{"id":6608,"date":"2016-10-31T07:31:16","date_gmt":"2016-10-31T11:31:16","guid":{"rendered":"http:\/\/g33kinfo.com\/info\/?p=6608"},"modified":"2016-10-31T07:31:16","modified_gmt":"2016-10-31T11:31:16","slug":"csf-spamhaus-network-connectivity-issues","status":"publish","type":"post","link":"https:\/\/g33kinfo.com\/info\/csf-spamhaus-network-connectivity-issues\/","title":{"rendered":"CSF, Spamhaus Network Connectivity Issues"},"content":{"rendered":"

Hi!<\/p>\n

Do you have a client who says that they cannot access their sites\/server and insists it\u2019s a network issue, but their IP addresses does not seem to be blocked by csf.deny and their sites are not loading in several parts of the world with a site checker like https:\/\/www.site24x7.com\/check-website-availability.html<\/a> or others? <\/p>\n

Well do I have quite the solution for you!<\/p>\n

This morning, we verified an issue regarding a CSF\/Spamhaus update in which CSF blocks any IP address that is over 128.0.0.0. This is due to a subnet that does not exist in the official list, 172.103.64.0\/1:<\/p>\n

https:\/\/www.spamhaus.org\/drop\/drop.lasso<\/a><\/p>\n

Unfortunately, CSF will round the 172.103.64.0\/1 down to 128.0.0.0\/1 which will block all IP addresses above that range. To remedy this, after verifying the subnet issue is present, remove the SPAMDROP list file:<\/p>\n

rm \/var\/lib\/csf\/csf.block.SPAMDROP<\/code><\/p>\n

And restart CSF<\/p>\n

csf -r<\/code><\/p>\n

Restarting CSF will generate a new (and correct) SPAMDROP list without the wonky subnet. <\/p>\n

Now, verify the sites on the server can load now throughout the world without issue:<\/p>\n

https:\/\/www.site24x7.com\/check-website-availability.html<\/a><\/p>\n

Enjoy!!!<\/p>\n","protected":false},"excerpt":{"rendered":"

Hi! Do you have a client who says that they cannot access their sites\/server and insists it\u2019s a network issue, but their IP addresses does not seem to be blocked by csf.deny and their sites are not loading in several parts of the world with a site checker like https:\/\/www.site24x7.com\/check-website-availability.html or others? Well do I… <\/p>\n

Read More<\/i><\/a><\/div>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[],"class_list":["post-6608","post","type-post","status-publish","format-standard","hentry","category-info"],"yoast_head":"\nCSF, Spamhaus Network Connectivity Issues - Linux Shtuff<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/g33kinfo.com\/info\/csf-spamhaus-network-connectivity-issues\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"CSF, Spamhaus Network Connectivity Issues - Linux Shtuff\" \/>\n<meta property=\"og:description\" content=\"Hi! Do you have a client who says that they cannot access their sites\/server and insists it\u2019s a network issue, but their IP addresses does not seem to be blocked by csf.deny and their sites are not loading in several parts of the world with a site checker like https:\/\/www.site24x7.com\/check-website-availability.html or others? Well do I... 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My passion for all things tech drives my hunt for all the coolz. I often need a vacation after I get back from vacation....\",\"sameAs\":[\"https:\\\/\\\/thelinuxreport.com\",\"https:\\\/\\\/fb.me\\\/g33kinf0\",\"https:\\\/\\\/x.com\\\/https:\\\/\\\/twitter.com\\\/drsinger1111\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"CSF, Spamhaus Network Connectivity Issues - Linux Shtuff","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/g33kinfo.com\/info\/csf-spamhaus-network-connectivity-issues\/","og_locale":"en_US","og_type":"article","og_title":"CSF, Spamhaus Network Connectivity Issues - Linux Shtuff","og_description":"Hi! 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