> 7.4.473-1)
[2014-10-14 13:11] [PACMAN] upgraded xcb-util-keysyms (0.3.9-2 -> 0.4.0-1)
[2014-10-14 13:11] [PACMAN] upgraded xkeyboard-config (2.12-1 -> 2.13-1)
After the upgrade I rebooted the laptop. I couldn't ssh to it so today I got onsite and took a look at it. I saw two IP addresses, 192.168.x.x and 46.163.x.x. There were also two routes, default was via 192.168.0.1 and another was 46.163.x.x. I couldn't ping even my own gateway (192.168.0.1 or 46.163.x.x) so I removed the 192.168.x.x IP address and 192.168.x.x route and things went back to normal.
Has anyone any hint where that private address might be coming from? I checked that there is no configurations under /etc/netctl or /etc/systemd/network. I have only enabled service dhcpcd@eth0.service and it seems to be functioning as usual. I have also checked my ADSL modem so that there is no NAT or DHCP configured.
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