Port of 53
WebMar 24, 2015 · Hello, I have had some customer who experienced this issue. The most likely cause is that one of the PC's on your network, not the router, is infected with a virus and it is generating this traffic, now, since the ISP is not able to see inside of your network, they are pointing to the gateway to your location which is the router. WebI had this show up on a vulnerability scan as well but for UDP port 53. In my case I think the reason this showed up is we create our firewall policy rules to allow a specific src IP address over any port to connect to dest IP and dest port. In front of our firewall we have our internet router which we run an ACL on.
Port of 53
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WebDNS can use either the User Datagram Protocol (UDP) or Transmission Control Protocol (TCP) and historically uses a destination port of 53. When the DNS protocol uses UDP as the transport, it has the ability to deal with UDP retransmission and sequencing. WebSep 30, 2011 · The port is usually fixed, for DNS it's 53. Share Improve this answer Follow answered Sep 30, 2011 at 18:09 ott-- 5,622 4 23 27 Add a comment 2 If it is a normal then the port number is always 80 and may be written as http://www.somewhere.com:80 Though you don't need to specify it as :80 is the default of every web browser.
WebProbe Port 53 Enter Port: 0-65535 Goto Port 54 Port Authority Database Port 53 Background and Additional Information: It is difficult to imagine the practical use of the Internet without the convenient name-to-IP address mapping provided by DNS. WebMar 15, 2024 · DNS uses Port 53 which is nearly always open on systems, firewalls, and clients to transmit DNS queries. Rather than the more familiar Transmission Control …
WebJan 5, 2004 · When our internal DNS server reached the firewall (outbound), the firewall gave it for example 10.10.10.10 with source port 69 and sent it on out to the external DNS server. When the frame came back, it had source port of 53 and dst port of 69. By having the deny udp tftp on the perim, we were actually denying legitimate traffic. WebFeb 23, 2024 · The Windows Redirector also uses ICMP Ping messages to verify that a server IP is resolved by the DNS service before a connection is made, and when a server is located by using DFS. If you want to minimize ICMP traffic, you can use the following sample firewall rule: ICMP -> DC IP addr = allow.
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