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[SURBL-Announce] ADVISORY: Please set up local DNS servers for high volume mail servers
by Jeff Chan 23 Apr '04

23 Apr '04

For folks processing more than a a few hundred thousand messages per day, please set set up a local caching name server for any of the RBLs you are using, including SURBLs. This is considered a standard, good practice since it offloads the public name servers. A very popular and fast name server specifically meant for serving up RBLs is rbldnsd: http://www.corpit.ru/mjt/rbldnsd.html SURBL zone files are available in rbldnsd format. Then arrange with the RBLs to get rsync access to their zone files. Since rsync only transmits differences, the zone files are kept updated in a very efficient manner. For example to get rsync access to SURBL zone files, please contact Raymond at rsync at surbl dot org. Other RBLs have similar procedures for gaining rsync access. Then configure your mail servers using RBLs to query your local forwarding RBL name server. Thanks, Jeff C. P.S. Please don't grab zone files from our web site for production or even hobbyist mail servers, as I see some people apparently doing right now. I want to say that's really lame, but that would be rude. ;-) -- Jeff Chan mailto:jeffc@surbl.org http://www.surbl.org/

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ANNOUNCE: Mail::SpamAsssassin::SpamCopURI 0.14
by Eric Kolve 23 Apr '04

23 Apr '04

Release 0.14 is up on sourceforge.net. Sorry about all these releases. This is just a small one to fix the 'Modification of non-creatable array value attempted' error a few people have been seeing. You can fetch it at http://sourceforge.net/projects/spamcopuri --eric

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ANNOUNCE: Mail::SpamAsssassin::SpamCopURI 0.13
by Eric Kolve 23 Apr '04

23 Apr '04

I have just released SpamCopURI 0.13. This release adds some basic query caching as well as registrar based lookups against the RBL. Instead of querying for both the 2nd and 3rd level domain we are now only querying for the 2nd OR the 3rd based on the TLD. Let me know if you see any issues with this: false positives, misses that should be hits, etc. We are now caching the query results on a per test basis so multiple URLs to the same to domain should only get checked once per RBL. There is also a change that fixes a compile error under Perl 5.005 reported on this list. Open redirect resolution is still off by default. I would like to hear how this has worked out for those that have enabled it. Do you think its safe enough to enabled it by default? The latest release can be retrieved from http://sourceforge.net/projects/spamcopuri --eric

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[SURBL-Announce] ANNOUNCE: BigEvil.cf and MidEvil.cf are now available in SURBL form as be.surbl.org
by Jeff Chan 22 Apr '04

22 Apr '04

BigEvil.cf and MidEvil.cf are now available in SURBL form as be.surbl.org, for use with SpamCopURI SpamAssassin 2.63 and URIDNSBL SpamAssassin 3.0 plugins. Thanks Chris, Paul and Gary Funck! Here's an excerpt about the new list from the Quick Start section: http://www.surbl.org/ Chris Santerre and Paul Barbeau's BigEvil and MidEvil SpamAssassin rules are now available as an SURBL for use with plugins and programs such as those mentioned above which can extract message body URI domains and compare them against name-based RBLs. The name of the list is be.surbl.org, and some sample rules and scores to use it appears below. The well-known and popular BigEvil and MidEvil SA rulesets are used to block messages based on domains that have occurred in spam message body URIs. Using this as an SURBL instead allows you to remove this relatively large ruleset from SA memory and lets DNS cache the data in a zone file instead, querying SURBL hits from DNS as needed. An SA 2.63 rule and score using SpamCopURI (but not the SpamCop data!) looks like this: uri BE_URI_RBL eval:check_spamcop_uri_rbl('be.surbl.org','127.0.0.2') describe BE_URI_RBL URI's domain appears in BigEvil tflags BE_URI_RBL net score BE_URI_RBL 3.0 An SA 3.0 rule and score using URIBL's urirhsbl looks like this: urirhsbl URIBL_BE_SURBL be.surbl.org. A header URIBL_BE_SURBL eval:check_uridnsbl('URIBL_BE_SURBL') describe URIBL_BE_SURBL Contains a URL listed BigEvil tflags URIBL_BE_SURBL net score URIBL_BE_SURBL 3.0 be.surbl.org can be used alone or with other SURBL lists; all that's needed are different rule and score names, as we've shown in the samples. More information about be.surbl.org can be found in the Additional SURBLs section. http://www.surbl.org/additional.html be.surbl.org joins Bill Stearns' sa-blacklist-based ws.surbl.org and my own SpamCop URI-based sc.surbl.org SURBLs. All are described more at the site. Please send me any questions, comments, corrections, updates, etc. Cheers, Jeff C. P.S. We will probably offer a combined list at some point. We're still working out the details of that. Until then it's quite possible to use one or more of the lists simply by using separate SA rules for each one that you want to use, as shown in the Quick Start samples. P.P.S. The sample rules have been updated to mention "SpamCop" only in the descriptions of rules that actually use SpamCop data. -- Jeff Chan mailto:jeffc@surbl.org http://www.surbl.org/

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ANNOUNCE: Mail::SpamAsssassin::SpamCopURI 0.12
by Eric Kolve 21 Apr '04

21 Apr '04

Just release 0.12 to fix a test some users may have had errors with during make test. No real need to grab this unless you want a clean make test. --eric

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ANNOUNCE: Mail::SpamAsssassin::SpamCopURI 0.11
by Eric Kolve 21 Apr '04

21 Apr '04

I have just released SpamCopURI version 0.11. This fixes a few bugs that had been reported and adds open redirect resolution. This basically takes a URL from say rd.yahoo.com and attempts to resolve the Location header without ever fetching from the potential spammy site. Only the URLs that have hosts that match an address list get redirect resolution. As well, redirect resolution is off by default, but can be enabled in the conf file. I have placed several open redirect sites in the conf file. The basic requirement is that the redirect return a 300 level HTTP response when fetching. I placed google.com in there even though they don't have their own redirect domain, but this should be fairly safe since most if not all google URLs are either redirects or searches. Give it a try and tell me what you think. This is all dependent upon LWP, but if you don't have LWP everything else will function as it did before. I have removed all the deprecated tests that depended on local Storable data. See the INSTALL file for information about upgrading from a previous version. There is also a bit more information about installation that should help those that had trouble in the past. --eric

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SURBL testpoint changed, TXT records shortened
by Jeff Chan 21 Apr '04

21 Apr '04

Here are a couple changes to the SURBL testpoints and TXT records: http://www.surbl.org/news.html 4/20/04: SURBL testpoints "example.com" have been changed to "surbl-org-permanent-test-point.com" to avoid potential spam detection on sample URIs. So the SURBL testpoints are now: Name: test.sc.surbl.org.sc.surbl.org (with ws for sc, etc.) Address: 127.0.0.2 Name: test.surbl.org.sc.surbl.org Address: 127.0.0.2 Name: 2.0.0.127.sc.surbl.org Address: 127.0.0.2 Name: surbl-org-permanent-test-point.com.sc.surbl.org Address: 127.0.0.2 4/20/04: TXT record for sc.surbl.org is changed from: "Message body contains recently and multiply-reported SpamCop spamvertised domain." to: "Message body contains SpamCop spamvertised domain." TXT record for ws.surbl.org is changed from: "Message body contains domain in sa-blacklist. See: http://www.stearns.org/sa-blacklist/" to: "Blocked, See: http://www.stearns.org/sa-blacklist/". Please update any test suites, rules, configs and other code accordingly. We expect these to be (more) stable. :-) (The default/sample SA 2.63 SpamCopURI and SA 3.0 urirhsbl rules seem to write their own text descriptions based on the A record, so these changes probably do not affect most SpamAssassin users of SURBLs. Other applications may need to make adjustments if they were using the TXT records.) Jeff C. -- Jeff Chan mailto:jeffc@surbl.org http://www.surbl.org/

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[SURBL-Announce] Administrivia: announce replies go to discuss, discuss replies go to list
by Jeff Chan 21 Apr '04

21 Apr '04

We've changed the list settings slightly to direct replies to this announcement list to go to the discussion list, and for replies on the discussion list to go to the list by default rather than to the poster. discuss(a)lists.surbl.org Hope that's ok with everyone. Please reply off list if it's not. :-) Jeff C. -- Jeff Chan mailto:jeffc@surbl.org http://www.surbl.org/

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SURBL Implemetation Guidelines
by Jeff Chan 20 Apr '04

20 Apr '04

We're made a document describing some of the general properties which code using SURBLs should have in order to use the data as it was designed and intended. We hope these comments may be useful to developers. Our Implementation Guidelines are brief and copied below. http://www.surbl.org/implementation.html Implementation Guidelines Here are some very brief guidelines for folks writing software to use SURBL lists. Your code should: 1. Extract URIs from message bodies. (Extraction of URIs from message bodies should ideally include full resolution of redirections into the final target domain name. This can be a non-trivial problem.) 2. Extract base (registrar) domains from those URIs. This includes removing any and all leading host names, subdomains, www., randomized subdomains, etc. In order to determine the base domain it may be necessary to use a table of country code TLDs (ccTLDs) such as the partially-imcomplete one SURBL uses. 3. Not do name resolution on the domains. 4. Look up the domain name in the SURBL by prepending it to the name of the SURBL, e.g., domainundertest.com.sc.surbl.org, then doing Address record DNS resolution on the resulting combined name. A non-result indicates lack of inclusion in the list. A result of 127.0.0.2 represents inclusion, i.e., probable spam. 5. Handle numeric IPs in URIs similarly, but reverse the octet ordering before comparison against the RBL. This is standard practice for RBLs. For example, http://1.2.3.4/ is checked as 4.3.2.1.sc.surbl.org. SURBL lists unusually have both names and numbers in the same list. For example, 2.0.0.127 and test.surbl.org and similar actual spam domains and addresses are both in all SURBL lists. Numbered addresses in SURBLs should have occurred in spams as numbers, e.g.: literally http://1.2.3.4/. Additional SURBL test points are mentioned in the News & Notes section. __ Please send me any comments, updates, revisions, corrections, questions, etc... Jeff C. -- Jeff Chan mailto:jeffc@surbl.org http://www.surbl.org/

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[SURBL-Announce] SURBL web site updated, Letter to Redirectors added
by Jeff Chan 19 Apr '04

19 Apr '04

I've udpated the SURBL web site to use frames and have freshened the content slightly. Please let me know if you spot any broken links, etc. http://www.surbl.org/ Also added "An Open Letter To Operators Of Redirection Sites" in which we try to appeal to redirection sites to deny their services to spam URI domains (e.g., spammers' web sites). Redirection sites may become an increasing problem if we're successful in blocking spams with their sites directly linked. http://www.surbl.org/redirect.html Comments, revisions, questions, suggestions on any of that are welcomed. Cheers, Jeff C. -- Jeff Chan mailto:jeffc@surbl.org http://www.surbl.org/

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