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Supporting Actor TV
2 0 0

ICMP unreachable - admin prohibited filter, Internet unusable

Hi there,

 

Since 28 of July, 2020 at 10:15h, internet is unusable.

 

Outgoing connections have a high chance of being rejected by some polite network element in UPC network. Those connections are dropped with an ICMP admin-prohibited.

 

This is a dump on a usual session, trying to navigate (just the ICMP following TCP SYN packets):

 

$ sudo tcpdump -i eth0 -n -s0 icmp
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes
01:26:37.913907 IP 192.0.0.1 > 192.168.1.19: ICMP host X.Y.249.131 unreachable - admin prohibited filter, length 36
01:27:04.677682 IP 192.0.0.1 > 192.168.1.19: ICMP host X.Y.239.108 unreachable - admin prohibited filter, length 36
01:27:05.689324 IP 192.0.0.1 > 192.168.1.19: ICMP host X.Y.239.108 unreachable - admin prohibited filter, length 36
01:27:07.690564 IP 192.0.0.1 > 192.168.1.19: ICMP host X.Y.239.108 unreachable - admin prohibited filter, length 36
01:27:11.152762 IP 192.0.0.1 > 192.168.1.19: ICMP host X.Y.54.167 unreachable - admin prohibited filter, length 36
01:27:11.153076 IP 192.0.0.1 > 192.168.1.19: ICMP host X.Y.54.167 unreachable - admin prohibited filter, length 36
01:27:11.280868 IP 192.0.0.1 > 192.168.1.19: ICMP host X.Y.54.167 unreachable - admin prohibited filter, length 36
01:27:11.281348 IP 192.0.0.1 > 192.168.1.19: ICMP host X.Y.251.197 unreachable - admin prohibited filter, length 36

Please advice.

2 REPLIES 2
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Supporting Actor TV
2 0 0

Re: ICMP unreachable - admin prohibited filter, Internet unusable

I've just managed to read other recent posts with users with the exact same problem. Seems that switching to IPv4 solved the problem for them.
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Community Manager
5537 1440 425

Re: ICMP unreachable - admin prohibited filter, Internet unusable

@proto , Welcome to the community!

For processing, please send us your customer number, address and date of birth via private message. We will then check the configuration of your modem.

 

Greetings
Daniele


Member of @UPC_Team