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4

I'll answer #2: No. When getting an IP address the dhcp daemon creates a raw socket to the network interface and handles the UDP protocol itself. Thus the UDP packets never go through iptables. The reason the dhcp daemon has to implement UDP is that the kernel can only handle UDP (in fact all of the TCP/IP suite) when the interface has an IP address. ...


4

You wouldn't ordinarily have 2 DHCP servers on the same subnet. That's asking for big problems. You would have one DHCP server that handles both tasks.


2

You don't mention the OS in question, what problem you're seeing, whether you're the DHCP / PXE server or client (or both), and what "usual techniques" you've tried so far. Any or all of those details would be helpful. Having said that, I'd look to whatever sniffer software your OS has available as the first stop along the way. Presumably one or more of ...


2

Adding $IPT -I INPUT -i $INTIF -p udp --dport 67:68 --sport 67:68 -j ACCEPT shall make DHCPD update faster :) It shall works both side INPUT and OUTPUT. You can DROP dhcpd with ebtables, not with iptables. DHCPD listening at 0.0.0.0, not within IP


1

Do you have routes from the DNS and WINS servers to the non-working VLAN (VLAN2)? Do you have your DNS server listed as authoritative for VLAN2 IP network? I.e. is the IP range for VLAN2 listed in your Reverse Lookup Zones? What are you using to pass the DHCP broadcasts from VLAN to the other? Do you have a router between networks that could be ...


1

The device may be "rejected" in WDS. Try clearing your rejected devices list by running wdsutil /Delete-AutoAddDevices /DeviceType:RejectedDevices


1

Okay, solution found. I googled 'PLCache_read' (the last function listed in /Library/Logs/DiagnosticReports/bootpd_2010-08-12-165459_localhost.crash as having been run by bootpd before the buffer overflow) and the second hit was in Apple's source for bootpd (bsdpd.c, specificall). BSDP_CLIENTS_FILE() is passed the BSDP_CLIENTS_FILE constant, which, looking ...


1

I've never done it, but you can have two DHCP servers that both make offers to a client. It is up to the client to pick one of the offers I think the trick is that you need to add the "authoritative" command to the top of the DHCP configuration on the Clonezilla machine but not on the PFSense box. That way if Clonezilla offers the client a DHCP address ...


1

This is kind of an old post, but it still comes up in search results, so I'm going to add to it. First: having two DHCP servers in a subnet is not going to cause problems no matter what, that's a very misleading statement. What will cause issues is two DHCP servers which are offering the same pool of addresses. You can have two servers offering different ...


1

If you are using PXELINUX server it is recommended to use "filename" option even if it is default boot file. Without specifying it some of the clients might not boot. This is a good reference for implementing PXE Boot. PXELINUX



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