HOWTO fix no route to host in OpenBSD

OpenBSD

I installed OpenBSD 5.1 recently on my new box that’s running Proxmox 2.1. I want OpenBSD to run pf to provide a firewall to protect all the other virtualized hosts on the box. I don’t remember what I put for my default route during the install, and that came back to bite me as I couldn’t get outside of my network. Issuing a ping would resolve a hostname (I run a local DNS server) but then it didn’t have a route to the resolved IP, so it would fail with the error ping: sendto: No route to host

# ping www.google.com
PING www.l.google.com (74.125.225.208): 56 data bytes
ping: sendto: No route to host
ping: wrote www.l.google.com 64 chars, ret=-1
ping: sendto: No route to host
ping: wrote www.l.google.com 64 chars, ret=-1
--- www.l.google.com ping statistics ---
2 packets transmitted, 0 packets received, 100.0% packet loss

It took a bit of digging online, but in the end it was a simple fix; delete the default route and re-add it (I put in my gateway’s IP)

route delete default
route add default 192.168.1.1

Now everything works as it should.

# ping www.google.com 
PING www.l.google.com (74.125.225.209): 56 data bytes
64 bytes from 74.125.225.209: icmp_seq=0 ttl=50 time=40.862 ms
64 bytes from 74.125.225.209: icmp_seq=1 ttl=50 time=38.337 ms
64 bytes from 74.125.225.209: icmp_seq=2 ttl=50 time=38.500 ms
--- www.l.google.com ping statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/std-dev = 38.337/39.233/40.862/1.153 ms

Of course use a different IP if your gateway is different, but after that you’ll be like me; all ready to setup pf on the network!

 
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