[Users] problem with iptables inside VE

Jean-Marc Pigeon jmp at safe.ca
Tue May 13 15:28:44 PDT 2014


Bonjour Sergey,


HOST: /etc/vz/vz.conf, could be your IPTABLES definition Wrong??

IPTABLES="ipt_state ipt_conntrack ipt_LOG ipt_REJECT ipt_tos ipt_limit  
ipt_multiport iptable_filter iptable_mangle ipt_TCPMSS ipt_tcpmss  
ipt_ttl ipt_length"


Quoting Sergey Ivanov <seriv at cs.umd.edu>:

> Hi,
> I need help with openvz setup.
> Here is the problem. In VE I have:
> ---
> # iptables -S
> -P INPUT ACCEPT
> -P FORWARD ACCEPT
> -P OUTPUT ACCEPT
> -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
> -A INPUT -p icmp -j ACCEPT
> -A INPUT -i lo -j ACCEPT
> -A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
> -A INPUT -j LOG --log-prefix "ipt.input: " --log-level 7
> -A INPUT -j REJECT --reject-with icmp-host-prohibited
> -A FORWARD -j LOG --log-prefix "ipt.forward: " --log-level 7
> -A FORWARD -j REJECT --reject-with icmp-host-prohibited
> ---
> and when I try to ssh to VE, I am failing and in dmesg I see lines about it
> like these (I've modified MAC):
> ---
> [ 9343.653892] ipt.input: IN=eth0 OUT=
> MAC=00:de:ad:be:af:da:de:ad:be:af:de:ad:be:af SRC=10.0.128.117
> DST=10.0.127.53 LEN=60 TOS=0x10 PREC=0x00 TTL=63 ID=1295 DF PROTO=TCP
> SPT=48744 DPT=22 WINDOW=29200 RES=0x00 SYN URGP=0
> ---
> Immediately after "service iptables stop" I have working ssh service and
> can login into VE remotely. I want to do this with iptables.
>
> I use RHEL6 as a HE and tried Fedora-20 downloaded from
> http://download.openvz.org/template/precreated/fedora-20-x86.tar.gz. I use
> VLANs, trunk is going to physical interface em1, HE has ip address on vlan
> 128, there are em1.128 interface for it.
> Virtual environment has netif, created by
> ---
> vzctl set 12753 --save --netiff-add eth0,,veth12753,,br.127
> ---
> I've set up bridge br.127 for this vlan and with automatically added by
> ifcfg scripts em1.127, and
> ---
> EXTERNAL_SCRIPT="/usr/sbin/vznetaddbr"
> ---
> in vznet.conf are adding veth to it. I'm using vzkernel 2.6.32-042stab088.4
>
> --
>   Regards,
>   Sergey Ivanov.

-- 
A bientôt
===========================================================
Jean-Marc Pigeon                        E-Mail: jmp at safe.ca
SAFE Inc.                             Phone: (514) 493-4280
   Clement, 'a kiss solution' to get rid of SPAM (at last)
      Clement' Home base <"http://www.clement.safe.ca">
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