RE: Comcast.net email servers - temporarily blacklisted IP Address errors
Hey folks, Someone forwarded this directly to my inbox, much appreciated. We’ll work with Martin to get this sorted out. -- Alex Brotman Sr. Engineer, Anti-Abuse & Messaging Policy Comcast From: NANOG On Behalf Of Martin Cook Sent: Friday, June 7, 2024 2:15 PM To: nanog@nanog.org Subject: Comcast.net email servers - temporarily blacklisted IP Address errors Hello NANOG, We recently started getting some complaints from customers experiencing an error when trying to access their old Comcast.net email accounts with one of their email clients (outlook tbird etc.) via POP3 or IMAP. Web based use of their email via the Comcast portal is unaffected. "ERR [AUTH] Temporarily blacklisted IP Address - try again later" These customers are previous Residential HSI subscribers of Comcast who have since moved to other internet service providers, including ours, and are still allowed to use their old email accounts. There is a web portal based method for attempting to get individual IP addresses removed from the "temporary black list". But due to the number of reports we have had in a very short period of time we believe an entire range of IP's (possibly a /17) has been blacklisted as of last Friday-ish We're having difficulty resolving this issue through Comcast customer support or the Comcast Security assurance team. So I'm looking to see if anyone from Comcast or someone who has had this issue before reach out off-list to assist with resolving this headache. Enjoy N91 next week for all the people attending, stop by to attend Jason Rokeach's talk on "meshrr: Hierarchical Route Distribution @ Scale w/ Kubernetes on Wednesday!" I'm sure he will have some awesome things to show everyone. Thanks, Martin Cook
Re: Comcast.net email servers - temporarily blacklisted IP Address errors
https://www.mailop.org/ - Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest-IX http://www.midwest-ix.com - Original Message - From: "Martin Cook" To: nanog@nanog.org Sent: Friday, June 7, 2024 1:15:17 PM Subject: Comcast.net email servers - temporarily blacklisted IP Address errors Hello NANOG, We recently started getting some complaints from customers experiencing an error when trying to access their old Comcast.net email accounts with one of their email clients (outlook tbird etc.) via POP3 or IMAP. Web based use of their email via the Comcast portal is unaffected. "ERR [AUTH] Temporarily blacklisted IP Address - try again later" These customers are previous Residential HSI subscribers of Comcast who have since moved to other internet service providers, including ours, and are still allowed to use their old email accounts. There is a web portal based method for attempting t o get individual IP addresses removed from the "temporary black list". But due to the number of reports we have had in a very short period of time we believe an entire range of IP's (possibly a /17) has been blacklisted as of last Friday-ish We're having difficulty resolving this issue through Comcast customer support or the Comcast Security assurance team. So I'm looking to see if anyone from Comcast or someone who has had this issue before reach out off-list to assist with resolving this headache. Enjoy N91 next week for all the people attending, stop by to attend Jason Rokeach's talk on "meshrr: Hierarchical Route Distribution @ Scale w/ Kubernetes on Wednesday!" I'm sure he will have some awesome things to show everyone. Thanks, Martin Cook
Comcast.net email servers - temporarily blacklisted IP Address errors
Hello NANOG, We recently started getting some complaints from customers experiencing an error when trying to access their old Comcast.net email accounts with one of their email clients (outlook tbird etc.) via POP3 or IMAP. Web based use of their email via the Comcast portal is unaffected. "ERR [AUTH] Temporarily blacklisted IP Address - try again later" These customers are previous Residential HSI subscribers of Comcast who have since moved to other internet service providers, including ours, and are still allowed to use their old email accounts. There is a web portal based method for attempting to get individual IP addresses removed from the "temporary black list". But due to the number of reports we have had in a very short period of time we believe an entire range of IP's (possibly a /17) has been blacklisted as of last Friday-ish We're having difficulty resolving this issue through Comcast customer support or the Comcast Security assurance team. So I'm looking to see if anyone from Comcast or someone who has had this issue before reach out off-list to assist with resolving this headache. Enjoy N91 next week for all the people attending, stop by to attend Jason Rokeach's talk on "meshrr: Hierarchical Route Distribution @ Scale w/ Kubernetes on Wednesday!" I'm sure he will have some awesome things to show everyone. Thanks, Martin Cook
Weekly Global IPv4 Routing Table Report
This is an automated weekly mailing describing the state of the Global IPv4 Routing Table as seen from APNIC's router in Japan. The posting is sent to APOPS, NANOG, AfNOG, SANOG, PacNOG, SAFNOG UKNOF, TZNOG, MENOG, BJNOG, SDNOG, CMNOG, LACNOG and the RIPE Routing WG. Daily listings are sent to bgp-st...@lists.apnic.net. For historical data, please see https://thyme.apnic.net. If you have any comments please contact Philip Smith . IPv4 Routing Table Report 04:00 +10GMT Sat 08 Jun, 2024 BGP Table (Global) as seen in Japan. Report Website: https://thyme.apnic.net Detailed Analysis: https://thyme.apnic.net/current/ Analysis Summary BGP routing table entries examined: 952310 Prefixes after maximum aggregation (per Origin AS): 362531 Deaggregation factor: 2.63 Unique aggregates announced (without unneeded subnets): 464792 Total ASes present in the Internet Routing Table: 75901 Prefixes per ASN: 12.55 Origin-only ASes present in the Internet Routing Table: 65054 Origin ASes announcing only one prefix: 26721 Transit ASes present in the Internet Routing Table: 10847 Transit-only ASes present in the Internet Routing Table:540 Average AS path length visible in the Internet Routing Table: 4.3 Max AS path length visible: 60 Max AS path prepend of ASN ( 53153) 57 Prefixes from unregistered ASNs in the Routing Table: 997 Number of instances of unregistered ASNs: 999 Number of 32-bit ASNs allocated by the RIRs: 44691 Number of 32-bit ASNs visible in the Routing Table: 36556 Prefixes from 32-bit ASNs in the Routing Table: 187335 Number of bogon 32-bit ASNs visible in the Routing Table:14 Special use prefixes present in the Routing Table:1 Prefixes being announced from unallocated address space:605 Number of addresses announced to Internet: 3024734848 Equivalent to 180 /8s, 73 /16s and 202 /24s Percentage of available address space announced: 81.7 Percentage of allocated address space announced: 81.7 Percentage of available address space allocated: 100.0 Percentage of address space in use by end-sites: 99.6 Total number of prefixes smaller than registry allocations: 312161 APNIC Region Analysis Summary - Prefixes being announced by APNIC Region ASes: 255145 Total APNIC prefixes after maximum aggregation: 74211 APNIC Deaggregation factor:3.44 Prefixes being announced from the APNIC address blocks: 247236 Unique aggregates announced from the APNIC address blocks: 101269 APNIC Region origin ASes present in the Internet Routing Table: 14205 APNIC Prefixes per ASN: 17.40 APNIC Region origin ASes announcing only one prefix: 4335 APNIC Region transit ASes present in the Internet Routing Table: 1910 Average APNIC Region AS path length visible:4.6 Max APNIC Region AS path length visible: 55 Number of APNIC region 32-bit ASNs visible in the Routing Table: 9598 Number of APNIC addresses announced to Internet: 761679488 Equivalent to 45 /8s, 102 /16s and 78 /24s APNIC AS Blocks4608-4864, 7467-7722, 9216-10239, 17408-18431 (pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319, 58368-59391, 63488-64098, 64297-64395, 131072-153913 APNIC Address Blocks 1/8, 14/8, 27/8, 36/8, 39/8, 42/8, 43/8, 49/8, 58/8, 59/8, 60/8, 61/8, 101/8, 103/8, 106/8, 110/8, 111/8, 112/8, 113/8, 114/8, 115/8, 116/8, 117/8, 118/8, 119/8, 120/8, 121/8, 122/8, 123/8, 124/8, 125/8, 126/8, 133/8, 150/8, 153/8, 163/8, 171/8, 175/8, 180/8, 182/8, 183/8, 202/8, 203/8, 210/8, 211/8, 218/8, 219/8, 220/8, 221/8, 222/8, 223/8, ARIN Region Analysis Summary Prefixes being announced by ARIN Region ASes:276985 Total ARIN prefixes after maximum aggregation: 125335 ARIN Deaggregation factor: 2.21 Prefixes being announced from the ARIN address blocks: 281544 Unique aggregates announced from the ARIN address blocks:134667 ARIN Region origin ASes present in the Internet Routing Table:19149 ARIN Prefixes per ASN:
Hosteurope / GoDaddy contact
Hi, We are dealing with unannounced SOA record changes from Hosteurope to our domain. Is there anyone from Hosteurope / GoDaddy who we could reach out to quickly resolve this matter? Thanks, Umut
