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Questions tagged [ttl]

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RDP Dropping When TTL Changes From 127 to 63

Currently when connecting to our work server through VPN and RDP the RDP connection drops every once in a while and then comes back. I started a continuous ping to the server and noticed that it drops ...
Quinntessential's user avatar
0 votes
2 answers
81 views

Do destination hosts decrement the TTL?

I was trying to understand more about traceroute when I stumbled upon this site and I have a question about this diagram: As you can see in the diagram, the destination host S1 receives a packet ...
Noob_Guy's user avatar
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1 vote
2 answers
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What TTL value should i use to make sure the packet never leaves the broadcast domain

If i put the TTL as 0, will it never leave my broadcast domain? If I wanna send something to someone in my broadcast domain, can the ttl be 0 or will it still be dropped? Or should it be 1?
Tomas Ramos's user avatar
1 vote
1 answer
79 views

The TTL and packet drop [duplicate]

I would just like to verify one thing. When a router receives a packet with a TTL of 1, the router can still process and accept it if its destined for itself, correct? Because for example, eBGP ...
Mitrixsen's user avatar
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0 votes
3 answers
103 views

Accurate TTL calculation

I previously thought that TTL is a counter of hopes to device. Today I learned that this is not so, but is connected with the processing time of packets. Those maximum TTL = 255, equals the maximum ...
Глеб Щеголев's user avatar
1 vote
1 answer
44 views

ipsrc multicast group

I'm looking at some traces where a TTL exceeded in transit ICMP message with ipsrc as mcast is captured. The ICMP message is referencing the original ip header with a correct structure [ipsrc ucast, ...
nseu's user avatar
  • 11
0 votes
2 answers
447 views

IP packet expired by TTL generate an ICMP response in any case?

Acording to Wikipedia IPv4 article for TTL header field: An eight-bit time to live field limits a datagram's lifetime to prevent network failure in the event of a routing loop. It is specified in ...
rfmoz's user avatar
  • 103
1 vote
3 answers
1k views

How traceroute add TTL field to UDP header?

If the UDP packet's header is a fixed 8 bytes size, how it does not contain a field for TTL, How traceroute put that field ?
عبدالرحمن الشماس's user avatar
1 vote
1 answer
286 views

How are TCP segments discarded after Maximum Segment Lifetime expires?

From RFC 793: To be sure that a TCP does not create a segment that carries a sequence number which may be duplicated by an old segment remaining in the network, the TCP must keep quiet for a maximum ...
giuliotal's user avatar
0 votes
1 answer
24 views

How to ensure packet was created within certain time?

I am creating a custom protocol over UDP and I want to use a low number of bits for the sequence number. This means that the number can wrap relatively fast. Is setting the TTL for the outgoing ...
Daniel's user avatar
  • 101
-1 votes
3 answers
6k views

Confusion about TTL when pinging

TTL value of a packet is supposed to decrease 1 at each router from 255 down to zero as follows: But when I ping to 8.8.8.8 the TTL starts at 253 and doesn't change: How can this be explained? Why ...
pnatk's user avatar
  • 101
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2 answers
917 views

Is TCP's MSL value equivalent to IP's TTL value?

Definition of MSL according to RFC 793: Maximum Segment Lifetime, the time a TCP segment can exist in the internetwork system. Arbitrarily defined to be 2 minutes. Definition of TTL according to ...
Argon's user avatar
  • 113
1 vote
0 answers
107 views

In Bgp TTL security all control packets will have configured hop value?

Topology: loop(2.1.1.1) - routerA (192.168.1.2)--------- (192.168.1.1) routerB - loop(1.1.1.1) I have eBGP peering configured with a Multihop of 2 on both sides and static routes to reach loopbacks. ...
Maradana Kumar's user avatar