Back in February, ocicat recommended FAQ 6:
http://www.daemonforums.org/showthre...2878#post21488
http://www.daemonforums.org/showthre...2878#post21492
In that thread where FAQ 6 was discussed, you wrote you had an /etc/hostname.rl0 file. Since you no longer have it ...
something has changed since the last time you mentioned your network configuration, back in February.
I'll ask again:
did IRC ever work for you in the past? You asked about IRC script files in March.
Apparently, you are no longer using a static IP address, and it looks to me like you are using DHCP, and are manually using dhclient(8) once again, rather than a hostname file. A re-reading of FAQ 6 is recommended, since you are not automating your network configuration.
As currently configured, your network appears as follows:
IP Address: 172.17.4.72
Subnet mask: 255.255.255.0
CIDR description: 172.17.4.72/24
Default route: 172.17.4.1
I see nothing unusual in your configuration, other than a lack of correct configuration files. Your default route (network gateway) appears to be routing properly, according to your routing table.
This give me the opportunity to ask you a second time: when you boot another OS on the same computer,
can you please confirm the other OSes use the same IP address of 172.17.4.72?
I'm asking this (again), because the problem, as I understand it, is that IRC is the
only network application you have tried that is not working.
Is that assumption correct? If so, then the most likely reason is a firewall setting. Your firewall is external to OpenBSD, and resides in your gateway router at 172.17.4.1. If your Linux and Windows systems use a different IP address, than that would explain why they work and this OS does not.