Connection to own Q3 dedicated impossible

I'm trying to run a dedicated Q3 1.32b linux-i386 Nov 14 2002 from a headless Ubuntu 12.04.

Server is not seen in server list. When trying to connect explicitly by address:port from from client machine i get:

Awaiting Connection... 3..5..10... 70...n.

and nothing happens next.

This is how i execute:

quake3@iceberg:~/.q3a/baseq3$ /usr/local/games/quake3/q3ded +set sv_punkbuster 0 +set net_ip 10.0.1.5 +set net_port 27960  +exec ./maprotation.cfg 
Q3 1.32b linux-i386 Nov 14 2002
----- FS_Startup -----
Current search path:
/home/quake3/.q3a/baseq3/pak8.pk3 (9 files)
/home/quake3/.q3a/baseq3/pak7.pk3 (4 files)
/home/quake3/.q3a/baseq3/pak6.pk3 (64 files)
/home/quake3/.q3a/baseq3/pak5.pk3 (7 files)
/home/quake3/.q3a/baseq3/pak4.pk3 (272 files)
/home/quake3/.q3a/baseq3/pak3.pk3 (4 files)
/home/quake3/.q3a/baseq3/pak2.pk3 (148 files)
/home/quake3/.q3a/baseq3/pak1.pk3 (26 files)
/home/quake3/.q3a/baseq3/pak0.pk3 (3539 files)
/home/quake3/.q3a/baseq3
/home/quake3/.q3a/baseq3/baseq3
/usr/local/games/quake3/q3ded/baseq3

----------------------
4073 files in pk3 files
execing default.cfg
execing q3config.cfg
couldn't exec autoexec.cfg
Hunk_Clear: reset the hunk ok
--- Common Initialization Complete ---
Opening IP socket: 10.0.1.5:27960
Hostname: iceberg.gate.kahovka
Alias: iceberg
IP: 127.0.1.1
Started tty console (use +set ttycon 0 to disable)
^3PunkBuster Server: PunkBuster Server (v0.993 | A0 C0.0) **DISABLED**
execing ./maprotation.cfg

You may have noticed that q3ded runs from it's special user. Running from root does not affect the problem. I started suspecting some network issue. So i did a checkup:

entropy@iceberg:~$ sudo netstat -alp --numeric-ports | grep 27960
udp    0     0 10.0.1.5:27960          0.0.0.0:*      9521/q3ded

A check from the client machine:

tim@thinkpad ~$ sudo nmap -sU 10.0.1.5 -p 27960
. . . 
27960/udp open|filtered quake3

I allowed all incoming and outgoing UDP traffic in iptables, but nothing changed.

Here is my main config: pastebin.com/wefnEpR6

My maprotation: pastebin.com/UFj2M0DY

Configured Q3 according to http://it.rcmd.org/networks/q3_install/q3_linux_server_howto.php

What can be the problem with this setup? I'm doomed, any help will be greatly appreciated!