gem install slanger
Building native extensions.  This could take a while...
ERROR:  Error installing slanger:
    ERROR: Failed to build gem native extension.

        /usr/bin/ruby1.9.1 extconf.rb
checking for rb_trap_immediate in ruby.h,rubysig.h... no
checking for rb_thread_blocking_region()... yes
checking for inotify_init() in sys/inotify.h... yes
checking for writev() in sys/uio.h... yes
checking for rb_thread_check_ints()... yes
checking for rb_time_new()... yes
checking for sys/event.h... no
checking for epoll_create() in sys/epoll.h... yes
checking for main() in -lcrypto... yes
checking for main() in -lssl... yes
checking for main() in -lcrypto... yes
checking for openssl/ssl.h... yes
checking for openssl/err.h... yes
creating Makefile

make
compiling rubymain.cpp
rubymain.cpp: In function ‘VALUE t_connect_server(VALUE, VALUE, VALUE)’:
rubymain.cpp:468:42: error: format not a string literal and no format arguments [-Werror=format-security]
rubymain.cpp: In function ‘VALUE t_bind_connect_server(VALUE, VALUE, VALUE, VALUE, VALUE)’:
rubymain.cpp:488:42: error: format not a string literal and no format arguments [-Werror=format-security]
cc1plus: some warnings being treated as errors
make: *** [rubymain.o] Ошибка 1


Gem files will remain installed in /var/lib/gems/1.9.1/gems/eventmachine-0.12.10 for inspection.
Results logged to /var/lib/gems/1.9.1/gems/eventmachine-0.12.10/ext/gem_make.out

09:42:16.976198 a1:b2:c3:d4:e5:f6 > aa:bb:cc:dd:ee:ff, ethertype IPv4 
(0x0800), length 60: 10.0.0.7.2312 > 192.198.93.78.80: Flags [F.], seq 
3579355710, ack 2348566885, win 65101, length 0
09:42:17.076330 a1:b2:c3:d4:e5:f6 > aa:bb:cc:dd:ee:ff, ethertype IPv4 
(0x0800), length 60: 10.0.0.7.2271 > 65.75.156.119.80: Flags [F.], seq 
3329167346, ack 2138564996, win 65408, length 0
09:42:17.177311 a1:b2:c3:d4:e5:f6 > aa:bb:cc:dd:ee:ff, ethertype IPv4 
(0x0800), length 60: 10.0.0.7.2096 > 149.47.143.131.80: Flags [F.], seq 
833600034, ack 1463451994, win 65205, length 0
09:42:17.378092 a1:b2:c3:d4:e5:f6 > aa:bb:cc:dd:ee:ff, ethertype IPv4 
(0x0800), length 60: 10.0.0.7.2160 > 193.234.222.240.80: Flags [F.], seq 
380954537, ack 1918089133, win 65530, length 0
09:42:17.478724 a1:b2:c3:d4:e5:f6 > aa:bb:cc:dd:ee:ff, ethertype IPv4 
(0x0800), length 60: 10.0.0.7.2522 > 199.231.188.243.80: Flags [F.], seq 
2524482819, ack 2992113059, win 64726, length 0
09:42:17.482664 a1:b2:c3:d4:e5:f6 > aa:bb:cc:dd:ee:ff, ethertype IPv4 
(0x0800), length 60: 10.0.0.7.2376 > 118.139.177.199.80: Flags [F.], seq 
3912490494, ack 3173571000, win 65464, length 0
09:42:17.512824 a1:b2:c3:d4:e5:f6 > aa:bb:cc:dd:ee:ff, ethertype IPv4 
(0x0800), length 60: 10.0.0.7.3493 > 192.126.137.25.8800: Flags [R], seq 
714854646, win 0, length 0
09:42:17.512847 a1:b2:c3:d4:e5:f6 > aa:bb:cc:dd:ee:ff, ethertype IPv4 
(0x0800), length 60: 10.0.0.7.3493 > 192.126.137.25.8800: Flags [R], seq 
714854646, win 0, length 0

net.ipv4.ip_forward=1

# Loopback device:
auto lo
iface lo inet loopback


# device: eth0
auto  eth0
iface eth0 inet static
  address   xx.xx.xx.42
  broadcast xx.xx.xx.63
  netmask   255.255.255.224
  gateway   xx.xx.xx.33
  # default route to access subnet
  up route add -net xx.xx.xx.32 netmask 255.255.255.224 gw xx.xx.xx.33 eth0


auto vmbr0
iface vmbr0 inet static
    address  10.0.0.254
    netmask  255.255.255.0
    bridge_ports none
    bridge_stp off
    bridge_fd 0

iptables -t nat -A POSTROUTING -s '10.0.0.0/24' -j SNAT --to-source xx.xx.xx.42

cat /etc/debian_version
7.2

uname -a
Linux 1.server.com 2.6.32-25-pve #1 SMP Tue Oct 1 09:17:16 CEST 2013 x86_64 GNU/Linux

pveversion -v
proxmox-ve-2.6.32: 3.1-113 (running kernel: 2.6.32-25-pve)
pve-manager: 3.1-17 (running version: 3.1-17/eb90521d)
pve-kernel-2.6.32-25-pve: 2.6.32-113
lvm2: 2.02.98-pve4
clvm: 2.02.98-pve4
corosync-pve: 1.4.5-1
openais-pve: 1.1.4-3
libqb0: 0.11.1-2
redhat-cluster-pve: 3.2.0-2
resource-agents-pve: 3.9.2-4
fence-agents-pve: 4.0.0-2
pve-cluster: 3.0-7
qemu-server: 3.1-5
pve-firmware: 1.0-23
libpve-common-perl: 3.0-6
libpve-access-control: 3.0-6
libpve-storage-perl: 3.0-13
pve-libspice-server1: 0.12.4-2
vncterm: 1.1-4
vzctl: 4.0-1pve3
vzprocps: 2.0.11-2
vzquota: 3.1-2
pve-qemu-kvm: 1.4-17
ksm-control-daemon: 1.1-1
glusterfs-client: 3.4.0-2