Heh, just after I decided to package ss-20121226, HAProxy 1.5-dev17 got released. Oh well, I just had to upgrade so I packaged it for my own usage ;-). I also updated the dependencies a bit because I am compiling with SSL and Compression enabled. Just get it at http://www.roedie.nl/downloads/haproxy/haproxy-1.5-dev17/.
After I forgot to post about HAProxy 1.5-dev9, I can now post that I’ve also packaged HAProxy 1.5-dev10. You can get it at http://www.roedie.nl/downloads/haproxy/haproxy-1.5-dev10/.
If anyone is interested in getting these updates through apt-get, then drop me a line, I might set up an apt repository for easy updates.
While implementing IPv6 in my company network I also started looking for a replacement for fail2ban. Fail2ban is a tool which monitors log files looking for anomalies. When someone tries to brute force your sshd, fail2ban will notice and block the offender using iptables or whatever firewall you use.
Fail2ban has served me well the last couple of years, but it doesn’t support IPv6 and the last release was on 7-9-2009 which is almost 2 years ago. This didn’t give me the idea the IPv6 support would ever be implemented. But then again, I can be wrong…
I gave a stab at writing my own implementation which would support IPv6 and started looking on freshmeat looking for similar scripts to see how they worked. Then I found a small Perl script called autofwd written by Arthur Corliss. I downloaded it to see how if there was any usable code in there but quickly found out that it actually was the tool I was looking for. It’s portable, so you can use any kind of firewall with it. I myself use shorewall and it took me only a couple of minutes to plug that in.
If you’re looking for a flexible/portable fail2ban replacement I certainly recommend looking at autofwd. It doesn’t have a homepage but you can get it here. I’ve created a Debian package which is available here.
I already knew that .local is not a correct tld, but since it was recomended by Microsoft to use this when installing Active Directory we used it. I never had any problems with it because most of the time I just use ip addresses when I need to access a server.
Now I installed a proxy server and a new mail relay server so I started using them as proxy.mycompany.local and relay.mycompany.local. The I found out that none of my Debian or Ubuntu workstations would resolve those addresses. At first I blamed the Microsoft DNS server for this. That’s the easiest and most logical thing to do ;-). But Windows XP/Vista clients did resolve those addresses. Strange huh?
This quickly gave me the conclusion that it was something avahi related because this does all the zeroconf stuff with Debian/Ubuntu. Avahi seems to be configured to pick up any request ending in .local and make MDNS requests for it. This must be a problem for more people because there must be loads of Microsoft networks out there ending in .local. I won’t say this is a fault from the avahi guys because it’s also completely wrong to use .local as tld.
My current solution is to just simply disable Avahi on my workstations. On Ubuntu I just do ‘System -> Administration -> Services’ and disable ‘Multicast DNS Service Discovery’ there. With Debian I just disable the startup of Avahi in /etc/default/avahi-daemon by settting ‘AVAHI_DAEMON_START=0’.
There’s another way to create vlan interfaces with Debian/Ubuntu. It’s even shorter than the previous example. Just add the following to /etc/network/interfaces:
auto eth0.10 iface eth0.10 inet static addres 10.0.0.2 netmask 255.255.255.0 gateway 10.0.0.1
Just make sure you dit ‘apt-get install vlan’ or something like that.
It’s just that I can’t remember how to make vlan’s witch Debian. I always have to re-invent the wheel or look at old configs which are never where I think they are… So… Here it is so I don’t have to remember it and maybe some other people will find it useful.
In /etc/network/interfaces you add the following:
# Vlan 10 iface vlan10 inet static adress 10.0.0.2 netmask 255.255.255.0 gateway 10.0.0.1 vlan_raw_device eth0
This will add vlan10 to interface eth0. It’s so easy but I just cannot remember it when I need it.
I’m thinking about packaging feedbackd and use it together with keepalived to adjust the weight of realservers during runtime. I’m not sure if it’s feasible, else I will write my own poor mans implementation.
Because the release of Nagios 3.0 is comming closer, I wanted to have a look at it. I’ve found some nice packages on the blog of Sven Velt. Those packages are for i386 only and I needed amd64 packages. I just took the sources and recompiled them for the amd64 architecture. You can get them here. I take no credit for the packages because I merely compiled it.
Nagios 3 looks good. It has some nice new features like the multi line output for plugins. This wil likely make it possible to run more checks with less stress on the Nagios server. I’ll post more when I find more nice features :-)