linux firewall + load balance ISP connectionsview story

http://serverfault.com – I'm trying to get a linux Mint computer with 4 NIC's to act as a load balance server. (HowTos)

IPTables Proxy NATview story

http://serverfault.com – I am trying to create a proxy NAT that will forward a port to a remote host. I have two interfaces: venet0:0 and venet0:18. I want to be able to forward connections from venet0:18 to venet0:0 and then out to a remote host. I have tried this: http://www.debian-administration.org/articles/595 and it does work but I cannot get it to forward the packets through my other interface (venet0:0). (HowTos)

Deciphering IPSEC errorsview story

http://serverfault.com – I have a host I am trying to setup for ipsec. But I am finding some errors in the log that don't make much sense to me. The system are Rhel 5.5 boxes. I followed RHEL's IPSec deployment directions to setup a host to host IPSec connection between hosts on two different LAN's. One host has a bonded interface. After running tcpdump I don't see any traffic going to the second host. (HowTos)

Iptables: how to redirect port 80 only for a specific domainview story

http://serverfault.com – sorry for the title, but im such a newbie in server configurations. (HowTos)

Is it safe to use /bin/cat as shell for restrited user?view story

http://unix.stackexchange.com – I need to remontely log on to few peoples machines to do maintanance tasks, but sometimes the machines can be behind firewalls or NAT's. The way I have been doing it is to give the user advice on how to log in to my system with SSH so that reverse tunneling is enabled, like "use command 'ssh -R 12345:localhost:22 [email protected]' and login with password xyzzy" Now, this works fine, but (HowTos)

Unusual state of internet connection on Ubuntu 11.10view story

http://askubuntu.com – I am currently working on ubuntu 11.10. I tried to upgrade it to 12.04 using the update manager. I am using a wifi connection. I get pretty good downloading and browsing speeds on my host machine which is a windows 7. However, i am not able to upgrade my version of ubuntu as i am getting only around 1 KBps speed on my VM while its more than 1 MBps on my host. Could there be something wrong.? (HowTos)

IP Tables Issue on VPSview story

http://serverfault.com – Running a VPS with Centos 6. If I run ifconfig, the adapter with net is named venet0:0-00 venet0:0-00 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 inet addr:hidden P-t-P:hidden Bcast:hidden Mask: So I run this: iptables -t nat -A POSTROUTING -s -o venet0 -j MASQUERADE But it tells me, iptables: No chain/target/match by tha (HowTos)

CentOS 6.3, dual NICs, can't SSH or Webmin (NAT fail?)view story

https://www.centos.org – Quote:vonskippy wrote:You've added a whole lot of networking complexity while adding basically zero additional security....If ... [by alexm] (Distributions)

PIX Firewall Causing Packet Lossview story

http://serverfault.com – I am currently in the process of modifying how internet reaches my front end servers and I am having a strange issue with one of the existing stacks. There is one physical firewall which is above the server, if I use this, I start recieving packet loss across the entire subnet, if I use wireshark I can see arp requests but I still get packet loss. (HowTos)

Multiple DNS names and IP address to make load balancing more efficient in an Exchange CAS Arrayview story

http://serverfault.com – The tl;dr problem The CAS server occasionally gets one or two NAT'ed IP addresses that have several hundred users behind it. That is bad for scalability. The tl;dr solution Have the NAT'ed outlook clients connect to more than one DNS name/IP destination. (HowTos)