Re: SMTP Load Balancing - Barracuda
Thanks Jim, I guess I'll give them a call. - Sean On Thu, Jan 20, 2011 at 11:32 AM, Kennedy, Jim kennedy...@elyriaschools.org wrote: You will need contact their support on that. They will tunnel in and adjust it for you. However ask them if this will reset each time you update the firmware, I suspect it will that is how any special settings I have had them make behave. There is a downside to what you are doing…..turning down the dns cache will probably turn down all the dns cache’s….so you will be doing far more lookups with it. JK That sounds likely, I just don't see anywhere within the GUI to control that behaivor. - Sean On Thu, Jan 20, 2011 at 8:55 AM, Kennedy, Jim kennedy...@elyriaschools.org wrote: Cuda’s caching the dns lookup? *From:* Sean Martin [mailto:seanmarti...@gmail.com] *Sent:* Thursday, January 20, 2011 12:43 PM *To:* MS-Exchange Admin Issues *Subject:* SMTP Load Balancing - Barracuda Good morning all, I've got two Barracuda SPAM/Virus Firewalls that I'm trying to setup for load balancing outgoing mail. The Barracuda's forward mail to a smarthost, and since they're clustered, I can't specify separate smart hosts per device. Barracuda documentation indicates this is accomplished using MX records. I created an MX record named testmx.domain.com and two A records both named test.domain.com, one for each of the downstream smart hosts. However, both of the barracuda's appear to favor only one of the smart hosts when delivering outgoing mail. Repeated NSLookups against the MX record seem to alternate between the A records as expected. Any ideas on why this wouldn't work? - Sean --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist
Re: SMTP Load Balancing - Barracuda
The A records are named the same because I'm only referencing a single MX record. I'm using the second method described in this document: http://www.barracudanetworks.com/ns/downloads/White_Papers/BarracudaNetworks_WP_Load_Balancing_Email_Using_DNS_MX_Records.pdf - Sean On Thu, Jan 20, 2011 at 11:39 AM, Don Andrews don.andr...@safeway.comwrote: I don’t think you should have to (or want to) name the A records the same – that’s what the equally weighted MX is for – but I also don’t think that is necessarily your problem if you are getting the expected results when running nslookup from the Barracuda. -- *From:* Sean Martin [mailto:seanmarti...@gmail.com] *Sent:* Thursday, January 20, 2011 9:43 AM *To:* MS-Exchange Admin Issues *Subject:* SMTP Load Balancing - Barracuda Good morning all, I've got two Barracuda SPAM/Virus Firewalls that I'm trying to setup for load balancing outgoing mail. The Barracuda's forward mail to a smarthost, and since they're clustered, I can't specify separate smart hosts per device. Barracuda documentation indicates this is accomplished using MX records. I created an MX record named testmx.domain.com and two A records both named test.domain.com, one for each of the downstream smart hosts. However, both of the barracuda's appear to favor only one of the smart hosts when delivering outgoing mail. Repeated NSLookups against the MX record seem to alternate between the A records as expected. Any ideas on why this wouldn't work? - Sean --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist
Re: SMTP Load Balancing - Barracuda
I don't think that's true Bill. I think you simply leave the smarthost field blank. - Sean On Thu, Jan 20, 2011 at 1:05 PM, Bill Humphries nt...@hedgedigger.comwrote: So, I don't even think it is possible to have the barracuda send mail directly and not use a smart host. That annoyed me. Bill Sean Martin wrote: Good morning all, I've got two Barracuda SPAM/Virus Firewalls that I'm trying to setup for load balancing outgoing mail. The Barracuda's forward mail to a smarthost, and since they're clustered, I can't specify separate smart hosts per device. Barracuda documentation indicates this is accomplished using MX records. I created an MX record named testmx.domain.com http://testmx.domain.com and two A records both named test.domain.com http://test.domain.com, one for each of the downstream smart hosts. However, both of the barracuda's appear to favor only one of the smart hosts when delivering outgoing mail. Repeated NSLookups against the MX record seem to alternate between the A records as expected. Any ideas on why this wouldn't work? - Sean --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com mailto: listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist
RE: SMTP Load Balancing - Barracuda
Cuda's caching the dns lookup? From: Sean Martin [mailto:seanmarti...@gmail.com] Sent: Thursday, January 20, 2011 12:43 PM To: MS-Exchange Admin Issues Subject: SMTP Load Balancing - Barracuda Good morning all, I've got two Barracuda SPAM/Virus Firewalls that I'm trying to setup for load balancing outgoing mail. The Barracuda's forward mail to a smarthost, and since they're clustered, I can't specify separate smart hosts per device. Barracuda documentation indicates this is accomplished using MX records. I created an MX record named testmx.domain.comhttp://testmx.domain.com and two A records both named test.domain.comhttp://test.domain.com, one for each of the downstream smart hosts. However, both of the barracuda's appear to favor only one of the smart hosts when delivering outgoing mail. Repeated NSLookups against the MX record seem to alternate between the A records as expected. Any ideas on why this wouldn't work? - Sean --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.commailto:listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist
Re: SMTP Load Balancing - Barracuda
That sounds likely, I just don't see anywhere within the GUI to control that behaivor. - Sean On Thu, Jan 20, 2011 at 8:55 AM, Kennedy, Jim kennedy...@elyriaschools.orgwrote: Cuda’s caching the dns lookup? *From:* Sean Martin [mailto:seanmarti...@gmail.com] *Sent:* Thursday, January 20, 2011 12:43 PM *To:* MS-Exchange Admin Issues *Subject:* SMTP Load Balancing - Barracuda Good morning all, I've got two Barracuda SPAM/Virus Firewalls that I'm trying to setup for load balancing outgoing mail. The Barracuda's forward mail to a smarthost, and since they're clustered, I can't specify separate smart hosts per device. Barracuda documentation indicates this is accomplished using MX records. I created an MX record named testmx.domain.com and two A records both named test.domain.com, one for each of the downstream smart hosts. However, both of the barracuda's appear to favor only one of the smart hosts when delivering outgoing mail. Repeated NSLookups against the MX record seem to alternate between the A records as expected. Any ideas on why this wouldn't work? - Sean --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist
RE: SMTP Load Balancing - Barracuda
Are the devices overworked with outgoing email? If not, I would not worry about that. From: Sean Martin [mailto:seanmarti...@gmail.com] Sent: Thursday, January 20, 2011 1:05 PM To: MS-Exchange Admin Issues Subject: Re: SMTP Load Balancing - Barracuda That sounds likely, I just don't see anywhere within the GUI to control that behaivor. - Sean On Thu, Jan 20, 2011 at 8:55 AM, Kennedy, Jim kennedy...@elyriaschools.orgmailto:kennedy...@elyriaschools.org wrote: Cuda's caching the dns lookup? From: Sean Martin [mailto:seanmarti...@gmail.commailto:seanmarti...@gmail.com] Sent: Thursday, January 20, 2011 12:43 PM To: MS-Exchange Admin Issues Subject: SMTP Load Balancing - Barracuda Good morning all, I've got two Barracuda SPAM/Virus Firewalls that I'm trying to setup for load balancing outgoing mail. The Barracuda's forward mail to a smarthost, and since they're clustered, I can't specify separate smart hosts per device. Barracuda documentation indicates this is accomplished using MX records. I created an MX record named testmx.domain.comhttp://testmx.domain.com/ and two A records both named test.domain.comhttp://test.domain.com/, one for each of the downstream smart hosts. However, both of the barracuda's appear to favor only one of the smart hosts when delivering outgoing mail. Repeated NSLookups against the MX record seem to alternate between the A records as expected. Any ideas on why this wouldn't work? - Sean --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.commailto:listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.commailto:listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.commailto:listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist
Re: SMTP Load Balancing - Barracuda
No not at all. Just trying to balance mail flow across our two sites. It's a documented feature, it's setup correctly (as far as I can tell), so I'm just frustrated that it is not working as intended. - Sean On Thu, Jan 20, 2011 at 9:56 AM, Missy Koslosky mi...@notsoclever.comwrote: Are the devices overworked with outgoing email? If not, I would not worry about that. *From:* Sean Martin [mailto:seanmarti...@gmail.com] *Sent:* Thursday, January 20, 2011 1:05 PM *To:* MS-Exchange Admin Issues *Subject:* Re: SMTP Load Balancing - Barracuda That sounds likely, I just don't see anywhere within the GUI to control that behaivor. - Sean On Thu, Jan 20, 2011 at 8:55 AM, Kennedy, Jim kennedy...@elyriaschools.org wrote: Cuda’s caching the dns lookup? *From:* Sean Martin [mailto:seanmarti...@gmail.com] *Sent:* Thursday, January 20, 2011 12:43 PM *To:* MS-Exchange Admin Issues *Subject:* SMTP Load Balancing - Barracuda Good morning all, I've got two Barracuda SPAM/Virus Firewalls that I'm trying to setup for load balancing outgoing mail. The Barracuda's forward mail to a smarthost, and since they're clustered, I can't specify separate smart hosts per device. Barracuda documentation indicates this is accomplished using MX records. I created an MX record named testmx.domain.com and two A records both named test.domain.com, one for each of the downstream smart hosts. However, both of the barracuda's appear to favor only one of the smart hosts when delivering outgoing mail. Repeated NSLookups against the MX record seem to alternate between the A records as expected. Any ideas on why this wouldn't work? - Sean --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist
RE: SMTP Load Balancing - Barracuda
You will need contact their support on that. They will tunnel in and adjust it for you. However ask them if this will reset each time you update the firmware, I suspect it will that is how any special settings I have had them make behave. There is a downside to what you are doing.turning down the dns cache will probably turn down all the dns cache'sso you will be doing far more lookups with it. JK That sounds likely, I just don't see anywhere within the GUI to control that behaivor. - Sean On Thu, Jan 20, 2011 at 8:55 AM, Kennedy, Jim kennedy...@elyriaschools.orgmailto:kennedy...@elyriaschools.org wrote: Cuda's caching the dns lookup? From: Sean Martin [mailto:seanmarti...@gmail.commailto:seanmarti...@gmail.com] Sent: Thursday, January 20, 2011 12:43 PM To: MS-Exchange Admin Issues Subject: SMTP Load Balancing - Barracuda Good morning all, I've got two Barracuda SPAM/Virus Firewalls that I'm trying to setup for load balancing outgoing mail. The Barracuda's forward mail to a smarthost, and since they're clustered, I can't specify separate smart hosts per device. Barracuda documentation indicates this is accomplished using MX records. I created an MX record named testmx.domain.comhttp://testmx.domain.com/ and two A records both named test.domain.comhttp://test.domain.com/, one for each of the downstream smart hosts. However, both of the barracuda's appear to favor only one of the smart hosts when delivering outgoing mail. Repeated NSLookups against the MX record seem to alternate between the A records as expected. Any ideas on why this wouldn't work? - Sean --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.commailto:listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.commailto:listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.commailto:listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.commailto:listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.commailto:listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist
RE: SMTP Load Balancing - Barracuda
I don't think you should have to (or want to) name the A records the same - that's what the equally weighted MX is for - but I also don't think that is necessarily your problem if you are getting the expected results when running nslookup from the Barracuda. From: Sean Martin [mailto:seanmarti...@gmail.com] Sent: Thursday, January 20, 2011 9:43 AM To: MS-Exchange Admin Issues Subject: SMTP Load Balancing - Barracuda Good morning all, I've got two Barracuda SPAM/Virus Firewalls that I'm trying to setup for load balancing outgoing mail. The Barracuda's forward mail to a smarthost, and since they're clustered, I can't specify separate smart hosts per device. Barracuda documentation indicates this is accomplished using MX records. I created an MX record named testmx.domain.comhttp://testmx.domain.com and two A records both named test.domain.comhttp://test.domain.com, one for each of the downstream smart hosts. However, both of the barracuda's appear to favor only one of the smart hosts when delivering outgoing mail. Repeated NSLookups against the MX record seem to alternate between the A records as expected. Any ideas on why this wouldn't work? - Sean --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.commailto:listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist
Re: SMTP Load Balancing - Barracuda
On 2011-01-20 19.42, Sean Martin wrote: I created an MX record named testmx.domain.com http://testmx.domain.com and two A records both named test.domain.com http://test.domain.com, one for each of the downstream smart hosts. I think that could mess up the cache logic in the barracudas. You should create two differently named A records, and two MX records with equal priorities. Like this: $ORIGIN domain.com. smarthost IN MX 1 smarthost1 IN MX 1 smarthost2 smarthost1 A ipaddress1 smarthost2 A ipaddress2 -- Eino Tuominen --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist
Re: SMTP Load Balancing - Barracuda
So, I don't even think it is possible to have the barracuda send mail directly and not use a smart host. That annoyed me. Bill Sean Martin wrote: Good morning all, I've got two Barracuda SPAM/Virus Firewalls that I'm trying to setup for load balancing outgoing mail. The Barracuda's forward mail to a smarthost, and since they're clustered, I can't specify separate smart hosts per device. Barracuda documentation indicates this is accomplished using MX records. I created an MX record named testmx.domain.com http://testmx.domain.com and two A records both named test.domain.com http://test.domain.com, one for each of the downstream smart hosts. However, both of the barracuda's appear to favor only one of the smart hosts when delivering outgoing mail. Repeated NSLookups against the MX record seem to alternate between the A records as expected. Any ideas on why this wouldn't work? - Sean --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com mailto:listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist
